Surge arrester for 1-Wire Professional bus master - 5000 amps (Type 2)


Surge arrester for 1-Wire Professional bus master - 5000 amps (Type 2)

Item number 451-6

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Newly designed protection element for overvoltages and overcurrents with three protection levels and one function level. The protection cascade combines a high discharge capacity with a short response time and ultra-fast current limiting, resulting in a superior protection effect. One function level improves the achievable range.

NEW! Surge arrester and overcurrent protection in one module, certified for 5,000 amps (pulse class C2, tested at 10,000 V).
NEW! clamping voltage only 10 V on the device side (after 1 µs)
NEW! combination of four stages with a total of 24 protection and flashover paths

NEW! PE connection with very low contact resistance for uncut and low-impedance connection with 2.5 mm²
NEW! Including two sets of terminals blue, grey and orange for three-pole connection of 1-wire (5V, GND, DATA)
NEW! Now also available as SparPack or SuperSparPack with addition (one piece for five pieces or two pieces for 10 pieces)

This lightning protection module is designed for 1-wire bus systems with the ElabNET Professional bus master or for protecting the integrated 1-wire channels of the Timberwolf servers.

For 1-wire bus systems with other bus masters (e.g. Maxim DS9490R, Loxone 1-wire extension), we offer a separate protection module optimised for these bus masters that also contains a bus boost stage for increasing the range (this is included in the PBM or the Timberwolf servers mentioned).


  • Very low protective voltage: Four-stage module for a protective voltage of only 10 V on the device side after 1 µs
  • Overcurrent protection included: Module also contains overcurrent protection (limited to 50 / 200 mA)
  • Optimum protection of servers: Particularly suitable for protecting Professional Busmasters or Timberwolf Servers
  • Solid protective earth connection: PE connection with low impedance that allows uncut routing
  • Overall protection: Through the combination of short response time, low protection level and fast current limiting, this protection element minimises the load on the protected devices in the 1-wire bus system as well as on all insulations, especially on the device side, to practically zero.
  • Improved range: Additional filter elements optimise the achievable range


Lightning and surge protection system certified according to DIN / IEC 61643, tested for use with the ElabNET Professional Busmaster PBM (as a stand-alone device or included in Timberwolf Server 350Q, 950Q and 960Q) as well as the integrated Busmaster in all versions of the 3500 series.

For use with other 1-Wire bus masters or with the Loxone 1-Wire Extension, we offer a separate BlitzART 1-Wire protection module optimised for this purpose.

  • ElabNET PBM: Optimum protection of the 1-wire connections of the ElabNET Professional bus master.
  • Timberwolf Server: Optimal protection of the 1-Wire connections on Timberwolf Server 350Q, 950Q, 960Q and 3500 (all variants)


  • Area of application: Module for protecting the 1-Wire installation against overvoltage and, opposite the device side, also against overcurrent (protection PBM / server)
  • Protection levels: Innovative four-stage surge arrester including overcurrent protection, low dynamic resistance due to parallel-acting protective gaps
  • Protection gaps: 24 protection gaps, consisting of six bidirectional flashover gaps plus 15 protection gaps via diodes plus three protection gaps via current limiters
  • Response time: Short response time of the entire module of less than 40 ps
  • PE connection: Low-impedance PE connection for uncut connection for lightning equipotential bonding with 2.5 mm².
  • Protection level bus side 1-Wire Data against GND: < 527 V (with pulse class C2, 10,000 V (1.2/50 µs) / 5,000 A (8/20 µs)
  • Protection level device side 1-Wire Data against GND: < 10 V after 1 µs (for pulse class C2, 10,000 V (1.2/50 µs) / 5,000 A (8/20 µs))
  • Protection level bus side 5 Volt against GND: < 527 V (for pulse class C2, 10,000 V (1.2/50 µs) / 5,000 A (8/20 µs))
  • Protection level device side 1-Wire Data against GND: < 10 V after 1 µs (for pulse class C2, 10,000 V (1.2/50 µs) / 5,000 A (8/20 µs)
  • Overall protection: Due to the combination of short response time, low protection level and fast current limiting, this protection element minimises the load on the protected 1-Wire bus masters, devices and insulation, especially on the device side, to practically zero.
  • Increased range: Optimisation of the range through band-pass filters in the fourth stage.
  • Certification: This surge arrester for information technology systems has been certified according to IEC 61643-21-2001 + A1:2009 test C2 for "fast rising edge" and corresponds to arrester type 2.
  • Made in Germany


