imo c4/100r-75 thermal/mag motor circuit breaker 55-75a

Why Choose the IMO C4/100R-75 Motor Protection Circuit Breaker?

The IMO C4/100R-75 is a heavy-duty thermal magnetic motor protection circuit breaker (MPCB) designed to provide reliable protection for three-phase electric motors against overloads, short circuits and phase failure. As part of the IMO C4 Motor Protection Circuit Breaker series, it is engineered for demanding industrial machinery, motor starter assemblies, automation systems and OEM control panels.

This motor protection circuit breaker features an adjustable thermal overload setting from 55.0 to 75.0A together with a fixed 975A magnetic short-circuit trip. Its thermal magnetic protection provides accurate overload sensing while delivering rapid fault clearance to protect motors, cables and associated equipment.

Designed for industrial panel mounting, the C4/100R-75 combines overload protection, short-circuit protection and manual motor isolation within one compact device. Its robust construction makes it suitable for larger motors operating in demanding manufacturing and process applications.

Key Advantages

• Heavy-duty thermal magnetic motor protection circuit breaker.
• Adjustable overload range of 55.0 to 75.0A.
• 975A magnetic short-circuit trip.
• Protects against overload, short circuit and phase failure.
• Manual motor isolation and switching capability.
• Suitable for industrial motor starter and automation panels.

Key Features

• IMO C4 Motor Protection Circuit Breaker series.
• 55.0 to 75.0A adjustable thermal setting.
• 975A instantaneous magnetic trip.
• Three-pole motor protection.
• Thermal magnetic trip mechanism.
• Phase failure sensitivity.
• Short-circuit breaking capacity up to 50kA at 400V AC.
• Compatible with auxiliary contacts and control accessories.

Technical Specifications

• Manufacturer: IMO Precision Controls
• Series: C4 Motor Protection Circuit Breakers
• Model: C4/100R-75
• Product type: Thermal magnetic motor protection circuit breaker
• Thermal adjustment range: 55.0 to 75.0A
• Magnetic trip: 975A
• Suitable motor power: Up to approximately 37kW at 400V AC
• Number of poles: 3
• Rated operational voltage: Up to 690V AC
• Rated insulation voltage: 1000V
• Frequency: 50 / 60Hz
• Short-circuit breaking capacity: Up to 50kA at 400V AC
• Protection: Overload, short circuit and phase failure
• Mounting type: Panel mounting
• Protection rating: IP20
• Standards: IEC/EN 60947-1, IEC/EN 60947-2 and IEC/EN 60947-4-1

Reliable Motor Protection for Industrial Applications

Motor protection circuit breakers combine overload protection, short-circuit protection and manual isolation within one compact device. The IMO C4 series simplifies motor control panel design while providing dependable protection for electric motors operating in industrial automation, manufacturing and process control environments.

The C4/100R-75 is ideally suited to protecting motors with a full load current between 55.0A and 75.0A, helping reduce downtime, improve operational safety and maximise equipment reliability.

Typical Applications

• Industrial motor starters.
• Large pumps and compressors.
• Material handling and conveyor systems.
• Industrial fans and ventilation equipment.
• Manufacturing and processing machinery.
• OEM automation systems.

Trusted by Industrial Engineers Worldwide

IMO C4 motor protection circuit breakers are trusted by panel builders, OEMs and industrial engineers for dependable motor protection, safe isolation and reliable long-term performance in demanding industrial applications.