imo mcor-4-120 thermal overload relay for mc90-mc115 contactors 80-120 amps

Why Choose the IMO MCOR-4-120 Thermal Overload Relay?

The IMO MCOR-4-120 is a dependable thermal overload relay engineered to protect industrial motors against overload currents, overheating and phase failure conditions. Designed for use with compatible IMO MC series contactors, this relay helps maintain safe and reliable motor operation in demanding industrial environments.

As part of the proven IMO MCOR overload relay series, the MCOR-4-120 combines robust thermal protection with straightforward installation and adjustable current settings. It is designed for industrial motor starter assemblies, OEM control panels and automation systems where dependable motor protection is essential.

With an adjustable current setting range of 80 to 120 A, the IMO MCOR-4-120 is suitable for protecting medium to large three-phase motors used in pumps, compressors, conveyors, ventilation systems and heavy-duty industrial machinery. Its direct mounting configuration simplifies panel assembly and reduces installation time.

Key Advantages

• Reliable thermal overload motor protection for industrial applications.
• Adjustable overload current range from 80 to 120 A.
• Provides overload and phase failure protection.
• Manual and automatic reset functionality.
• Integrated auxiliary contacts with 1NO + 1NC configuration.
• Designed for seamless integration with IMO motor contactors.

Key Features

• IMO MCOR thermal overload relay series.
• 80–120 A adjustable current range.
• Thermal overload and phase loss protection.
• Manual / automatic reset selection.
• 1 normally open and 1 normally closed auxiliary contact.
• Heavy-duty motor protection for industrial machinery.
• Compact design for motor starter assemblies.
• Trip Class 10A protection characteristics.

Technical Specifications

• Manufacturer: IMO Precision Controls
• Series: MCOR Thermal Overload Relays
• Model: MCOR-4-120
• Product type: Thermal overload relay
• Adjustable current range: 80–120 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. 0.52 kg

Reliable Protection for Industrial Motor Systems

Thermal overload relays monitor motor current continuously and disconnect the circuit if overload or overheating conditions occur. This protection helps prevent motor winding damage, equipment failure and costly downtime in industrial applications.

The IMO MCOR series is engineered for industrial motor control systems requiring dependable overload protection and long-term operational reliability. The MCOR-4-120 is ideal for medium and high-power motors operating in demanding industrial environments.

Typical Applications

• Industrial pumps and compressor systems.
• Conveyors and material handling equipment.
• HVAC and ventilation systems.
• Industrial processing machinery.
• OEM motor starter assemblies and MCC panels.
• Factory automation and industrial control systems.

Trusted by Industrial Engineers Worldwide

IMO thermal overload relays are widely used in industrial motor control systems to provide reliable motor protection, operational safety and dependable performance in demanding industrial environments.