BlitzART - with MORE protection

Because several times is better

Protection modules with two to four levels - for more functions

Lightning protection

up to 5,000 amps and 10,000 volts

Short-circuit protection

No defect after incorrect wiring

Overcurrent protection

Extended device protection

Signal enhancement

Reach optimisation

Coarse protection with gas discharge tubes

Full throttle with the first stage - up to 20,000 amps

Gas-filled spark gaps are the kings among arresters.

This is the best way to compensate for enormous amounts of electricity.

So that BlitzART surge arresters can discharge powerful lightning currents, we have installed strong switching elements for you. The highest performance is achieved with gas-filled flashover arresters.

And to ensure that all constellations are covered, BlitzART modules are even equipped with three to six such flashover sections.

No matter between which connections overvoltages occur - BlitzART modules safely dissipate them.

Subtleties can be decisive

With the second one you protect better

That's why we switch a fine stage parallel to the coarse one: it's not only 1000 times faster, it also really pulls everything down again.

The fine stage quarters the residual voltage of the coarse stage. Because the current is also quartered, this means that the load on your equipment is reduced to one sixteenth. The much faster switching of the second stage provides additional relief, so that one can roughly say that our two-stage arresters provide about 20 times better protection than if we had only designed our arresters conventionally - i.e. single-stage.

Everything well secured

We rely on resistance - so that you can stay relaxed

Better separated quickly than balanced for a long time. This is the third stage.

Ultra-fast overcurrent protection switches in 0.000001 seconds.

We call the third stage "CurrentCut" because the name says it all. The current flow is cut off - in the middle of the module - within a millionth of a second. This provides almost brutal protection against lightning strikes. For each signal individually. Your devices will not notice the inferno on the other side of the module.

But CurrentCut can do even more. It also protects against short circuits and equalising currents caused by ground loops. Sounds boring, but in fact faulty wiring is the real killer in bus systems. Now you can also protect your valuable devices from this. At no extra charge. Lightning protection with free extra. You're welcome.

Move on

More range for 1-Wire bus systems

For 1-Wire we add something more. More range.

The 1-Wire BlitzART modules have a fourth stage. This contains signal conditioning with bandpass filters and the ElabNET BusBoost circuit. So that you can extend the length of the 1-Wire bus.

Optimised for the Loxone 1-Wire Extension and the Maxim Busmaster DS9490R.

You will benefit from this

You will see, there is more to it

Lightning protection

Powerful internal surge protection against atmospheric discharges. Regardless of whether the lightning strike is close or far away, whether the voltage is longitudinal or transverse and regardless of the polarity. The BlitzART modules protect digital bus systems in all these cases and in every combination simultaneously.

We have chosen the best design for you. State-of-the-art elements, arranged in two or even three stages, for the most effective equalisation of partial lightning currents and maximum voltage reduction.

BlitzART Module gleichen bis zu 5.000 Ampere aus. Mehrmals hintereinander. Und erreichen dabei sensationell niedrige Schutzlevel.

So that you can be sure, we have had this performance certified for you in high-voltage laboratories: According to DIN IEC EN 61643-21:2001 + A1:2009 + A2:2013 - Pulse class C2

Gas voltage arrester

Gas discharge tubes are (almost) ideal surge arresters. When not ignited, they have a very high impedance, practically no capacity and no influence on data transmission.

Mit dem Durchzünden reduziert sich der Widerstand schlagartig, womit diese Entladungsröhren enorme Strommengen abführen können.

In BlitzART surge arresters, we use double-chamber gas arresters from leading brand manufacturers that ignite in less than 0.000000075 s and can conduct up to 20,000 amps.


Ultrafast TVS diode

Surpressor diodes are the specialists among surge protection elements and are characterised by an extremely short response time and low protection levels.

The bidirectional TVS diodes used in BlitzART respond about 1,000 to 10,000 times faster than gas arresters - at significantly lower voltages. We use these TVS diodes as the second stage.

BlitzART surge arresters thus react in about forty trillionths of a second. This is about 30,000 times shorter than the surge wave of the voltage needs to reach its maximum rise (about 1.2 µs).

