DEHN DG MP YPV 1200 FM Surge Arrester Type 2 for PV Systems up to 1170 V DC 942565

In photovoltaic installations with long DC cable runs, lightning-induced surges can destroy inverters and modules. The DEHN DG MP YPV 1200 FM surge arrester protects PV systems up to 1170 V DC by safely diverting surge currents to ground. Its three-pole design covers all protection paths: DC+ to DC-, DC+ to PE, and DC- to PE. With a nominal discharge current of 20 kA and maximum discharge current of 40 kA, it handles high-energy surges. The integrated thermal disconnector and visual status indicator ensure safe operation, while the floating changeover contact enables remote monitoring. Mounted on a 35 mm DIN rail, it fits standard distribution boards.

Key specifications

• Type 2 surge arrester for photovoltaic systems
• Max continuous operating voltage (Ucpv): 1170 V DC
• Nominal discharge current (In): 20 kA (8/20 µs)
• Max discharge current (Imax): 40 kA (8/20 µs)
• Voltage protection level (Up): ≤ 4.0 kV
• Short-circuit withstand capability (Iscpv): 1000 A DC
• Protection paths: DC+ to DC-, DC+ to PE, DC- to PE
• Number of poles: 3
• Remote signaling: floating changeover contact
• Mounting: 35 mm DIN rail
• Operating temperature: -40 °C to +80 °C
• Degree of protection: IP20

Why choose it

This surge arrester combines high discharge capacity with a compact DIN-rail design. The remote signaling contact allows integration into building management systems, enabling immediate fault detection. The visual status indicator provides a clear on-site check of device status, reducing maintenance time.

Ideal use cases

• Commercial and utility-scale PV installations with DC voltages up to 1170 V
• Protection of central inverters and combiner boxes
• Retrofit applications in existing PV systems requiring Type 2 protection

Good to know

The device is tested according to EN 50539-11 and IEC 61643-31, ensuring reliable performance in demanding PV environments. Its thermal disconnector safely isolates the arrester in case of overload, preventing fire hazards.