imo mcor-2-28 thermal overload relay for mc24-mc40 contactors 20-28 amps

Why Choose the IMO MCOR-2-28 Thermal Overload Relay?

The IMO MCOR-2-28 is a high-performance thermal overload relay engineered to provide reliable 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 extend motor life and reduce downtime in demanding industrial environments.

Part of the proven IMO MCOR overload relay range, the MCOR-2-28 features an adjustable current setting range of 20 to 28A, with star-delta protection support up to 35 to 48A. It includes manual and automatic reset functionality together with integrated 1NO + 1NC auxiliary contacts for flexible control circuit integration.

Its compact direct-mount design allows seamless installation onto compatible IMO contactors from the MC24 to MC40 range, creating a safe and efficient motor starter solution for industrial machinery, pumps, fans and automation equipment.

Key Advantages

• Reliable thermal overload motor protection for industrial applications.
• Adjustable overload range from 20 to 28A.
• Supports star-delta motor protection from 35 to 48A.
• Manual or automatic reset operation.
• 1NO + 1NC auxiliary contacts included.
• Compact direct mounting onto IMO MC contactors.

Key Features

• IMO MCOR thermal overload relay series.
• 20 - 28A adjustable current range.
• 35 - 48A YD star-delta protection range.
• Suitable for MC24 to MC40 contactors.
• Manual/automatic reset selector.
• 1NO + 1NC auxiliary contacts.
• Integrated thermal motor protection.
• Compact industrial direct-mount design.

Technical Specifications

• Manufacturer: IMO Precision Controls
• Series: MCOR Thermal Overload Relays
• Model: MCOR-2-28
• Product type: Thermal overload relay
• Adjustable current range: 20 - 28A
• Star-delta range: 35 - 48A
• Compatible contactors: IMO MC24 to MC40
• Auxiliary contacts: 1NO + 1NC
• Reset mode: Manual or automatic selectable
• Mounting type: Direct mounting or remote mounting using terminal block
• Number of poles: 3 pole
• Rated operational voltage: up to 690V AC
• Terminal type: Screw clamp terminals
• Protection function: Thermal overload and phase failure protection
• Flexible cable capacity: 0.75 - 6mm² power circuit
• Control circuit cable capacity: 0.5 - 2.5mm²
• Operating temperature: -25°C to +60°C
• Weight: approx. 0.3kg
• Standards: IEC/EN 60947-4-1
• Approvals: CE, UL, cUL, RoHS compliant

Reliable Motor Protection for Industrial Systems

Thermal overload relays such as the IMO MCOR-2-28 are designed to protect 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 and minimise costly downtime in industrial environments.

The MCOR range is specifically designed to integrate directly with IMO MC contactors, creating a compact and reliable motor starter assembly suitable for machinery, conveyors, HVAC systems and automation equipment.

Typical Applications

• Industrial motor starters.
• Pumps and ventilation systems.
• Conveyors and material handling equipment.
• HVAC and refrigeration systems.
• Industrial automation machinery.
• Three-phase motor protection systems.

Trusted by Industrial Automation Engineers

IMO MCOR thermal overload relays are widely trusted for reliable motor protection, compact integration with contactors and dependable long-term industrial performance.