DEHN DCU 2 YPV 1+2 1200 1S MC4 Type 1+2 Combined Surge Arrester for PV Systems, 1200 V DC, MC4 Connectors, DIN Rail Mount, Red 900985,0

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 is a combined Type 1 and Type 2 surge protective device that safely discharges lightning currents and limits overvoltages in PV systems up to 1200 V DC. Its spark-gap controlled isolation (SCI) technology prevents unwanted leakage currents and ensures reliable disconnection of the arrester from the PV circuit in case of overload.

Who is it for

This arrester is intended for solar installers and system integrators who need robust protection for single-string PV systems with MC4 connectors. It suits rooftop and ground-mounted arrays where lightning protection is required according to EN 50539-11 and IEC 61643-31.

Main features

• Combined Type 1 + Type 2 surge arrester for one PV string
• Max. continuous operating voltage Ucpv: 1200 V DC
• Nominal discharge current (8/20 µs): 20 kA; max. discharge current: 40 kA
• Impulse current (10/350 µs): 6.25 kA per pole
• Voltage protection level Up ≤ 4.0 kV; short-circuit withstand 200 A DC
• MC4 plug-in connectors for quick, safe installation
• Remote signaling contact (floating changeover) for status monitoring
• Mounts on 35 mm DIN rail; compact red thermoplastic housing, IP20

Specifications

• SPD type: Type 1 + Type 2 combined arrester
• Application: Photovoltaic systems
• Max. continuous operating voltage (Ucpv): 1200 V DC
• Nominal discharge current (In): 20 kA (8/20 µs)
• Max. discharge current (Imax): 40 kA (8/20 µs)
• Impulse current (Iimp): 6.25 kA (10/350 µs)
• Voltage protection level (Up): ≤ 4.0 kV
• Short-circuit withstand capability (Iscpv): 200 A DC
• Number of PV strings: 1
• Connection type: MC4 plug-in connectors
• Remote signaling contact: Yes (floating changeover contact)
• Mounting type: 35 mm DIN rail
• Operating temperature range: -40 °C to +80 °C
• Degree of protection: IP20
• Housing material: Thermoplastic, red, UL 94 V-0
• Test standards: EN 50539-11, IEC 61643-31
• Disconnector technology: SCI (Spark-gap Controlled Isolation)

Tips

Install the DCU 2 YPV 1+2 1200 1S MC4 close to the inverter or at the PV array junction box. The remote signaling contact allows integration into a monitoring system for immediate fault indication. Ensure the DC circuit is disconnected before installation and follow the wiring diagram for correct polarity.