  • Note connection side: Due to the different protective character of the two module connections (bus side vs. device side), we recommend connecting the long part of the installation on the bus side and the short part - especially for the protection of bus master, extension and server - on the device side of the module.
  • Additional modules on the same bus: The bus can be protected with several such modules. In this case, only the bus side should be connected and the 1-Wire bus should be routed past the module (short branches with 1-Wire devices on the device side may be connected).
  • Long bus systems: For long buses, we recommend one such module every 50 to 100 m. Here, too, the module is to be connected only with the bus side facing the 1-Wire bus cabling.


  • 1-Wire: This module is compatible with 1-Wire bus systems and 1-Wire devices / slaves.
  • Professional Busmaster: This module is specially optimised for the higher supported currents of the Professional Busmaster via 5 V / GND.
  • Timberwolf Server: This module is specially optimised for the higher supported currents of the PBM integrated in the 350Q, 950Q and 960Q models.

Note on Loxone and other bus masters: For other 1-Wire bus masters such as Maxim DS9490R as well as Loxone 1-Wire Extension, we recommend the separately available 1-Wire BlitzART protection module, which in addition to a tighter current limit includes a band-pass filter and a BusBoost stage for improving the range on the 1-Wire bus.

The capacitive load of the data line of the 1-Wire bus (DATA) by this surge arrester is a few picofarads, which corresponds to the capacitive load of less than 1 m of bus line.


  • What is the function of the BlitzART 1-Wire PBM surge arrester?
    The BlitzART 1-Wire surge arrester for PBM reduces the consequences of a near and far lightning strike by means of rapid equalisation between all connected cores with the lightning current potential equalisation and an almost complete interruption of the current flow between the bus and the device side of the module. This equalisation and blocking reduces voltages and thus protects components and insulation of the 1-Wire devices and the 1-Wire bus lines.
  • Reduced means "not complete"?
    No system in the world can offer 100% safety. However, depending on the design, it is possible to significantly reduce the probabilities of damage caused by lightning. This BlitzART 1-Wire PBM surge arrester, with its short response time and low protection level, is able to offer the best available level of protection for 1-Wire systems. Especially when these arresters are installed at several points in the system. On the device side of the module, the overvoltage is virtually eliminated. Even with an overvoltage of 10,000 V and 5,000 A (8/20 µs) on the bus side, the protective voltage on the device side is only 10 V at a few mA after 1 µs. This eliminates any damage to the 1-Wire components on the device side of the module.
    For maximum effectiveness of the arresters, we recommend supplementing the low-voltage part of the system with arresters for power engineering systems type 1 and type 2 (or combination arresters type 1/2). Consult a specialist company for this.
  • What are the planning and installation recommendations for the best protection?
    Please plan one or more modules per 1-wire bus, depending on the scope of the bus system.

    Install one module in direct spatial proximity to the protection of the 1-Wire Professional bus master or the Timberwolf Server models in which this bus master is integrated. Loop the connections of the 1-Wire channels directly via the device side of the module to the 1-Wire bus (which you connect on the bus side).

    In the case of a longer bus (more than 50 m), we recommend installing another module in the middle of the bus. Connect the 1-Wire bus here only to the bus side of this module. You can either connect a branch with 1-Wire devices to the device side or leave this connection unused.

    With very long 1-Wire buses, install another module every 50 to 100 m.

    Most important recommended additional measure: Have internal lightning protection (type 1 and type 2 arresters) for power engineering networks installed on the low-voltage side.

