IMO MCOR-4-90 thermal overload relay with adjustable 63-90A protection range for industrial motor control and heavy-duty motor starter applications.
£192.72
The IMO MCOR-4-90 is a robust thermal overload relay developed to provide dependable motor protection in demanding industrial motor control systems. Engineered for use with larger IMO MC series contactors, this overload relay protects motors against overload currents, overheating and phase failure conditions that can lead to costly downtime or equipment damage.
Part of the proven IMO MCOR overload relay range, the MCOR-4-90 combines reliable thermal protection with flexible adjustment settings and straightforward installation. The relay is designed for industrial machinery, automation equipment and OEM control panels requiring high-current motor protection.
With an adjustable current setting range of 63 to 90 A, the IMO MCOR-4-90 is ideal for larger three-phase motors used in pumps, compressors, conveyors, HVAC systems and heavy-duty industrial equipment. Its compact design and direct contactor mounting simplify control panel assembly while ensuring reliable operation in harsh industrial environments.
Thermal overload relays are essential for protecting electric motors against excessive current draw and overheating. By monitoring motor current continuously, the relay disconnects the motor circuit before thermal damage occurs, helping to extend equipment lifespan and reduce maintenance costs.
The IMO MCOR series is designed for industrial motor control systems requiring dependable protection and straightforward integration with contactors and starter assemblies. The MCOR-4-90 is particularly suited for larger motors operating in demanding industrial environments.
| Phase | Three Phase |
|---|---|
| Series | MCOR Thermal Overload Relays |
| Product type | Thermal overload relay |
| Adjustable current range | 63–90 A |
| Protection function | Thermal overload and phase failure protection |
| Reset type | Manual / automatic selectable |
| Auxiliary contacts | 1NO + 1NC |
| Trip class | Class 10A |
| Voltage rating | Up to 690 V AC |
| Number of poles | 3-pole |
| Mounting type | Direct mounting to compatible contactors |
| Connection type | Screw terminals |
| Operating temperature | Approx. -25°C to +60°C |
| Compliance | IEC motor protection standards |
| Weight | Approx. 0.45 kg |
| HS Code | 8536303000 |
| Country of Manufacture | Austria |
The relay provides thermal overload and phase failure protection for high-current industrial motors and motor starter systems.
The MCOR-4-90 features an adjustable overload current range of 63 to 90 A.
Yes, the relay supports both manual and automatic reset modes depending on application requirements.
The relay protects against motor overload conditions, overheating and phase failure.
The MCOR-4-90 is typically mounted directly to industrial contactors inside motor starter panels and automation control systems.
IMO thermal overload relays are widely used in industrial motor control systems to deliver dependable protection, long service life and reliable machine operation in demanding environments.
● 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...