Hager SBN340 3-Pole 40A Load Break Switch, 3 Module DIN Rail Mount

The Hager SBN340 stands out as a robust 3-pole load break switch engineered for reliable circuit isolation in demanding electrical installations. Unlike basic isolators, its B-type characteristic and AC-22A utilization category ensure safe switching of mixed resistive and inductive loads up to 40 A, making it a dependable choice for commercial and industrial distribution boards.

Highlights

• 3-pole switching for three-phase circuits
• Rated current 40 A, voltage 400 V AC
• Compact 3-module width (52.5 mm) for DIN rail mounting
• Screw terminals accept rigid conductors up to 25 mm² and flexible up to 16 mm²
• High mechanical endurance: 10,000 operations
• Complies with IEC/EN 60947-3

In daily use

Installed on a standard 35 mm DIN rail, the SBN340 provides clear visible contact separation for safe maintenance. Its IP20 front protection and IP40 terminal shielding guard against accidental contact while allowing easy access for wiring. The switch operates reliably in ambient temperatures from -20 °C to 50 °C, and its 6 kV impulse withstand voltage ensures resilience against transient overvoltages.

Full specifications

• Brand: Hager
• Model: SBN340
• MPN: SBN340
• EAN: 3250615510181
• Product type: Load break switch
• Number of poles: 3
• Rated current (In): 40 A
• Rated voltage (Ue): 400 V AC
• Rated insulation voltage (Ui): 500 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated frequency: 50/60 Hz
• Utilization category: AC-22A
• Module width: 3 modules (52.5 mm)
• Mounting type: DIN rail
• Terminal type: Screw terminals
• Terminal capacity rigid: 1.5 - 25 mm²
• Terminal capacity flexible: 1.5 - 16 mm²
• Degree of protection: IP20 (front), IP40 (terminals)
• Operating temperature: -20 to 50 °C
• Storage temperature: -40 to 80 °C
• Standard: IEC/EN 60947-3
• Mechanical endurance: 10,000 cycles
• Electrical endurance: 1,500 cycles
• Dimensions (W x H x D): 52.5 x 83 x 68 mm

Final note

A space-efficient, high-durability isolation solution that meets stringent safety standards — ideal for panel builders and electricians who demand dependable performance.