  • As a SELV system, the 1-Wire is galvanically separated from everything else and the lines are shielded. How can an overvoltage, a lightning strike destroy this?
    Nothing is perfect, not even foil shields. Therefore, capacitive and inductive coupling of the lightning energy is possible. In addition, although the insulations are designed for 4,000 V, lightning generates voltages of up to several hundred thousand volts. Therefore, all insulations are at risk, especially in the case of close proximity / contact with PE, neutral and all external conductors. We recommend separate, separate cable routing of all lines of information technology systems, as well as signal and bus lines of power supply lines. Separate metallic and closed cable trays or ducts for cable routing would be optimal.

    There is a danger in the case of laid-on shielding (this is generally not recommended, may be useful in individual cases for interference suppression). In the case of a nearby lightning strike, the lightning voltage is conducted through the foundation earth electrode into the house and thus to the PE of the entire building. This stresses the insulations within the bus lines. This surge arrester 1-Wire PBM has a low-impedance PE connection and compensates for potential differences. Please connect the PE connection of the protective modules to the same PE terminal block to which the shielding is laid. From this terminal block, a length of at least 2 m to the PAS should be maintained (so that, purely in terms of time, a type 2 arrester can switch through first).
  • What endangers the insulation?
    Ein Blitzschlag bedeutet eine Entladung zwischen Wolke und Erde über eine Luftstrecke, die kurzzeitig leitfähig ist. Ausgehend von dem Blitzkanal als stromdurchflossener Leiter wird ein elektrisches und ein magnetisches Feld um diesen herum erzeugt. Diese Felder koppeln kapazitiv und induktiv in Leitungen und Leiterschleifen ein und ändern die Potentiale in allen metallischen Leitern im gesamten Gebäude. Die nahe Erde kann nur einen Teil der Blitzenergie aufnehmen. Etwa die Hälfte der Energie wird durch den Fundamenterder über PE in das Gebäude geleitet. Damit steht bei einem nahen Blitzschlag die Potentialausgleichsschiene und damit der gesamte PE über den Fundamenterder unter einem sehr hohen Spannungspotential von mehreren zehntausend Volt. Diese Potentialunterschiede wollen sich untereinander und zur fernen Erde in der über den Netzanschluss erreichbaren Trafostation (und je nach Netzform auch zur Erde der benachbarten Gebäude) hin ausgleichen. Um diesen Weg nehmen zu können, versucht die Blitz
  • How does this BlitzART surge arrester protect?
    The different potentials that form in metallic conductors when lightning strikes close by want to equalise. The equalisation takes the path of least resistance. The BlitzART 1-Wire PBM surge arrester offers the surge a simple path by creating a massive short-circuit almost immediately in the event of a sudden voltage increase, through which the potentials can equalise. The BlitzART 1-Wire PBM surge arrester involves the three connected 1-Wire conductors and PE and creates a short-circuit between all four connections. This offers the surge an immediate and low-impedance equalisation, so that potential differences are considerably reduced and insulation and components are thus protected.
    Such an overvoltage event is completed in this area of the cabling after only twenty millionths of a second. During this short time, the components convert several thousand W of heat. A lightning bolt has an average energy of 280 kWh, about one tenth of which is converted on the ground and in the installations. When the event is completed, the components of the BlitzART protection module automatically switch back to the non-activated state.
  • Why are there 24 switching, protection and flashover paths in this BlitzART 1-Wire PBM surge arrester?
    Each component for surge protection has its own characteristics with regard to reaction time, voltage limitation, tripping voltage, maximum voltage, leakage capacity, heat absorption, leakage current, capacitance and polarity. There is no component that is the leader in each of these characteristics; often one of the parameters is very pronounced, while others are less intensive. So that we did not have to make a compromise with this BlitzART surge arrester, we combined several components with a total of 24 protection and surge paths in a three-stage protection cascade in such a way that components with the shortest possible reaction time complement each other with components with a high leakage capacity. In this way, we achieve a previously impossible level of protection.
  • I have taken the module out of the module. On the underside of the board I see nine component pins that are not soldered. Has something been forgotten here?
