ABB OT40F3 3-Pole Load Break Switch 40A 690V AC 1SCA104902R1001

Industrial electricians and panel builders use the ABB OT40F3 load break switch to safely isolate three-phase circuits up to 40 A. This front-operated, base-mounted switch is installed in distribution boards and machine control panels where reliable manual disconnection is required.

Key specifications

• Number of poles: 3
• Rated operational current: 40 A (AC-21A, AC-22A, AC-23A at 690 V)
• Rated operational voltage: 690 V AC
• Rated insulation voltage: 750 V
• Rated impulse withstand voltage: 8 kV
• Rated short-circuit making capacity: 1.5 kA (0.05 s)
• Rated short-circuit withstand current: 0.7 kA (1 s)
• Mounting: front operated, base mounted
• Terminals: screw terminals, 1.5–16 mm² (Cu)
• Degree of protection: IP20 (terminals)
• Standards: IEC 60947-3
• Operating temperature: -25 to +70 °C
• Electrical durability: 2000 cycles (AC-23A, 690 V)
• Mechanical durability: 20000 cycles
• Power loss: 2.5 W per pole
• Switch function: ON-OFF
• Handle type: direct operated (handle not included)

Why choose it

The OT40F3 provides a compact and robust disconnecting solution for three-phase circuits. Its high short-circuit withstand rating and wide operating temperature range make it suitable for demanding industrial environments.

Ideal use cases

• Isolation of motors and machinery during maintenance
• Main switch in control panels and distribution boards
• Disconnecting power to heating and lighting circuits

Good to know

The switch is compliant with IEC 60947-3 and features screw terminals for secure conductor connection. A separate handle is required for operation.