Hager SB432PV Modular PV Isolation Switch, 4 Pole, 32A, 1000VDC

Solar installers and electrical contractors need a reliable method to isolate photovoltaic circuits for safe maintenance and emergency shutdown. The Hager SB432PV is a modular DC isolator switch engineered specifically for PV systems, delivering robust switching performance at system voltages up to 1000VDC and currents up to 32A. With four poles and a compact 4-module design, it integrates seamlessly into standard DIN-rail distribution boards.

Key specifications

• Number of poles: 4P
• Rated current: 32A
• Rated voltage: 1000VDC
• Application: Photovoltaic (PV) systems
• Mounting: DIN rail (EN 60715)
• Degree of protection: IP20 terminals, IP40 front face (in enclosure)
• Module width: 4 modules
• Breaking capacity: 32A at 1000VDC (DC-21B)
• Operating temperature: -25 to 70 °C
• Terminal capacity: 1.5–35 mm² (rigid), 1.5–25 mm² (flexible)
• Standards compliance: IEC/EN 60947-3
• Electrical life: 1500 cycles
• Mechanical life: 10000 cycles
• Rated impulse withstand voltage: 6 kV
• Pollution degree: 3
• Overvoltage category: III
• Short-circuit current rating: 10 kA (1s)
• Terminal type: Screw terminals

Why choose it

The SB432PV is built to meet stringent safety standards for PV systems. Its high DC voltage rating ensures safe disconnection under load, while the rugged construction and wide operating temperature range make it suitable for outdoor and industrial environments. The screw terminals accept conductors up to 35 mm², providing flexible installation options.

Ideal use cases

• DC side isolation in residential and commercial solar installations
• Combiner boxes and string inverters
• Maintenance and emergency shutdown circuits
• Integration into distribution boards for solar PV systems

Good to know

The switch is compliant with IEC/EN 60947-3 and features a compact 4-module width for space-saving panel design. With an electrical life of 1,500 cycles and mechanical life of 10,000 cycles, it delivers long-term reliability. The IP40 front face provides protection against dust and splashing water when mounted in an enclosure.