    No, these nine pins belong to the high-current PE connection. Over the four edges of each of the nine pins, the component is homogeneously cold-welded to the through-platings of the board by a press fit in the factory at a total of 36 connection points. This connection technology is mechanically very stable (extraction force 900 N), at the same time very low-impedance (less than 200 µOhm), permanently gas-tight and can carry high currents (500 amperes permanently). With this - and in conjunction with the crimped cable lug for uncut PE connection with a high cross-section - we achieve a particularly low-impedance PE connection.
  • Are there any tips for the connection to PE?
  1. Same PE terminal blocks: If a surge arrester protects devices that themselves have a mains voltage connection with a protective earth conductor (for example, a power supply unit for supplying PBMs and/or servers), then the PE connection of the surge arrester should be routed to the equipotential bonding with the same or lower impedance than the connection of the protective earth conductor of the device that is also to be protected to the equipotential bonding. We therefore recommend routing the PE connection of the surge arrester along the shortest path to the same PE terminal block to which the protective earth conductor of the power supply unit to be protected is connected (if it is such a power supply unit).
    The same applies if the shield of the bus cabling (usually not recommended, but may be partially useful for interference suppression) has been connected to PE. In this case, the PE of the surge arrester should be routed to the same PE terminal block to which the shield has been connected. Such shield connections should be tied over the entire shield circumference with special clamps; the often braided braids are electrically unfavourable for discharging transient overvoltages).
  2. Ordentliche Arbeitsweise: Führen Sie den PE-Anschluss bitte mit größter Sorgfalt aus. Verquetschen Sie ausschließlich diejenigen Leiterklassen im richtigen Querschnitt, die für den verwendeten Quetschkabelschuh jeweils zugelassen sind und verwenden Sie hierfür nur die korrekte Quetschzange (wenn Sie den mitgelieferten Quetschkabelschuh verwenden. lesen Sie bitte in den technischen Daten nach). Schrauben Sie die Mutter am Anschluss gut fest (Anzugsmomente in den technischen Daten beachten). Verlegen Sie die Leitung auf dem kürzesten Weg zum PE-Klemmenblock und schrauben Sie die Leitung auch dort ordentlich fest (Angaben des Klemmenherstellers beachten, insbesondere zum Gebrauch von Adernendhülsen und zu den für diese Klemme erlaubten Querschnitte). Vermeiden Sie es unbedingt, im Gebäude eine räumliche Schleife zu bilden (um Induktion bei Blitzschlag zu vermeiden) und wickeln Sie keinesfalls die PE Leitung um etwas herum (keine Spule bauen). Es ist wichtig, dass diese Anschlüsse mechanisch fest, dau
  • I have external lightning protection, do I need this BlitzART surge arrester at all?
    Yes, absolutely. If external lightning protection ("lightning conductor") is present, additional internal lightning protection is always required (in accordance with the relevant standards). After all, the lightning is conducted from the lightning conductor directly via the foundation earth electrode into the building onto the equipotential bonding rail. From there, the overvoltage attempts to pass through to all neighbouring metallic conductors with a lower potential. Only internal lightning protection prevents this by short-circuiting all metallic conductors to each other. This BlitzART surge arrester is an important component of such internal lightning protection at level C2 / Type 2 and takes over this task for the 1-wire bus and PBM / server. This is a supplement to the coarse and medium protection according to Type 1 and Type 2, which must also be installed, and which must be installed by an expert for lightning protection systems.
  • Isn't surge protection built into the 1-Wire units?
    Not always. There is no room for surge protection in sleeve sensors and ceiling sensors; only our products based on circuit boards have surge protection diodes. However, these are not capable of carrying lightning currents and also have no connection to PE, so they can only compensate for transverse voltages, but not longitudinal voltages. This protects internal components, but not the insulation of the 1-Wire bus lines. Other manufacturers and practically all Maker projects of 1-Wire modules also do without surge protection diodes. This BlitzART surge arrester can dissipate about fifty times what the small protection diodes in devices can achieve (if present) - plus also towards PE.
  • When does the BlitzART 1-Wire PBM surge arrester trigger?
    The fine stage starts to conduct from about 6 V, the gas voltage arresters ignite from about 150 V and a rate of voltage rise that is typical for overvoltage events with a correspondingly steep rising edge. The overcurrent limiters are effective from 50 or 200 mA (depending on the conductor).
  • Is a BlitzART surge arrester destroyed by lightning?
    No, usually not, this module is capable of carrying lightning currents up to 5,000 amps. If this should ever happen, please let us know, we will certainly find an accommodating compensation.


