DEHN DCU 2 YPV 1+2 1200 1S MC4 Type 1+2 Surge Arrester for Photovoltaic Systems 900986,0

Photovoltaic installations are exposed to direct lightning strikes and switching surges that can destroy inverters and modules. The DEHN DCU 2 YPV 1+2 1200 1S MC4 combines Type 1 and Type 2 surge protection in one compact unit, safeguarding a single PV string with a maximum continuous operating voltage of 1200 V DC.

Who is it for

Solar installers and system integrators who need reliable, easy-to-install surge protection for rooftop or ground-mounted PV arrays, especially where MC4 connectors are already in use.

Main features

• Combined Type 1+2 protection per EN 50539-11 and IEC 61643-31
• Rated for 1200 V DC maximum continuous operating voltage
• Protects one PV string with MC4 plug-in connectors
• High discharge capacity: impulse current 6.25 kA (10/350 µs), nominal 20 kA, maximum 40 kA (8/20 µs)
• Voltage protection level ≤ 4.0 kV
• Short-circuit withstand capability 1000 A DC
• Integrated disconnector with visual fault indication (green/red)
• IP65 enclosure, UV-resistant polycarbonate housing
• Operating temperature range -40 °C to +80 °C
• Protection modes: (DC+) - PE, (DC-) - PE, (DC+) - (DC-)

Specifications

• Surge arrester type: Type 1 + Type 2 combined
• Application: Photovoltaic (PV) systems
• Max. continuous operating voltage (Ucpv): 1200 V DC
• Nominal discharge current (In) (8/20 µs): 20 kA
• Max. discharge current (Imax) (8/20 µs): 40 kA
• Impulse current (Iimp) (10/350 µs): 6.25 kA
• Voltage protection level (Up): ≤ 4.0 kV
• Short-circuit withstand capability (Iscpv): 1000 A DC
• Number of PV strings protected: 1
• Connection type: MC4 plug-in connectors
• Protection modes: (DC+) - PE, (DC-) - PE, (DC+) - (DC-)
• Enclosure protection rating: IP65
• Housing material: UV-resistant polycarbonate
• Mounting type: Surface mounting
• Operating temperature range: -40 °C to +80 °C
• Standards compliance: EN 50539-11, IEC 61643-31
• Integrated disconnector: Yes
• Fault indication: Visual (green/red)

Tips

For optimal protection, install the arrester as close as possible to the inverter or DC combiner box. Ensure all MC4 connections are securely locked and check the visual indicator regularly to confirm the unit is operational.