For the reaction time, you can also simply say: immediately.

Two-level protection

Overvoltages from lightning are caused by the voltage drop across the path that the lightning current takes between the sky and the ground. By activating several tracks in parallel, the BlitzART modules offer the partial lightning current a highway to compensate. The faster and wider, the lower the voltage drop and the more your equipment and insulation are protected.

That's why our two-stage modules are equipped with five protection and flashover connectors - consisting of strong gas discharge tubes and ultra-fast TVS diodes. So we combine fast with strong.

Because of this two-stage cascade and because of the particularly low-impedance PE connection, the protection of the bus system or the power supply is improved by a factor of about 20 compared to a single-stage design with conventional PE connection.

Superfast fuse

An electronic fuse interrupts the current flow when a certain amount of current is exceeded and then switches back automatically.

We use such fuses in the three-stage modules to disconnect the signals between the two connection sides in case of overvoltages or overcurrents.

The reaction time of this electronic fuse is only one millionth of a second. Nothing can get through that quickly.

This also protects against the consequences of miswiring and short circuits. There is no better protection, which is why we have integrated it into our three- and four-stage products.

Three-tier protection

There are two ways to manage surges: Equalise or stop.

With the three-stage modules, we implement both.

At the beginning of the surge event, a massive equalisation is switched between the involved conductors. Only one millionth of a second later - and thus during the rise of the surge wave - the superfast fuses disconnect the signal lines between the bus and the device side, so that the lightning current can no longer seek a path through the devices behind it.

With outstanding results: While an overvoltage of 10,000 V on the bus side of the module is compensated with 5,000 amperes - and already reduced to approx. 600 V - the protective module achieves a reduction of the voltage on the device side to below 10 V through the partitioning - in conjunction with the fine protection of the second stage.

10,000 V thus becomes 10 V. That is an elimination of 99.9%. That's what we call art with lightning. Or BlitzART.

Low impedance connection

Lightning surge currents must be able to flow with as little resistance as possible, because the damaging overvoltages occur as voltage drops across the line resistances. BlitzART modules are optimised for this.

Usual screw or clamp connectors would contact a conductor only at two narrow strips. This is not very suitable for high-frequency and massive surge currents because of the skin effect. That is why BlitzART modules are equipped with spring-loaded screwed ring cable lugs.

The crimp connection contacts the PE conductor over the entire circumference and welds itself to the cable lug. Correctly executed, such a connection is permanently gas-tight and reliable. After all, you don't know whether lightning will strike today or in twenty years.

The terminal block made of solid material is also contacted to the circuit board via 36 cold-welded connections. This achieves a sensationally low 200 µOhm.

Finally, this design allows connection with high cross-sections from 2.5 mm² to 6 mm² - and uncut cable routing to the PE terminal.

Overall, this achieves a reduction of the voltage drop by 85%, which further improves the protection level for the bus and power supplies to be protected.

We offer ready-made connection cables as accessories in the shop.

Surge protection

The real killer for digital bus systems is faulty wiring.

A small mix-up when clamping can happen quickly. If a voltage of only 12 or 24 V is clamped to a data line, this destroys devices in seconds. In practice, such destructions due to incorrect wiring occur ten times more frequently than due to lightning strikes.

Common arresters designed only for lightning surges either do not react to such low voltages or are destroyed themselves. This is because lightning surges rarely last longer than a hundred millionths of a second. Faulty wiring, on the other hand, remains connected for minutes to days. After just a few seconds, components of conventional surge arresters would melt.

We have also solved this challenge: with the third-stage automatic fuses (described above). These disconnect the connection between the bus and the device side at currents of 50 or 200 mA (depending on the module type / signal line).

An overvoltage of 24 V on the bus side of the module can thus be withstood for any length of time; the fuse simply remains open automatically for that long. Simple and effective. This also helps to improve the protection level in the event of a lightning strike.

We call this technology "CurrentCut". This eliminates the most common cause of damage and protects your valuable equipment.