Surge arrester type 2 for the Professional Busmaster (PBM) with three-stage protection system with disconnection of the current flow to the equipment side and additional functional stage for optimisation of the range.

This surge arrester can discharge 5,000 amps (8/20 µs, pulse category C2, fast rising edge). In addition, this protection system is equipped with the innovative ElabNET Current-Cut technology (self-resetting high-speed fuse 1µs), which provides additional protection even against low overvoltages (e.g. short-circuit with 24 V due to wiring error).

This BlitzART protection system is thus a combined protection system consisting of a very powerful type 2 surge arrester plus a very sensitive overcurrent protection (50 or 200 mA / 1 µs). The overcurrent protection switches off an overcurrent to the unit side within one microsecond. The reset after the overcurrent event takes place automatically within one millisecond.

This short-circuits overvoltages, compensates for potential differences and additionally separates remaining overcurrents. Due to this special combination, the achievable device protection is better than conventional protection systems without this third protection level.

Intended use / area of application / intended use:

This 1-Wire surge arrester of category C2 / Type 2 according to IEC 61643-21 is intended for installation in distribution cabinets and junction boxes in dry residential and business premises, control cabinets in industry and automation systems. It serves as a surge arrester between electrical conductors of the 1-Wire bus system and the equipotential bonding rail in case of direct and near lightning strikes as well as overvoltages from switching operations and discharges the partial lightning current into the earthing system. We recommend the combination with a surge arrester for power networks Type 1 and Type 2 as well as the use of several of these 1-Wire BlitzART modules in the 1-Wire system.

This module is designed for 1-Wire bus systems with the ElabNET Professional Busmaster or with the Timberwolf Server of the models 350Q, 950Q, 960Q as well as 3500 (all variants).

  • Surge protection device as part of the internal lightning protection for 1-wire bus systems
  • Arrester for overvoltages from galvanic, inductive and capacitive coupling as a result of close lightning strikes (atmospheric overvoltage)
  • Arresters for overvoltages due to distant lightning strikes (e.g. in transmission networks)
  • Arresters for overvoltages due to switching operations in low-, medium- and high-voltage networks (switching overvoltage)
  • Self-resetting, fast-acting overcurrent protection device, thus protection also against low overvoltages (e.g. 12 V on the bus-side connections in case of incorrect wiring)

Note: This module has three protective effects, which differ depending on the connection side. The power stage acts on the bus side of the module and can compensate or discharge 5,000 amperes. Both connection sides are connected via a three-pole overcurrent protection stage. The downstream fast fine stage initially acts on both connection sides at the beginning of an overvoltage event; after activation of the overcurrent protection stage, the current flow between both sides is limited, so that the voltage compensation of the fine stage only has an effect on the device side (as long as the event lasts) and reduces the terminal voltage there again.

  • Bus side: After all three protection stages have tripped, the gas voltage arresters act on the bus side and equalise up to 5,000 amperes.
  • Device side: After all three protection stages have been triggered, the overcurrent protection reduces the current flow between both sides to 50 or 200 mA per path, the fine stage on the device side reduces the protective voltage to 10 V.

Note: For 1-Wire bus systems with other bus masters (e.g. Maxim DS9490R, Loxone 1-Wire Extension) we offer an optimised protection module with included BusBoost and bandpass for optimum range.

