ABB OTOT40G1-4BSN1Plus 40A 4-Pole Load Disconnect Switch, Front Operated, DIN Rail Mount

In industrial control panels and machine power distribution, the ABB OTOT40G1-4BSN1Plus load disconnect switch provides a reliable means to isolate four-pole circuits up to 40 A. Electricians and panel builders install this switch on DIN rail or screw mount it, using the front-operated handle (sold separately) to manually connect or disconnect the load. Its robust construction and compliance with IEC 60947-3 make it suitable for demanding environments where safety and durability are paramount.

Key specifications

• Product type: Load disconnect switch
• Number of poles: 4
• Rated operational current (Ie): 40 A
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 1000 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Rated short-time withstand current (Icw): 1 kA (1s)
• Rated conditional short-circuit current (Icc): 50 kA (with gG 40 A fuse)
• Mounting type: DIN rail / screw mounting
• Terminal type: Screw terminals
• Terminal capacity: 1.5 - 16 mm²
• Degree of protection: IP20 (terminals), IP65 (front with suitable enclosure)
• Standards: IEC 60947-3
• Operating mechanism: Front operated
• Frame size: G1
• Handle included: No (sold separately)

Why choose it

The OTOT40G1-4BSN1Plus offers high breaking capacity and reliable isolation in a compact G1 frame. Its screw terminals accommodate a wide range of conductor sizes, ensuring secure connections. The switch is engineered for longevity, with a mechanical endurance that withstands frequent operation. Its front-operated design allows for easy integration into control panels, and the IP65 front protection (with appropriate enclosure) makes it suitable for use in dusty or wet environments.

Ideal use cases

• Maintenance and repair operations requiring safe isolation of machinery
• Motor control circuits in industrial automation
• Power distribution in commercial buildings
• Renewable energy systems (solar inverters, wind turbines) for DC/AC isolation
• HVAC and pumping systems

Good to know

The switch is part of ABB's OT series, known for modularity and ease of installation. The handle is not included and must be ordered separately, allowing customization based on panel door or direct mounting. Always verify short-circuit protection coordination with appropriate fuses or circuit breakers. For detailed technical data, refer to the ABB product datasheet.