ABB MS132-25 Motor Protection Circuit Breaker, 3-Pole, 25A, Thermal-Magnetic

In industrial control panels and motor control centers, electricians and panel builders rely on the ABB MS132-25 motor protection circuit breaker to safeguard three-phase motors up to 25 A. Its thermal-magnetic trip unit protects against overload, short-circuit, and phase failure, ensuring continuous operation of pumps, fans, and conveyors.

Key specifications

• Rated operational current: 25 A
• Setting range for overload protection: 20 – 25 A
• Rated operational voltage: 690 V AC
• Number of poles: 3
• Short-circuit breaking capacity: 100 kA at 400 V AC
• Magnetic trip current: 325 A (approx. 13 x Ie)
• Mounting: 35 mm DIN rail
• Degree of protection: IP20 terminals, IP00 front
• Connection: screw terminals, 1–10 mm² rigid
• Standards: IEC/EN 60947-1, 60947-2, 60947-4-1

Why choose it

The MS132-25 combines precise overload adjustment with high breaking capacity in a compact 45 mm width. Its thermal-magnetic mechanism reacts instantly to short circuits, while the adjustable thermal trip ensures accurate motor protection. The device is maintenance-free and offers reliable performance in demanding environments.

Ideal use cases

• Protection of three-phase motors in industrial machinery
• Motor starters in conveyor systems and pumps
• HVAC equipment and compressors
• Panel building and motor control centers

Good to know

The MS132-25 is part of ABB's manual motor starter range, suitable for use as a main switch and motor protection device. It can be combined with auxiliary contacts and shunt trips for remote signaling and control.