Overview of the included protection technologies

  • Scope of protection: Three-stageprotection of the connected devices and power supplies as well as the insulation of lines against overvoltage from near and far lightning strikes, against overvoltages from switching operations as well as protection between bus and device side against overcurrent from as little as 50 or 200 mA. This also limits equipotential bonding currents via bus and GND lines.
  • Total number of protection sections: 24 protection and flashover sections
  • Number of gas voltage arresters: Six flashover arresters via two double-chamber gas voltage arresters (specified by the manufacturer with up to 20,000 amperes).
  • Number of diodes / TVS diodes: A total of 15 diode protection paths, including three parallel ultra-fast TVS protection diodes (reaction time a few dozen picoseconds).
  • Number of current limiters: Three overcurrent protection paths with fast, self-resetting current limiters (limiting in 1 µs, resetting 1 ms)
  • Type of surge arrester: Type 2
  • Certified current discharge: 5,000 amps at 8/20 µs (increased current load according to pulse class C2, fast rising edge)
  • Low-impedance PE connection: Cold-welded PE connection with low contact resistance, pre-assembled with washers, spring washer, nut and crimping cable lug for uncut connection to equipotential bonding up to 2.5 mm².
  • Overcurrent protection: Current-Cut technology, based on three ultra-fast, self-resetting current limiters in all three line paths, tripping at 50 / 200 mA within 1µs, limits the current flow between bus and equipment side of the protection module and allows a protection level below 10 V on the equipment side of the module
  • Automatic reset: reconnection between bus and equipment side within 1 ms after overvoltage or overcurrent event
  • PE connection: Pre-assembled with washers, spring washer, nut and crimp cable lug (DIN 46234) for connection to equipotential bonding up to 2.5 mm².

Operating range

  • Nominal voltage 1W against GND: 5 V
  • Maximum continuous voltage 1W to G ND: 6 V
  • Rated voltage1W to GND: 5 V
  • Highest continuous voltage 5 V to GND: 6 V
  • Leakage current 1W to GND: < 5 µA
  • Leakagecurrent 5 V to GND: < 5 µA
  • Insulation resistance at highest continuous voltage: > 1 MOhm
  • Capacitance 1-wire to GND: 60 pF

Protection level (at overvoltage 10,000 V and 5,000 Amps)

  • Data lines, 1W against GND: < 527 V (at pulse class C2, 10,000 V (1.2/50 µs) / 5,000 A (8/20 µs) - but only for 1 µs on the unit side
  • Data lines, 5 V against GND: < 555 V (for pulse class C2, 10,000 V (1.2/50 µs) / 5,000 A (8/20 µs) - but only for 1 µs on the unit side
  • After current limiting: This protection level is reduced to below 10 volts on the unit side after about 1 µs (due to current cut)
  • Pulserecovery, 1W against GND: <1.01 ms (measured at 2,000 V (1.2/50 µs) / 1,000 A (8/20 µs))
  • Pulse recovery, 5 V to G ND: <1.07 ms (measured at 2,000 V (1.2/50 µs) / 1,000 A (8/20 µs))
  • Currentlimitation with current-cut GND line: 200 mA (between bus and unit side)
  • Current limitation withcurrent-cut 5V line: 200 mA (between bus and device side)
  • Current limitation with current-cut 1-wire data: 50 mA (between bus and device side)

Test standards and certification

  • Certification: According to EN 61643-21:2001 + A1:2009 + A2:2013: according to pulse class C2 at 10 kV (1.2/50 µs) / 5 kA (8/20 µs)
  • Test laboratory: DEHN Prüf- und Testzentrum, Neumarkt, accredited according to DIN EN ISO/IEC 17025:2018 by the German Accreditation Body DAkkS

Connections on bus side

  • Bus: triple plug-in terminal Wago 243 with four connections each per potential and test opening
  • Permissible conductor class: solid conductor with diameter 0.6 - 0.8 mm (conductor class 1 according to DIN/IEC 60228)
  • Stripping length: 5-6 mm
  • Overvoltage protection: The overvoltage protection by short-circuiting acts against the bus side of the module or PE, the device side is additionally disconnected by the overcurrent protection.

