DEHN DVA EMOB 3P 255 FM Combined Type 1+2 Surge Arrester for E-Mobility Charging Stations, 230/400 V, 3-Pole, Remote Signalling

Electricians and charging station installers rely on the DEHN DVA EMOB 3P 255 FM to protect AC-side e-mobility infrastructure from lightning surges and transient overvoltages. Mounted on a 35 mm DIN rail inside the charging station enclosure, this combined Type 1+2 arrester ensures continuous operation and safety for connected vehicles and equipment.

Key specifications

• Arrester type: Combined Type 1 + Type 2 (according to IEC/EN 61643-11)
• Nominal voltage: 230 / 400 V AC, 50/60 Hz
• Max. continuous operating voltage (Uc): 255 V AC
• Lightning impulse current (Iimp) per pole: 7.5 kA (10/350 µs), total 22.5 kA
• Nominal discharge current (In): 20 kA (8/20 µs), max. discharge current (Imax): 40 kA (8/20 µs)
• Voltage protection level (Up): ≤ 1.5 kV
• Follow current extinguishing capability: 50 kA rms
• Response time: < 100 ns
• 3-pole design with floating changeover remote signalling contact
• Operating temperature: -40 °C to +80 °C, IP20, red thermoplastic housing

Why choose it

This arrester combines high discharge capacity with fast response, ensuring reliable protection for sensitive charging electronics. The remote signalling contact allows integration into building management systems for immediate fault indication, reducing downtime and maintenance costs.

Ideal use cases

• AC charging stations for electric vehicles (mode 3, up to 22 kW)
• Wallboxes and charging infrastructure in residential, commercial, and public areas
• Protection of power supply lines feeding e-mobility equipment

Good to know

The unit is compliant with IEC/EN 61643-11 and offers a short-circuit withstand capability of 50 kA rms. It is designed for DIN rail mounting and features a compact, red thermoplastic housing with IP20 protection, suitable for indoor installations within charging station enclosures.