Overcurrent protection

Ground loops are particularly treacherous because they are difficult to detect. In this case, signal lines or connected devices are connected to PE at at least two points in the building. Difficult to detect because this is often done indirectly through the electronic circuitry inside the devices, via earthed housing masses or applied shields. Even small differences in potential can cause considerable currents of several amperes.

Such compensating currents of ground loops interfere with data transmission quite considerably by raising the ground and destroy conductor paths and filter components.

The "CurrentCut" protection circuit in our three- and four-stage modules also protects against these ground loops. That is why we have also looped in the automatic fuses between the connections for the signal grounds in the BlitzART modules. Especially for counteracting high equalising currents of ground loops.

Short-circuit protection

Short circuits are also a consequence of incorrect wiring. Interfaces of some units can already be damaged by a simple short circuit of the connecting cables.

The CurrentCut automatic fuses of the three- and four-stage modules of the BlitzART modules also protect against the consequences of short circuits here.

Interference protection

1-wire bus systems require particularly little energy for function and data transmission. Low-voltage lines running in parallel can cause interference that can be limited with band-pass filters.

This filter is included in the four-stage modules for 1-Wire.

ElabNET also offers such filters separately for installation in the 1-Wire bus cabling.

Range increase

The range in 1-wire bus systems is determined by the bus master and can range from 10 metres to 400 metres.

Especially for the Busmaster DS9490R from Maxim as well as the Loxone 1-Wire Extension, we have developed a circuit with which an increase in range is possible and which we call "BusBoost".

BusBoost is included in the BlitzART 1-Wire module - together with the band-pass filter for interference protection.

BlitzART protection modules (overview)

KNX / Hilfsspannung

  • 1.000 Ampere (8/20 µs)
  • Type 3 / Impulsklasse C2
  • Zweistufiger Ableiter
  • 5 bidirektionale Schutzstrecken
  • Schutzpegel < 220 V (sw / rt)
  • Kapazität 1 nF

RS-485 / RS-422 / DMX / Modbus RTU

  • 5.000 Ampere (8/20 µs)
  • 10.000 Volt (1,2/50 µs)
  • Type 2 / Impulsklasse C2
  • Dreistufiger Ableiter
  • 11 bidirektionale Schutzstrecken
  • Schutzpegel Busseite < 616 V
  • Schutzpegel Geräteseite < 10 V
  • Kapazität 75 pF
  • CurrentCut 200 mA


  • 5.000 Ampere (8/20 µs)
  • 10.000 Volt (1,2/50 µs)
  • Type 2 / Impulsklasse C2
  • Dreistufiger Ableiter
  • 12 bidirektionale Schutzstrecken
  • Schutzpegel Busseite < 443 V
  • Schutzpegel Geräteseite < 10 V
  • Kapazität 400 pF
  • CurrentCut 200 mA


  • 5.000 Ampere (8/20 µs)
  • 10.000 Volt (1,2/50 µs)
  • Type 2 / Impulsklasse C2
  • Dreistufiger Ableiter
  • 11 bidirektionale Schutzstrecken
  • Schutzpegel Busseite < 606 V
  • Schutzpegel Geräteseite < 10 V
  • Kapazität 75 pF
  • CurrentCut 200 mA

1-Wire Loxone Extension

  • 5.000 Ampere (8/20 µs)
  • 10.000 Volt (1,2/50 µs)
  • Type 2 / Impulsklasse C2
  • Vierstufiger Ableiter
  • 24 bidirektionale Schutzstrecken
  • Schutzpegel Busseite < 521 V
  • Schutzpegel Geräteseite < 10 V
  • Kapazität 60 pF
  • CurrentCut 50 mA
  • Bandpass Filter als Störschutz
  • BusBoost für optimale Reichweite

1-Wire Professional Busmaster

  • 5.000 Ampere (8/20 µs)
  • 10.000 Volt (1,2/50 µs)
  • Type 2 / Impulsklasse C2
  • Vierstufiger Ableiter
  • 24 bidirektionale Schutzstrecken
  • Schutzpegel Busseite < 521 V
  • Schutzpegel Geräteseite < 10 V
  • Kapazität 60 pF
  • CurrentCut 50 / 200 mA
  • Bandpass Filter als Störschutz