Connections on the unit side

  • Bus: triple plug-in terminal Wago 243 with four connections each per potential and test opening
  • Permissible conductor class: solid conductor with diameter 0.6 - 0.8 mm (conductor class 1 according to DIN/IEC 60228)
  • Stripping length: 5-6 mm
  • Overcurrent protection: The current-cut overcurrent protection limits the current on the three lines between the bus side and the device side of the module

Potential equalisation connection

  • PE connection: Low-impedance connection between module and lightning current equipotential bonding by means of cold-welded connection terminal, spring-loaded screw connection, gas-tight crimped cable lug and uncut cable routing with 2.5 mm².
  • Connection terminal: Terminal with very high current carrying capacity, best long-term reliability due to permanently gas-tight connection of the terminal to the assembly by 36 homogeneously cold-welded contact points with a pull-out force of 900 N, thus low contact resistance with < 200 µOhm,
  • Screw connection: pre-assembled connection with washers, spring washer, nut and crimp cable lug (according to DIN 46234)
  • Crimpable conductor class: For the supplied crimp cable lug, please use only stranded, fine-stranded or fine-stranded conductors with 2.5 mm² (conductor classes 2, 5 and 6 according to DIN/IEC 60228, our recommendation: H07V-K2.5 gn/ge)
  • Crimping pliers: For the supplied crimping cable lug, please use only crimping pliers for uninsulated crimping cable lugs according to DIN/IEC 46234.
  • Stripping length: 5 mm
  • Connection thread: M3
  • Maximum tightening torque: 0.5 N m
  • Breaking torque of grub screw: 1.5 N m

Notes on using other crimping cable lugs: Instead of the crimping cable lug supplied, you can also use other crimping cable lugs if you want to connect with a larger cross-section or want to use a solid conductor. Pay attention to the hole for M3. Crimping cable lugs with 4 and 6 mm² are available commercially for this purpose. Please ensure that you use the correct crimping pliers for the respective crimping cable lug.

Protection class module

  • Protection class: III / SELV (according to EN60730)
  • Protection class: IP 00 (according to EN 60529)


  • Construction: Open REG housing
  • Mounting: This surge arrester is intended for fixed mounting on the top-hat rail in distribution boards inside buildings (DIN Rail 35 mm according to EN 50022)
  • Ambient temperature: -20°C to +70 °C
  • Humidity: < 98% rH (without condensation)
  • Mounting: DIN Rail 35 mm (EN50022)
  • Material housing: Polyamide
  • Colour: Green
  • Dimensions: 76 mm x 22.5 mm x 40 mm (l x w x h with housing)
  • Weight: 39 g (with housing)

<h2 style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0.5rem; line-height: 1.1; font-size: 1.8rem; font-family: Custom-Font, Lato, sans-serif; letter-spacing: 0.5px; background-color: rgb(255, 255, 255);"><span style="font-size:28px;"><span style="box-sizing: border-box; color: rgb(85, 85, 85);"><span style="box-sizing: border-box;">SCOPE OF DELIVERY</span></span></span></h2> <p style="box-sizing: border-box; margin-top: 0px; margin-bottom: 1rem; font-family: Custom-Font, Lato, sans-serif; font-size: 14px; letter-spacing: 0.5px; background-color: rgb(255, 255, 255);">&nbsp;</p> <p style="box-sizing: border-box;"><span style="box-sizing: border-box; font-weight: bolder;">12 x Art-No: 451:&nbsp;</span>Surge arrester for 1-Wire Professional bus master - 5000 amps (Type 2)</p> <ul> <li style="box-sizing: border-box;"><strong>Design: </strong>Module with open REG housing</li> <li style="box-sizing: border-box;"><strong>Mounting on DIN rail: </strong>Ready mounted with base for DIN rail</li> <li style="box-sizing: border-box;"><strong>Terminals</strong>: ONE set of terminals for 1-Wire (one pair each of bus terminals bl/gr/or)</li> <li style="box-sizing: border-box;"><strong>PE connection: </strong>Pre-assembled with washers, spring washer, nut and crimp connector for 2.5 mmu00b2.</li> <li style="box-sizing: border-box;"><strong>Quantity according to order, please also note our SparPacks and SuperSparpack</strong></li></ul>