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Surge Protection

• For nominal voltages 120V to 600V • Discharges up to 40kA (8/20μs) • 1, 2 and 3 phase configurations • UL1449 Edition 3 approved • Integral thermal disconnects • Pluggable replaceable SPD elements • Local and remote SPD status indication


Weidmuller has extended its line of Surge Protection devices to include a new line of signal, data, and power protection devices.



Circuit and Surge Protection Catalog Flipbook Download


SPD Series: DIN-Rail Mountable Surge Protection Family

Weidmuller’s SPD II 1 series transient voltage surge protectors consist of a range of innovative, compact modules for the protection of low voltage AC distribution systems or (PV models) for DC photovoltaic installations. Each module is a two-part construction, comprising a TS35 DINrail mountable base and a pluggable replaceable arrester, with each single-conductor assembly only 18mm wide.



VARITECTOR: For Instrumentation, Control & Automation Circuits

With the VARITECTOR Weidmuller offers a new family of surge protection devices for control and instrumentation (C&I) applications.  Long cable runs from the field to the controls need protecting on against electrical surges, caused by remote lightning strikes. These surges can distort signals and damage connected devices. Varitector allows users to ensure their controls and I/O devices are protected from lightning induced surges in cables.


Main Varitector features:

  •  Choice of pluggable/replaceable (VSPC) or high density (VSSC) construction
  •  Protection for Analog, Digital I/O signals (incl. high current), Fieldbus, sensors, Tele UKO 
  •  Integral mounting rail connection creates ground circuit
  •  No individual ground wiring simplifies cabling
  •  200 x VSPC/VSSC range variants
  •  Local and remote arrester status indication options (VSPC)
  •  Local arrester status options (VSSC6)
  •  Hazardous area approvals permits mounting in Division 2 or Zone 2 locations
  •  Approved for mounting in SIL safety circuits.
  •  UL & CSA approved

VSPC – Pluggable, replaceable arresters

With the VARITECTOR VSPC, Weidmuller offers protection for up to 4 conductors in one pluggable arrester, plus a dedicated terminal for cable shield connections, which if used provides a path to ground via the Din mounting rail.


Optional remote status signaling is offered by using a Control Unit in conjunction with models with ‘R’ in the descriptor. Each Control Unit can be connected to a group of up to ten VSPC ‘R’s.

VSSC – High density, terminal-type arresters

VSSC4 is the 4-terminal range which provides basic protection functions for single and two conductors, where the cable shield is separately connected to ground.


VSSC6 is the 6-terminal range which includes spare terminals to connect the cable shield and provide a ground path via the Din mounting rail. In most models, options are available for displaying arrester status via an integral LED.

V-Logger 30 – Portable transient logger

V-Logger 30 is a battery powered logger of surge events. Easy to install, and then later move to other locations, with it’s clamp-on sensor, the V-Logger can be used to detect transient surges (>50A) and date/time-stamp them for later analysis.


Typical applications include monitoring ground cables, or a.c. voltage network cabling, to detect the effects of remote lightning strikes or surges due to machinery or switchgear.


Surge Protectors with UL Approval

  • Fully supports U.S. standard network types and voltages – single-, two- and three-phase systems.
  • Flexible mounting options.
  • Arrestor locking mechanism provides reliable operation under heavy-duty conditions.
  • Pluggable arrestor units provide fast and easy replacement without the need of tools.
  • Centralized and wide control window.
  • Optional remote signaling contact.
  • Fast DIN-rail mounting by means of special mounting clip.
  • Rotatable product design.
  • Approvals: CE and  UL 1449 Edition 4 Certification (IEC 61643-11:2011, EN 61643-11:2012)




SD Series: Data and Signal Protection

The SD Series are user-friendly devices for protecting electronic equipment and systems against surges on signal and I/O cabling. The exceptionally high packing densities are the result of an ultra slim footprint for individual modules, which can double-up as feedback terminals. Each module provides full hybrid surge protection for 2 and 3-wire loop protection.



SLP Series: Transmitter and Sensor Protection

The SLP Series provides 20kA power surge protection for process control, equipment systems and distribution panels. The multi-stage hybrid surge protection network at the heart of the SLP uses a combination of solid state electronics and a gas filled discharge tube (GDT) to provide surge protection up to 20kA. This impressive surge protection circuit is designed to exhibit exceptionally low line resistance and adds only a minimal voltage drop to the circuit.



MA15 Series: AC & DC Power Protection

The MA15 Series of surge protection devices protects electronic equipment and computer networks against the effects of noise pollution induced in power supplies. MA15 units filter out and suppress the effects of industrial noise and surges caused by lightning, switching devices, thyristor controls, transmission system overloads and power-factor correction circuits.



TP48 Series: Transmitter and Sensor Protection

The TP48 Series of transmitter protectors safeguards electronic process transmitters against induced surges and transients from field cabling. They uniquely provide a level of protection for 2, 3 and 4 wire fieldmounted transmitters that greatly exceeds the optional transient protection facilities available from the transmitter manufacturers without any additional wiring, conduit modifications or other expensive extras.