Protection Module for DEHNrail modular, Pluggable Protection Module for Type 3 Arresters, module chống sét cấp 3, DEHN, Hahitech
Type 3 arresters are typically used for protecting terminal equipment. Different types of enclosures allow easy installation close to terminal equipment.
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DEHNrail modular
Modular two-pole surge protective device with a functional design.For protecting the power supply circuit of industrial electronics equipment against transient surges in switchgear cabinets.
Pluggable two-pole Surge Arrester
Two-pole surge arrester consisting of a base part and a plug-in protection module
- High discharge capacity due to heavy-duty zinc oxide varistor / spark gap combination
- Energy coordination with other arresters of the Red/Line product family
- Operating state / fault indication by green / red indicator flag in the inspection window
- Narrow (modular) design according to DIN 43880
- Easy replacement of protection modules due to module locking system with module release button
- Vibration and shock-tested according to EN 60068-2
Version
DEHNrail M 2P ...: Two-pole surge arrester consisting of a base part and a plug-in protection module
DEHNrail M 2P ... FM: With remote signalling contact for monitoring device (floating changeover contact)
Details

The modular devices of the DEHNrail M product family stand out due to their high performance parameters and straightforward Red/Line design. The devices combine safety and ease of use in a single module. The low voltage protection level and the comprehensive protection against common-mode and differential-mode interference make them ideal for protecting terminal equipment in industrial electronics environments. The input and output terminals for series connection and the protective circuit designed for high load currents underline this concept.
The very compact design of the DEHNrail M surge arresters includes the fault-proof Y protective circuit and a combined SPD monitoring and disconnection device.
The base part and protection module are coded to ensure against installing an incorrect module.
The unique module locking system of the DEHNrail M product family fixes the protection module to the base part. Neither vibration during transport nor the electrodynamic forces of discharge can loosen the connection.
In the event of the protective circuit being overloaded, the protection modules can be easily replaced without tools by simply pressing the module release button.
In addition to the standard visual indication with green and red indicator flags, DEHNrail M ... FM devices feature a three-pole remote signalling terminal. With its floating changeover contact, the remote signal can be used as a break or make contact according to the particular circuit concept.
DEHNrail modular, multipole
Modular four-pole surge protective device for protecting the power supply circuit of 230 / 400 V industrial electronics equipment against transient surges in switchgear cabinets.
Pluggable four-pole Surge Arrester
- Four-pole surge arrester consisting of a base part and a plug-in protection module
- High discharge capacity due to heavy-duty zinc oxide varistor / spark gap combination
- Energy coordination with other arresters of the Red/Line product family
- Operating state / fault indication by green / red indicator flag in the inspection window
- Easy replacement of protection modules without tools due to module locking system with module release button
- Nominal load currents up to 25 A
- Vibration and shock-tested in accordance with EN 60068-2
Version
DEHNrail M 4P ...: Four-pole surge arrester consisting of a base part and a plug-in protection module
DEHNrail M 4P ... FM: With remote signalling contact for monitoring device (floating changeover contact)
Details
The modular four-pole DEHNrail M 4P ... (FM) surge arresters are specifically developed for protecting three-phase industrial electronics terminal equipment. Adapted to this kind of environment, the arresters with the Red/Line design are suitable for 35 mm DIN rails. The low voltage protection level and the comprehensive protection against common-mode and differential-mode interference are characteristic of DEHNrail M 4P ... (FM). To provide optimal low voltage protection levels for the terminal equipment to be protected, the device features input and output terminals for series connection. DEHNrail M 4P ... (FM) devices ideally adapt to the cable run upstream of the terminal equipment. Therefore, no additional terminal blocks for outgoing cables are required. The compact design incorporates the tried and tested disconnector. It disconnects an overloaded arrester circuit without interrupting the supply circuit.
The base part and protection module are coded to ensure against installing the incorrect module.
The unique module locking system of the DEHNrail M family fixes the protection modules to the base part. Neither vibrations during transport nor the electrodynamic forces of discharge can loosen the connection.
In the event of the protective circuit, which is rated for high load currents up to 25 A, being overloaded, the protection modules can be easily replaced without tools by simply pressing the module release button.
