DEHN
DEHN Type 2 and 3 AC Surge Arresters
DEHNguard
- Type 2 and 3 combined Devices
- 1-phase and 3-phase options
- Fault monitoring versions
- Vibration and shock-tested according to EN 60068-2
- MP versions with push-in double terminals for easy wiring
Selected variant
Technical data
Technical Data |
|
|---|---|
| Protection type | Type 2 & 3 |
| Protection class | Class 2 |
| Earthing arrangement | TT, TN-S |
| Phases | 3-phase |
| Nominal voltage | 230 / 400 V |
| Max operating voltage (L-N) | 275 V |
| 3549_Voltage protection level (kV) | ≤ 1.5 |
| Nominal discharge current | 20 kA |
| Short circuit strength | 50 kArms |
| Frequency | 50 / 60 Hz |
Dimensions |
|
| Length | 90 mm |
| Width | 72 mm |
*Invisible Heading* |
|
|---|---|
| Height | 66 mm |
| Number of modules | 4 |
Connection Data |
|
| Cross section single wire from | 1.5 mm² |
| Cross section single wire to | 35 mm² |
| Remote signalling contact | No |
| Connection type | Screw |
Additional Data |
|
| Approvals | Kema, UL, VDE |
| Tariff code | 85363030 |
| Country of origin | DE |
| Weight | 0.405 kg |
Product description
These DEHN Type 2 & 3 surge arresters are modular, multipole devices engineered to protect low-voltage electrical systems from transient overvoltages and lightning-induced surges. Built to EN 61643-11 and IEC 61643-11 standards, they are suitable for both single-phase and three-phase installations, featuring nominal voltages of 230 / 400 V with a maximum continuous operating voltage (UC) of 275 V (L–N). Each unit can withstand a nominal discharge current (In) of 20 kA (8/20 µs), with short-circuit strength rated up to 50 kArms, and suppresses voltage surges to ≤ 1.5 kV at the protection level (Up). The modular construction spans 3–4 DIN rail widths (approximately 90 × 72 × 66 mm) and includes ACI (Advanced Circuit Interruption) or spark-gap protection modules with visible green/red fault indicators and remote signalling contacts for easy status monitoring.
These arresters are ideal for safeguarding industrial control panels, machinery, distribution boards, and junction boxes, particularly in TN‑S, TN‑C, TT, and TN systems. They protect sensitive electronics, PLCs, motors, and communication equipment from damage due to switching transients and indirect lightning strikes. Their modular, push-in terminal design simplifies installation and maintenance, while the ACI technology ensures automatic disconnection of failed modules, allowing safe online replacement without shutting down the entire system. Combining Type 2 and 3 capabilities in one compact unit makes them particularly valuable for OEMs and electricians seeking reliable, space-conscious and vibration-resistant surge protection .
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