Thermal overload relay for MC9b-40a contactor series MT current 0.16-0.25A MT-32 22-32A

Motor and Circuit Protection – Thermal Relay MT-32

This MT series thermal relay, designed to work with MC9b-40a contactors, provides reliable protection against overloads in AC circuits and motors. Designed to operate in the current range of 22-32A, it effectively protects against damage caused by excessive load, phase failures, prolonged starts or motor blockage. This is a key element of any electrical installation where high reliability and safety are required.

Construction and application

The MT-32 relay is a bimetallic element that reacts to temperature increases caused by excessive current flow. Its design allows for direct mounting under the contactor or separately, using a dedicated mounting base UZ-63L – providing flexibility in choosing a solution for a specific application. Thanks to the integrated NO+NC auxiliary contacts, the relay can be used to signal an overload condition or to disconnect the circuit in the event of a failure. A wide range of overcurrent release settings (22-32A) allows for precise adjustment to the characteristics of the protected circuit.

Key features and benefits

• Wide range of applications: ideal for protecting motors with a power adapted to the current range of 22-32A.
• Compatibility: designed to work with LS MC 12A-40A contactors, making selection and integration into existing installations easier.
• High reliability: bimetallic construction ensures precise and repeatable response to overloads.
• Flexible mounting: direct mounting or using the UZ-63L base.
• Integrated auxiliary contacts: facilitate the implementation of signaling and protection functions.
• Durability: Operation at temperatures from -5°C to 60°C and IP20 protection class guarantee reliable operation in various environmental conditions.
• Safety: Protects motors and circuits from damage caused by overloads, which translates into longer device life and minimizes downtime.

Thanks to this thermal relay, you can be sure that your electrical installations are properly protected against the effects of overloads, which translates into continuity of operation and minimization of repair costs.