Apart from the standard visual indication with green and red indicator flags, DEHNrail M 4P ... FM devices feature a three-pole remote signalling terminal. With its floating changeover contact, the remote signal can be used as a break or make contact according to the particular circuit concept.
Protection Module for DEHNrail modular
DR MOD…: Replacement protection modules for all devices of the modular DEHNrail series.
Pluggable Protection Module for Type 3 Arresters
- High discharge capacity due to heavy-duty zinc oxide varistor / spark gap combination
- High reliability due to "Thermo Dynamic Control" disconnector with dual monitoring
- Energy coordination with other arresters of the Red/Line product family
- Easy replacement of protection modules without tools due to module locking system with module release button
- Operating state / fault indication by green / red indicator flag in the inspection window
- The plug-in protection module can be replaced without the need to de-energise and without removing the distribution board cover
- Vibration and shock-tested in accordance with EN 60068-2
Version
DEHNrail MOD ...: For all types of two-pole DEHNrail M 2P ... surge arresters
DEHNrail MOD 4P...: For all types of four-pole DEHNrail M 4P ... surge arresters
Mains Filter
For protecting the power supply circuit of industrial electronics equipment (e.g. programmable logic controls (PLCs)) against high-frequency interference voltages.
NF 10
- Protection of sensitive industrial electronics equipment against balanced and unbalanced high-frequency interference
- For use in combination with surge protective devices, e.g. DEHNrail M 2P 255
- Easy installation on DIN rails in switchgear cabinets
Details
The NF 10 mains filter ideally complements surge protective devices for industrial terminal equipment. This DIN rail mounted device is perfectly suited for installation downstream of surge protective devices (e.g. DEHNrail M 2P 255). In addition to surge protection, protection against balanced and unbalanced high-frequency interference is provided. The separate input and output terminals of the mains filter ensure optimal protection of the equipment to be protected. Apart from surge protection, the mains filter also fulfils electromagnetic compatibility requirements in plant and control systems.
SPS Protector
For protecting the power supply circuit of 230 V industrial electronics equipment (e.g. programmable logic controls (PLCs)) against transient surges and high-frequency interference voltages.
Two-pole surge arrester with filter
- Combination of surge protection and filter
- Surge protection with monitoring device and disconnector
- Interference suppressor filter for protecting sensitive industrial electronics equipment against balanced and unbalanced high-frequency interference
- Integrated in a shielded enclosure
- Visual operating state indication (green) and floating remote signalling contact (break contact) for fault indication
Version
SPS Protector: Two-pole surge arrester with interference suppressor filter
Details
The SPS Protector combines surge protection and interference suppressor filter in a compact device. This makes it ideal for protecting sensitive terminal equipment of industrial automation systems (e.g. programmable logic controls (PLCs)). The coordinated surge protection and filter functions complement one another and prevent core saturation of the filter in the event of high-level transients. The separate input and output terminals provide optimal protection for the device to be protected. The metal enclosure of the SPS Protector ensures that high-frequency interferences are discharged without interfering with other devices in the immediate vicinity. The compact design of the SPS Protector already houses the proven disconnector. In case of overload, it disconnects the arrester without interrupting the power supply circuit. Apart from the green indicator light, SPS Protectors also feature a remote signalling contact.
DEHNsafe
For protecting terminal equipment against transient surges. For installation into electrical installation systems, e.g. cable ducts or flush-type boxes.
Surge Arrester for Use in Cable Ducts
- Two-pole surge protective device for 230 V terminal equipment
- For use in flush-type boxes and cable ducts
- Enhanced safety due to fault-proof Y protective circuit
- Multiple visual indicator
- Programmable acoustic function
- Terminals for series connection
- Independent of the socket outlet design
Version
DEHNsafe 230 LA: Surge protective device for use in cable ducts
Details
DEHNsafe surge arresters particularly stand out due to their flexible application options. Thanks to their small mounting depth of only 31 mm, the two-pole surge protective devices for 230 V terminal equipment can be installed both in cable ducts and in flat flush-type boxes. DEHNsafe incorporates a monitoring device and a thermal disconnector. In addition to a visual operating state indicator, the device features a programmable acoustic fault indicator which can be programmed for three different operating states:
– Acoustic fault indication,
– Test function,
– Muting of the acoustic signal.
