ABB MS132-1.6 Motor Protection Circuit Breaker 1.0-1.6A

Motors are the workhorses of industry, but they are vulnerable to overloads and short circuits that can bring operations to a halt. The ABB MS132-1.6 motor protection circuit breaker is engineered to guard your three-phase motors against these threats, ensuring reliable performance and minimizing downtime. With an adjustable thermal trip range of 1.0 to 1.6 A and a fixed magnetic trip at 20.5 A, this compact device offers precise protection tailored to your motor's needs.

Who is it for

This circuit breaker is ideal for electrical engineers, panel builders, and maintenance technicians who need a dependable, space-saving solution for motor protection in industrial control panels, machine tools, pumps, and fans. It is suitable for applications up to 690 V AC and is compliant with international standards, making it a versatile choice for global projects.

Main features

• Thermal-magnetic trip unit with adjustable thermal setting (1.0–1.6 A) and fixed magnetic trip (20.5 A)
• High breaking capacity of 100 kA at 400 V AC for robust short-circuit protection
• Three poles with screw terminals for secure wiring
• DIN rail mounting (TH35-7.5 or TH35-15) for quick installation
• IP20 protection on terminals, suitable for use in enclosed panels
• Wide ambient temperature range: -25 °C to +70 °C for operation
• Long electrical and mechanical durability: 100,000 cycles each
• Complies with IEC/EN 60947-1, 60947-2, and 60947-4-1

Specifications

• Rated operational current (Ie): 1.0–1.6 A
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated short-circuit breaking capacity (Icu) at 400 V AC: 100 kA
• Number of poles: 3
• Tripping characteristic: Thermal-magnetic
• Magnetic trip current (Ii): 20.5 A
• Connection type: Screw terminals
• Degree of protection: IP20 (terminals)
• Power loss per pole: 0.5 W
• Ambient operating temperature: -25 to +70 °C
• Ambient storage temperature: -50 to +80 °C
• Standards: IEC/EN 60947-1, IEC/EN 60947-2, IEC/EN 60947-4-1

Tips

To ensure optimal protection, set the thermal trip current to match the motor's full-load current as indicated on its nameplate. Always install the breaker in an enclosure that provides adequate protection against dust and moisture, and verify that the short-circuit current at the installation point does not exceed 100 kA. For maintenance, periodically check terminal tightness and test the trip mechanism.