imo mcor-3-42 thermal overload relay for mc50-mc74 contactors 28-42 amps

Why Choose the IMO MCOR-3-42 Thermal Overload Relay?

The IMO MCOR-3-42 is a heavy-duty thermal overload relay engineered to provide dependable motor protection for industrial control and automation systems. Designed specifically for use with the IMO MC contactor series, this overload relay protects motors against overload conditions, phase failure and excessive current draw, helping maximise motor lifespan while reducing downtime in demanding industrial environments.

Part of the trusted IMO MCOR thermal overload relay range, the MCOR-3-42 features an adjustable overload setting range of 28 to 42A, with star-delta protection support from 48 to 73A. It includes integrated 1NO + 1NC auxiliary contacts and is designed for direct mounting onto compatible IMO contactors, making it ideal for industrial motor starter assemblies and automation systems.

Its compact industrial mounting format allows seamless integration with IMO MC50 to MC74 contactors, creating a reliable and efficient motor starter solution for pumps, compressors, conveyors, HVAC systems and industrial process machinery.

Key Advantages

• Reliable thermal overload motor protection for industrial applications.
• Adjustable overload range from 28 to 42A.
• Supports star-delta motor protection from 48 to 73A.
• 1NO + 1NC auxiliary contacts included.
• Designed for use with IMO MC50 to MC74 contactors.
• Compact industrial plug-in mounting configuration.

Key Features

• IMO MCOR thermal overload relay series.
• 28 - 42A adjustable current range.
• 48 - 73A YD star-delta protection range.
• Suitable for MC50 to MC74 contactors.
• Manual reset operation.
• 1NO + 1NC auxiliary contacts.
• Integrated thermal overload and phase failure protection.
• Compact industrial contactor-mounted design.

Technical Specifications

• Manufacturer: IMO Precision Controls
• Series: MCOR Thermal Overload Relays
• Model: MCOR-3-42
• Product type: Thermal overload relay
• Adjustable current range: 28 - 42A
• Star-delta range: 48 - 73A
• Compatible contactors: IMO MC50 to MC74
• Auxiliary contacts: 1NO + 1NC
• Reset mode: Manual reset
• Mounting type: Plug-in / contactor mount
• Number of poles: 3 pole
• Rated operational voltage: up to 690V AC
• Protection function: Thermal overload and phase failure protection
• Rated current: 42A maximum
• Warranty: 1 year
• Approvals: CE, cUL, UL, RoHS compliant

Reliable Motor Protection for Industrial Systems

Thermal overload relays such as the IMO MCOR-3-42 are designed to protect electric motors from overheating caused by overload conditions, stalled rotors or phase imbalance. By disconnecting the motor before thermal damage occurs, overload relays improve system reliability, reduce maintenance costs and protect industrial equipment from premature failure.

The MCOR series is specifically engineered for direct integration with IMO MC contactors, creating compact and dependable motor starter assemblies suitable for demanding industrial automation systems and heavy-duty machinery.

Typical Applications

• Industrial motor starter assemblies.
• Pumps and compressor systems.
• HVAC and ventilation equipment.
• Conveyors and material handling systems.
• Industrial automation machinery.
• Three-phase motor protection systems.

Trusted by Industrial Automation Engineers

IMO MCOR thermal overload relays are trusted throughout industrial automation systems for dependable motor protection, reliable overload detection and long-term operational performance.