DEHNsafe surge arresters are covered by a triple TAE cover from any switch range manufacturer, thus ideally adapting to any socket outlet design.
The double terminals for L, N and PE allow for series connection to ensure that the surge protective device is situated in parallel to the circuit to be protected. For this reason, DEHNsafe does not necessarily interrupt the circuit to be protected in case of overload. They feature a green and red LED for visual inspection.
Figure 1
NSM Protector
Earthed socket outlet with integrated surge protection for protecting electronic equipment against surges. For installation into electrical installation systems. German utility patent.
Socket Outlet with integrated Surge Protection
- Surge protection with monitoring device and disconnector
- Enhanced safety due to fault-proof Y protective circuit
- Visual operating state (green) and fault indication (red)
- With retaining ring (diameter of 60 mm) for installation in switch boxes with a diameter of 60 mm and a depth of 40 mm
Version
NSM Protector: Earthed socket outlet with integrated surge protection
Details
The devices of the NSM Protector family combine surge protection and earthed socket outlet in a single device. The two-pole surge arresters are specifically designed for protecting electronic loads in final circuits. Their very compact design incorporates the approved disconnector which disconnects overloaded surge arresters without interrupting the supply circuit. The low voltage protection level as well as the comprehensive protection against common-mode and differential-mode interference are typical of the devices of the NSM Protector family. The fault-proof Y protective circuit ensures safety even if the phase and neutral conductors in final circuits cannot be identified. The integrated disconnector ensures reliability of devices and installations. The standard green and red LEDs indicate the operating state of the surge protective devices.
STC Module
For protecting electronic devices against surges. For use with standard earthed socket outlets.
Surge arrester for earthed socket outlets
- Two-pole surge arrester with monitoring device and disconnector
- Enhanced safety due to fault-proof Y protective circuit
- Acoustic fault indication
- For installation in standard earthed socket outlets
- Independent of the socket outlet design
- Plastic snap-on retaining ring for easy installation in already mounted socket outlets
Version
STC 230: Snap-on module for standard earthed socket outlets
Details
The well received two-pole STC surge arrester can be fitted inconspicuously on the rear side of standard earthed socket outlets. The STC surge protection module thus adapts to every type of socket outlet. The plastic snap-on retaining ring allows easy installation even in already mounted earthed socket outlets. In addition to a thermal disconnector, the protective device features an acoustic fault indication. As the surge protection module is installed in parallel to the socket outlet, the power supply of the connected loads remains uninterrupted, even if the surge arrester is overloaded.
DEHNflex
For protecting terminal equipment against transient overvoltages. For installation into electrical installation systems, e.g. flush-mounted systems, cable ducts and flush-type boxes. German utility...
Flexible Protection of Terminal Equipment
- Two-pole surge arrester with monitoring device and disconnector
- Enhanced safety due to fault-proof Y protective circuit
- Acoustic fault indication
- Compact design
- For use in flush-mounted systems, cable ducts and flush-type boxes
Version
DEHNflex M: Compact design; for use in cable duct systems and flush-type boxes
DEHNflex A: For use in any cable duct systems or flush-type boxes; with test function
DEHNflex D: Like DEHNflex A, but for series connection of several socket outlets
Details
As the name suggests, the DEHNflex family offers almost unlimited application options. Being two-pole surge arresters, the compact modules are ideally suited for protecting electronic loads in final circuits. The design was adapted to the most common places of installation, that is cable ducts and flush-type boxes. DEHNflex devices show that small and compact dimensions do not necessarily mean that surge arresters are inefficient. The fault-proof Y protective circuit always ensures safety even if the phase and neutral conductors cannot be identified. Apart from the powerful Y circuit, the compact enclosure also houses a disconnector and an acoustic fault indicator. Be it in cable ducts, flush-mounted systems, branching boxes or device casings – DEHNflex is always installed in the right place close to terminal equipment.
