World’s thinnest surge protection for measurement and control signals

TERMITRAB Complete provides the right surge protection for all requirements.

TERMITRAB Complete is the world's narrowest surge protection for MCR technology. Our product range includes a complete system kit, covering everything from simple, single-stage surge protection to multi-stage, pluggable versions with knife disconnection, signaling, and the option of remote signaling.

With a world-leading, narrow width of just 3.5 mm, TERMITRAB Complete gives you a space savings of up to 50 percent, when compared with 7-mm installations.

The protective devices in the TERMITRAB complete range provide mechanical signaling that displays device status with no need for additional auxiliary power. 

Optional remote signaling modules visually monitor up to 40 protective devices. In the event of a thermal overload, for example, these remote signaling modules could notify your control room of system status with a group message via a floating contact.

Rotate the TERMITRAB complete in all directions. For a more immersive experience: On desktop, scan the QR code, or using a compatible mobile device, tap 'View in my space'.

Your advantages:

  • The world's narrowest surge protection from an overall width of just 3.5 mm
  • Versatility: designs and connection technology adapted to the application
  • Easy testing, thanks to pluggable version of surge protective devices
  • Easily incorporate overcurrent protection with fuse holder accessory
  • Hazardous location options available, triple rated for CID2, ATEX and IECex

Extremely narrow overall width

Build smaller panels by using the narrowest surge protective device starting from 3.5 mm.

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Push-in or screw connection

The choice is yours: Push-in or screw connection technology.

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Pluggable and testable surge protection

Check and document the status of pluggable surge protective devices with CHECKMASTER 2.

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Hazardous location approvals

Utilize hazardous location rated (ATEX, IECEx, Class I, Division 2) versions for demanding environments.

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Fuse holder accessory

The fuse holders accepts standard 5x20 mm miniature fuses. They are UL 497B Listed including the Class I, Division 2 Approval for hazardous locations.

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Knife disconnection

Simplify your maintenance work by means of the integrated, innovative knife disconnection.

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Overload protection and status indication

Local status indication saves time through quick identification of SPDs requiring replacement.

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Remote signaling option

Along with local status indication, remote signaling makes for a powerful tool to combat downtime.

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Digital signals and switching contacts

The difference between analog signals and binary signals, or switching contacts, is that only one concrete signal status is transmitted. Surge voltages can, however, interfere with the transmission of statuses, which in turn results in system errors. The right surge protection protects your signal transmission and ensures that your system keeps running.

Switching states and signal contacts are typical signals that are recorded with the binary inputs on controllers. The controllers also switch actuators such as solenoid valves. Use suitable surge protection to protect the sensitive inputs and outputs on controllers. Individual binary signals are often connected against a common reference potential. Typical arrangements that take into account this common reference potential are provided by so-called 2x1 or 4x1 circuits.   

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Analog signals and current loops

Analog signals and current loops  

4-wire surge protection device

Analog signals and current loops are used frequently in measurement and control technology. Integrate these signals into a surge protection concept. The new, ultra-narrow TERMITRAB Complete surge protective devices provide your signals with optimum protection starting from an overall width of just 3.5 mm.

Analog measured variables—speed, pressure, flow, etc.—are recorded by sensors and converted into current or voltage values by measuring transducers. They are transmitted to the controller or the isolator module within a standardized value range. The “1x2 circuit” is typically used for this type of analog transmission method.

The ”1x4 circuit” surge protection is ideal for 4-conductor measurement applications, including temperature and weight. These surge protection devices consist of protective plug and base element, with integrated status indicator for high current 4-wire signal circuits.

Transient coupled-in surge voltages can cause damage to the field device and centrally. Both of these end points require surge protection.

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Fuse holder accessory

The TTC-6-FC-UT fuse holder expands the function of the narrow surge protective devices from the TERMITRAB Complete (TTC) product family. The fuse holder is compatible with existing TTC products with screw connection. With the new fuse holders, both overvoltage protection and modular overcurrent protection can be implemented over a width of only 6 mm.

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Potentially explosive applications

Specific ambient conditions place special requirements on surge protection. Surge protective devices for potentially explosive applications provide the right protection for ensuring maximum availability in sensitive areas.

The chemical and petrochemical industries involve industrial processes that produce explosive atmospheres. They are caused, for example, by gases, fumes, or vapors. Explosive atmospheres can also occur in mills, silos, sugar, and fodder factories due to the dust present there.

Hazardous locations

Surge protective devices for the Ex area are subject to specific conditions. The products meet specific requirements for the intrinsic safety type of protection. All surge protective devices are assigned to the “Ex ia” category for intrinsically safe circuits and provide maximum safety. In this category, the equipment must not be capable of causing ignition, even in the event of two independent faults.

It can be installed in Ex Zone 1, Ex Zone 2 or in the non-Ex area. The connected signals can be forwarded through to Ex Zone 0. Some products also meet the requirements of the pressure-tight encapsulation type of protection. Approvals are granted according to ATEX and IECEx.

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TERMITRAB complete application guide

Internal Circuit Diagrams & Connection of Conductors and Shields

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586 Fulling Mill Road
Middletown, PA 17057
(800) 888-7388


TERMITRAB Complete Overview

Surge protection system for MCR applications


Configure products and solutions for your individual application.

Surge protection for measurement and control technology
Surge protection for measurement and control technology

TERMITRAB Complete TTC 6P-4 brochure

Surge protection for 4-wire measurement applications

TERMITRAB Complete TTC 6P-4 brochure
Download brochure [PDF, 5.36 MB]