IMO MCOR-3-74 thermal overload relay with adjustable 63-74A current range and integrated auxiliary contacts for industrial motor protection applications.
£160.01
The IMO MCOR-3-74 is a heavy-duty thermal overload relay designed to provide reliable motor protection for industrial motor starter and automation systems. Engineered specifically for use with the IMO MC contactor series, this overload relay protects motors against overload conditions, excessive current draw and phase failure, helping improve equipment reliability and reduce costly downtime in industrial environments.
Part of the trusted IMO MCOR thermal overload relay range, the MCOR-3-74 features an adjustable overload setting range of 63 to 74A, making it ideal for larger industrial motors and demanding motor control applications. Integrated 1NO + 1NC auxiliary contacts together with robust thermal trip protection provide dependable fault signalling and motor protection performance.
Its compact industrial mounting design allows direct installation onto compatible IMO MC50 to MC74 contactors, creating a reliable and efficient motor starter assembly suitable for compressors, pumps, conveyors, HVAC systems and industrial process equipment.
Thermal overload relays such as the IMO MCOR-3-74 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 help 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.
| Current | 74 A |
|---|---|
| Phase | Three Phase |
| Series | MCOR Thermal Overload Relays |
| Product type | Thermal overload relay |
| Adjustable current range | 63 - 74A |
| 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 | 74A maximum |
| Standards | IEC/EN 60947-4-1 |
| Approvals | CE, UL, cUL, RoHS compliant |
| HS Code | 8536303000 |
| Country of Manufacture | Austria |
This thermal overload relay protects industrial motors against overload conditions and phase failure in motor starter applications.
The MCOR-3-74 has an adjustable overload protection range from 63 to 74A.
This overload relay is designed for use with IMO MC50 to MC74 contactors.
The relay includes integrated 1 normally open and 1 normally closed auxiliary contacts for signalling and control circuits.
The MCOR-3-74 uses a compact plug-in contactor mounting configuration for direct installation onto compatible IMO contactors.
IMO MCOR thermal overload relays are trusted throughout industrial automation systems for dependable motor protection, reliable overload detection and long-term operational performance.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...