Hager SFT340 Modular Changeover Switch I-0-II 3P 40A 400V AC

The Hager SFT340 is a high-quality modular changeover switch designed for reliable switching and isolation in electrical installations. With three switching positions (I-0-II) and three poles, it is ideal for controlling and protecting circuits up to 40A at 400V AC. This switch is built to meet EN 60947-3 standards, ensuring safety and performance in industrial and commercial applications.

Advantages

Robust construction with high electrical and mechanical endurance (10,000/20,000 cycles). Compact 3-module design saves space on DIN rail. Clear switching position indication for safe operation. Suitable for a wide temperature range (-20 to 50 °C).

Suitable for

• Changeover between two power sources (e.g., mains and generator)
• Isolation of electrical circuits for maintenance
• Motor control and switching of three-phase loads
• Industrial control panels and distribution boards

Key specifications

• Switch Type: Modular Changeover Switch
• Switching Positions: I-0-II
• Number of Poles: 3-Pole (3P)
• Rated Current: 40 A
• Rated Operational Voltage: 230/400 V AC
• Rated Insulation Voltage: 500 V
• Rated Impulse Withstand Voltage: 4 kV
• Module Width: 3 Modules (54 mm)
• Mounting: DIN Rail
• Connection Capacity (Rigid): 1.5 - 25 mm²
• Connection Capacity (Flexible): 1.5 - 16 mm²
• Degree of Protection: Front IP40, Terminals IP20
• Operating Temperature: -20 to 50 °C
• Standards: EN 60947-3

Recommendations

For optimal performance, use with appropriately rated cables and ensure proper installation by a qualified electrician. Always verify compatibility with your existing system.