Overview
The ABB MS132-2.5 is a manual motor starter and motor protection circuit breaker designed for AC-3 motor applications. This compact 45 mm width device has a rated operational current of Ie = 2.50 A. It is used to manually switch on and off motors and to protect them reliably and without the need for a fuse from short-circuits, overload and phase failures. The device offers a rated service short-circuit breaking capacity Ics = 100 kA at 400 VAC and trip class 10. This makes it an ideal choice for motor protection in industrial and commercial applications up to 0.75 kW at 400 VAC (approximately 1 HP at 440–480 VAC).
Key Features
- Built-in disconnect function, temperature compensation, trip-free mechanism and a rotary handle with clear switch position indication.
- Trip-free mechanism ensuring reliable protection independent of handle position.
- Suitable for three- and single-phase applications.
- Lockable handle to protect against unauthorized changes.
- Accessory options include auxiliary contacts, signaling contacts, undervoltage releases, shunt trips, 3-phase bus bars, and power in-feed blocks.
- Temperature compensation from -25 to +60 °C and adjustable current setting for overload protection.
Technical Specifications
The device features thermomagnetic release technology with thermal protection sensitive to phase failure, rated operating voltage 250–690V, rated uninterrupted current Iu 2.5A, rated operational power at AC-3 400V of 0.75kW, connection type main circuit screw connection, rotary knob actuation, 3 poles, and rated limiting short-circuit breaking current Icu at 400V AC of 100kA. The protection class is IP20, with dimensions of height 90mm, width 45mm, and depth 86.75mm. The temperature-compensated device has twist grip operation with a clear switch position indicator I/TRIP/0.
Typical Applications
- Industrial motor control panels and distribution boards
- Commercial motor protection circuits where fuse-less operation is preferred
- Single and three-phase motor circuits in factory automation and process equipment
- Motor protection applications up to 15.5 kW (400 VAC) within compact 45 mm module width.
- Facilities requiring phase-loss detection and overload protection
Compatibility & Replacements
The MS132-2.5 is part of the MS132 series, with adjustable current setting for overload protection in the range 1.60…2.50 A and rated power of 0.75 kW. The part number is 1SAM350000R1007. This device is suitable for drop-in replacement in existing motor protection circuits rated for 1.6–2.5 A operation. Adjacent models in the series include the MS132-1.6 (1.6–2.5 A) and MS132-4.0 (2.5–4.0 A) for alternative current ratings. Verify application voltage (250–690 VAC) and current requirements before installation.
