Thermal overload relay for MC9b-40a series contactor, current 0.4-0.63A MT-32 0.4-0.63A MT-32 0,4-0,63A

Motor and Electrical Circuit Protection

The MT-32 0.4-0.63A thermal overload relay is a reliable device used to protect electric motors and circuits from the effects of overloads. Designed to work with MC9b-40a series contactors, it provides effective protection against damage resulting from excessive load, phase failures, and prolonged starts. This is a key element of the electrical installation that minimizes the risk of downtime and costly repairs.

Construction and Application

The MT-32 relay uses a bimetallic operating principle, meaning it reacts to temperature changes caused by current flow. If the set tripping threshold is exceeded, the circuit is disconnected, protecting the connected devices. The ability to mount directly under the contactor or using a dedicated UZ-32S base (available separately) provides installation flexibility. The device is compatible with LS Metasol series contactors: MC-9b, MC-12b, MC-18b, MC-22b, MC-32a and MC-40a.

Key Features and Benefits

• Wide adjustment range: The relay allows precise setting of the tripping threshold in the range of 0.4 – 0.63A, adapting to the specifics of the protected installation.
• Multifunctionality: It has integrated auxiliary contacts (1NO+1NC) that can be used to signal the device status or remotely disconnect the circuit.
• Manual and automatic reset: Allows you to choose the method of returning the device to the ready state after activation - manually or automatically.
• Ambient temperature compensation: Ensures stable operation in a wide temperature range (from -5°C to 60°C), minimizing the impact of external conditions on the accuracy of operation.
• Easy installation: Direct or dedicated UZ-32S base mounting options make installation easier and faster.
• Safety and reliability: Compliance with safety standards guarantees protection of installations and devices against damage caused by overloads.
• Durable construction: Made of high-quality materials ensures long life and resistance to working conditions in an industrial environment.

Additionally, it is worth mentioning the breaking capacity of 10 and the insulation voltage of 690V, which confirms its solidity and intended use in demanding applications. This relay is an ideal solution for both professional installers and end-users looking for reliable protection of their electrical equipment.