DEHN DG S 320 FM Surge Protective Device
The DEHN DG S 320 FM (Reference Number: 952 093) is a highly reliable, single-pole surge protective device (SPD) engineered to safeguard low-voltage power supply systems and equipment from transient overvoltages and power surges. Featuring a modular design with advanced varistor technology, this Type 4 SPD ensures robust protection with a nominal discharge current of 20 kA. The “FM” designation indicates it comes equipped with a floating remote signaling contact for seamless integration into facility monitoring systems. Compliant with stringent international standards including EN 61643-11 and GB/T 18802.11, the DG S 320 FM guarantees optimal safety and performance in demanding industrial environments with operating temperatures up to 85°C.
Technical Specifications:
- Brand: DEHN
- Model: DG S 320 FM
- Reference Number: 952 093
- SPD Classification: Type 4
- Voltage / Frequency: 1 ~ 320 Vac, 50/60 Hz
- Max. Continuous Operating Voltage (MCOV): 320 Vac
- Nominal Discharge Current (In): 20 kA
- Measured Limiting Voltage (MLV): 1860 Vpk
- Protection Mode: L-L
- Max Ambient Temperature: 85°C
- Standards: GB/T 18802.11, EN 61643-11
- Certifications: UKCA, CE, EAC, cURus

| Brand | DEHN |
|---|---|
| Model | DG S 320 FM |
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ENERAL DELIVERY INFORMATION
Orders will be processed and shipping during standard working hours (0830 – 1700 GMT+8) Monday to Friday (excluding Bank Holidays)
On rare occasions, your order may be handled and/or processed on a Saturday. However, we are unable to ship items on weekends, therefore any orders dealt with on the weekend will be send out the next following working day.
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Any orders placed after the cut-off will ship the next working day assuming all parts are in stock and ready for dispatch.
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DEHN DG S 320 FM Surge Protective Device
Shop the DEHN DG S 320 FM (952 093) Surge Protective Device. A premium Type 4 SPD offering 320 Vac operating voltage, 20 kA nominal discharge capacity, and remote signaling (FM) for superior industrial surge protection. CE, UKCA, and cURus approved.

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