ABB OTOT40G1-4BSN2Plus 40A 4-Pole Load Disconnect Switch, G1 Frame, Base Mounting

Panel builders and maintenance electricians rely on the ABB OTOT40G1-4BSN2Plus for safe load isolation in commercial and industrial distribution systems. This 4-pole disconnect switch handles up to 40 A and provides a visible break for secure maintenance. Its compact G1 frame and base mounting fit neatly into distribution boards, motor control centers, and machine disconnects.

Key specifications

• Rated operational current (Ie): 40 A
• Number of poles: 4
• Rated operational voltage: 750 V AC / 1000 V DC
• Rated insulation voltage (Ui): 1000 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Frame size: G1
• Mounting type: Base mounting (screw)
• Terminal type: Screw terminals
• Conductor cross-section: 1.5 mm² to 16 mm²
• Switching category: AC-21A
• Electrical durability (AC-21A): 2000 cycles
• Mechanical durability: 20000 cycles
• Operating temperature range: -25 to +70 °C
• Standards compliance: IEC 60947-3
• Protection degree (terminals): IP20
• Rated short-time withstand current (Icw): 1 kA (1s)
• Rated short-circuit making capacity (Icm): 1.5 kA peak

Why choose it

The OTOT series is known for robust construction and dependable isolation. This switch provides a clear visible break, ensuring safe maintenance. With a high impulse withstand voltage and compliance to IEC 60947-3, it meets the demands of modern electrical systems. The screw terminals accommodate a wide range of conductor sizes, simplifying installation.

Ideal use cases

• Main switch in distribution boards
• Disconnect switch for motor circuits
• Isolation in industrial machinery

Good to know

Handle or actuator is not included and must be ordered separately. The switch is suitable for use as a main switch or disconnect switch in AC-21A applications.