PROJOY Safety Switch PEFS-EL40H-4(P2) 2-STRING

The PROJOY PEFS-EL40H-4 safety switch (version P2) for photovoltaic installations is a DC disconnect designed for quick and safe isolation of PV modules in fire or emergency situations. Designed for installations serving 2 strings and the variant named 40H corresponding to a nominal current of approximately 40 A.

Manufacturer: ProJoy Electric Co., Ltd., based in XinTang Industrial Zone, PingJiang District, Suzhou, China. ProJoy has experience in designing DC switches for PV, using popular and certified solutions (including the PEDS switch) and offers products that meet international standards and have certifications such as TUV, CE, CB, SAA, UL, CCC.

Electrical Parameters

• String voltage range: 300–1500 V DC (max. up to 1500 V DC)
• Nominal current (variant 40H): approx. 40 A per string
• Number of supported strings: 2
• Built-in DC isolator: PEDS type, quick arc extinguishing (mechanism response time ~5 ms)
• AC control circuit power supply: 100–270 VAC (nominal voltage 230 VAC)
• Nominal control circuit current: 30 mA
• Automatic disconnection at temperature: +70 °C
• Compliance with standards: IEC 60947-3, UL508i, GB14048.3; usage category DC-PV2 / DC-PV1
• Number of operations: 10000; operations under load (PV1): >1500

Mechanical Parameters

• Degree of protection: IP66
• Protection class: II
• Operating temperature: -20 °C to +50 °C
• Storage temperature: -40 °C to +85 °C
• Cover and housing: plastic, solid construction with prepared holes and cable connectors; MC4 connectors
• Dimensions (according to drawings in documentation): cover — 250 mm × 220 mm (external dimensions), mounting hole spacing 176 mm; depth/height of the element visible in the drawing: 170 mm and 150 mm; additional dimensions read from the drawing: 276.11 mm, 115.80 mm, 34.80 mm, 20.80 mm
• Equipped with a breathing valve to prevent condensation inside the housing