DEHN DCU EMOB 1 32 Surge Arrester Type 1+2 (900904)

Electric vehicle charging stations are exposed to transient overvoltages from lightning strikes and switching operations, which can damage sensitive electronics and cause costly downtime. The DEHN DCU EMOB 1 32 is a combined Type 1+2 surge arrester specifically engineered to protect AC-side circuits of EV charging infrastructure, ensuring reliable operation and safety.

Who is it for

This arrester is intended for installers, system integrators, and operators of electric vehicle charging stations who require robust surge protection compliant with IEC 61643-11. It is suitable for both new installations and retrofits in commercial, public, and residential charging applications.

Main features

• Combined Type 1+2 protection in a single compact unit
• High discharge capacity: 20 kA nominal (8/20 µs) and 40 kA maximum (8/20 µs)
• Impulse current rating of 7 kA (10/350 µs) per pole
• Low voltage protection level ≤ 1.5 kV for effective equipment protection
• 3-pole + NPE configuration for TN-S and TT systems
• Visual status indication with green/red flag for quick inspection
• DIN rail mounting for easy integration into distribution boards
• Thermoplastic flame-retardant housing for durability

Specifications

• Arrester type: Type 1 + Type 2 combined surge arrester
• Nominal AC voltage (Un): 230 / 400 V AC
• Maximum continuous operating voltage (Uc): 320 V AC
• Nominal discharge current (In): 20 kA (8/20 µs)
• Maximum discharge current (Imax): 40 kA (8/20 µs)
• Impulse current (Iimp): 7 kA (10/350 µs) per pole
• Voltage protection level (Up): ≤ 1.5 kV
• Number of poles: 3-pole + NPE (3P+N)
• Mounting type: 35 mm DIN rail
• Degree of protection: IP20
• Operating temperature range: -40 °C to +80 °C
• Short-circuit withstand capability (Isccr): 50 kA rms
• Follow current extinguishing capability (Ifi): 50 kA rms
• Standards compliance: IEC 61643-11 / EN 61643-11
• Status indication: visual (green/red flag)
• Protection technology: varistor (L-N, L-PE) / spark gap (N-PE)
• Housing material: thermoplastic, flame-retardant

Tips

For optimal protection, install the arrester as close as possible to the incoming supply of the charging station. Ensure proper grounding and follow local regulations. The visual indicator should be checked regularly; if the flag turns red, the arrester has reached end of life and must be replaced.