DEHN DCU 2 YPV 1100 1S MC4 FM DCU 2 FM GAK Type 2 Surge Protective Device for PV Systems (900911,0)

The DEHN DCU 2 YPV 1100 1S MC4 FM is a Type 2 surge protective device engineered specifically for photovoltaic systems operating up to 1100 V DC. Unlike generic SPDs, it combines a high-energy varistor with an integrated SCI fuse, providing both surge protection and short-circuit withstand capability of 1000 A DC in a single compact unit. This eliminates the need for separate fusing and simplifies installation on 35 mm DIN rails.

Highlights

• Type 2 SPD for PV applications per EN 50539-11 / IEC 61643-31
• Maximum continuous operating voltage Ucpv: 1100 V DC
• Nominal discharge current (8/20 µs): 20 kA; maximum discharge current: 40 kA
• Voltage protection level Up ≤ 4.0 kV
• Integrated SCI fuse for short-circuit withstand up to 1000 A DC
• Remote signalling contact (potential-free changeover) for status monitoring
• Compact 3-module width (approx. 54 mm) for DIN rail mounting
• Operating temperature range: -40 °C to +80 °C; IP20 protection

In daily use

Installed in the DC combiner box or inverter input, the DCU 2 YPV 1100 1S MC4 FM protects PV strings from transient overvoltages caused by lightning or switching operations. Its red thermoplastic housing (UL 94 V-0) and screw terminals ensure reliable connection. The remote signalling contact allows integration into monitoring systems, providing immediate indication of device status.

Full specifications

• Product Type: Surge Protective Device (SPD)
• SPD Class: Type 2 according to EN 50539-11 / IEC 61643-31
• Application: Photovoltaic (PV) Systems
• Max. Continuous Operating Voltage (Ucpv): 1100 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 (with integrated fuse)
• Integrated Fuse: Yes (SCI technology)
• Number of Poles: 2-pole
• Remote Signalling Contact: Yes (potential-free changeover contact)
• Mounting: 35 mm DIN rail
• Module Width: 3 DIN modules (approx. 54 mm)
• Operating Temperature Range: -40 °C to +80 °C
• Protection Degree: IP20
• Housing Material: Thermoplastic, red, UL 94 V-0
• Connection Type: Screw terminals

Final note

The DEHN DCU 2 YPV 1100 1S MC4 FM is a robust and reliable choice for PV surge protection, combining high discharge capacity with integrated short-circuit protection in a space-saving design.