DEHN 956205 Combined Arrester Type 1+2+3 DEHNventil M2 (956205)

Protecting electrical installations from lightning strikes and surges is critical for safety and equipment longevity. The DEHNventil M2 combines Type 1, Type 2, and Type 3 surge protection in a single compact device, designed for 230/400 V AC systems. Its spark gap technology safely discharges high lightning currents and limits overvoltages, ensuring reliable protection for your electrical infrastructure.

Who is it for

This combined arrester is ideal for electricians, panel builders, and facility managers who need robust surge protection for low-voltage power distribution systems. It is suitable for industrial, commercial, and residential applications where space is limited but performance cannot be compromised.

Main features

• Combined Type 1+2+3 surge protection in one unit
• High lightning impulse current discharge capacity: 12.5 kA per pole (10/350 µs)
• Low voltage protection level: ≤ 1.5 kV
• Follow current extinguishing capability up to 50 kA rms
• Compact 4-module width (72 mm) for DIN rail mounting
• Operating temperature range from -40 °C to +80 °C

Specifications

• SPD type: Type 1 + Type 2 + Type 3
• Nominal voltage (U_N): 230 / 400 V AC
• Max. continuous operating voltage (U_C): 255 V AC
• Lightning impulse current (I_imp) (10/350 µs): 12.5 kA per pole, 50 kA total
• Nominal discharge current (I_n) (8/20 µs): 20 kA per pole, 50 kA total
• Voltage protection level (U_p): ≤ 1.5 kV at I_imp, ≤ 1.2 kV at I_n
• Follow current extinguishing capability (I_fi): 50 kA rms
• Max. back-up fuse (gL/gG): 315 A
• Operating temperature range: -40 °C to +80 °C
• Mounting type: 35 mm DIN rail
• Number of poles: 3-pole + NPE (3+1 circuit)
• Protection degree: IP20
• Standards compliance: EN 61643-11, IEC 61643-11
• Technology: Spark gap (RADAX Flow)
• Short-circuit withstand capability (I_SCCR): 50 kA rms
• Response time (t_A): ≤ 100 ns
• Housing material: Thermoplastic, UL 94 V-0
• Module width: 4 TE (72 mm)

Tips

Ensure the back-up fuse does not exceed 315 A gL/gG to maintain proper coordination. Install the arrester as close as possible to the incoming power supply for optimal protection. Regularly inspect the status indication window to verify the device is functional.