VC 280 2
For protecting (electronic) terminal equipment against transient overvoltages. For installation into the enclosure or directly into the device to be protected. German utility patent.
Compact Protection for Terminal Equipment
- Two-pole surge arrester with monitoring device and disconnector
- Complete surge protection for devices supplied by a.c. voltage
- Enhanced safety due to fault-proof Y protective circuit
- Floating remote signalling contact (break contact) with test option for fault indication
- For installation on printed circuit boards
Version
VC 280 2: Mains module with integrated surge protection for installation in the terminal device to be protected
Details
VC 280 2 surge arresters are small, but no less complex. The two-pole module incorporates a fault-proof Y protective circuit, a monitoring and disconnection device as well as a floating remote signalling contact, thus ensuring compact dimensions and maximum safety. The surge arresters even feature an integrated test option for the fault indicator. VC 280 2 reliably protects electronic equipment against overvoltage. The solder pins of VC 280 2 surge arresters allow to install them directly on the PCBs of the device to be protected.
DEHNprotector
Adapters for protecting the power supply circuit of electronic devices against transient overvoltages as well as high-frequency interference voltages (DEHNpro 230 F-Protector).
Adapter with integrated Surge Protection
- Surge protection with monitoring device and disconnector
- Visual operating state (green) and fault indication (red)
- Mains filter (DEHNpro 230 F Protector only)
- Enhanced safety due to fault-proof Y protective circuit
Version
DEHNpro 230: Protection of terminal equipment
DEHNpro 230 F: Protection of terminal equipment with mains filter
Details

The adapters with integrated surge protection of the DEHNpro family protect electronic loads connected to final circuits from overvoltage. An interference suppressor filter with a balancing and unbalancing effect was integrated in the powerful surge protective circuit of DEHNpro 230 F Protectors. This combination of surge protection and filter prevents a core saturation of the filter in case of high-level transients. The nominal current carrying capability of 16 A (DEHNpro 230) and 10 A (230 F Protector) allows flexible use of these devices in final circuits. The fault-proof Y circuit ensures protection even if the phase and neutral conductors in standard earthed socket outlets cannot be identified. The integrated disconnector ensures reliability of devices and installations. The standard green and red LEDs indicate the operating state of the surge protective devices.
The modern design of the DEHNpro devices and the use of high-quality materials ensure safety in a sophisticated appearance. The DEHNpro devices thus ideally adapt to the installation environment. They create the right technical environment already at the socket outlet for connecting the latest communication and multimedia systems. The curved enclosure surfaces and the smooth surface structure ensure that the DEHNpro devices will not lose their original properties even after several years of application.
SFL Protector
Multiple socket outlet (six-way) for protecting the power supply circuit of electronic devices against transient overvoltages as well as high-frequency interference voltages.
Surge Protective Multiple Socket Outlet with Filter
- Surge protection with monitoring device and disconnector
- Interference suppressor filter
- Enhanced safety due to fault-proof Y protective circuit
- Mains switch with operating state indication (SFL PRO 6X only)
- 2 m connection cable for flexible use in a wide range of applications
- Visual operating state (green) and fault indicator (red)
Version
SFL PRO 6X: Surge protective multiple socket outlet with interference suppressor filter
SFL PRO 6X 19": Surge protective multiple socket outlet with mains filter for 482.6 mm (19 inch) data cabinets
Details

The SFL Protector surge arrester complements the wide range of Red/Line surge protective devices. The combination of surge protection and mains filter makes the six-way socket outlet a powerful device for protecting electronic loads in final circuits. The harmonised surge protection and filter functions complement one another and prevent core saturation of the filter in case of high-level transients. The integrated mains filter is optimised for protection against balanced and unbalanced high-frequency interferences. The nominal current carrying capability of 16 A allows flexible use of these devices in final circuits.
The fault-proof Y protection circuit ensures protection even if the phase and neutral conductors in standard earthed socket outlets cannot be identified. The standard green and red LEDs indicate the operating state of the surge protective device.
The SFL PRO 6X 19" has been specifically developed for use in network cabinets and therefore provides optimal protection for terminal equipment in this critical field of application.