ABB OTOT25G1-4BSN2Plus 4-Pole Switch-Disconnector 25 A Frame Size G1

In industrial control panels and distribution boards, the ABB OTOT25G1-4BSN2Plus serves as a robust 4-pole switch-disconnector, enabling safe isolation of circuits up to 25 A. Electricians and panel builders rely on its direct operation and clear ON/OFF indication for maintenance and emergency switching. The compact G1 frame fits standard DIN rails or base mounting, making it a versatile choice for new installations and retrofits.

Key specifications

• Product type: Switch-disconnector
• Number of poles: 4
• Rated operational current (Ie): 25 A
• Rated operational voltage (Ue): 750 V AC
• Rated insulation voltage (Ui): 750 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Rated frequency: 50/60 Hz
• Rated operational power (AC-23A, 400 V): 11 kW
• Rated short-time withstand current (Icw): 1 kA (1 s)
• Mounting type: DIN-rail / base mounting
• Handle type: Direct operation (black)
• Terminal type: Screw terminals
• Terminal capacity: 1.5 – 16 mm²
• Degree of protection: IP20 (front)
• Standards: IEC 60947-3
• Operating temperature range: -25 to +70 °C
• Electrical durability: 10,000 cycles
• Mechanical durability: 20,000 cycles
• Frame size: G1

Why choose it

ABB's OTOT series is engineered for reliable performance in demanding electrical environments. The OTOT25G1-4BSN2Plus combines high breaking capacity with a compact footprint, reducing panel space without compromising safety. Its screw terminals accept a wide range of conductor sizes, ensuring secure connections. The black direct handle provides clear visual status and can be padlocked in the OFF position for lockout/tagout procedures.

Ideal use cases

• Isolation of motor circuits in industrial machinery
• Maintenance switches for HVAC and pumping systems
• Local disconnects for conveyor lines and packaging equipment
• Panel board main switches in commercial buildings

Good to know

The device meets IEC 60947-3 and is suitable for use in circuits up to 750 V AC. It can be mounted on 35 mm DIN rail or with screws on a base plate. The IP20 front protection is intended for installation inside an enclosure. For auxiliary contacts or additional poles, refer to ABB accessories.