Omron Motor Protection Unit 2.5 - 4A, 400V, Class 10, IP20, 3 Poles J7MN

Omron J7MN-3R-4 Motor Protection Unit is engineered to provide robust protection for industrial three-phase induction motors. With an adjustable current setting between 2.5A and 4A and a rated supply voltage of 400V, this device is ideal for automation, electrical panels, and motor-driven equipment across manufacturing and commercial sectors.

The unit employs a Class 10 protection system ensuring accurate response during overloads and fault conditions, reducing risk of motor overheating and damage. Its current sensing mechanism promptly detects abnormal load currents, facilitating precise isolation of faulty motors.

Featuring a fixed short-circuit release set at 13 times the rated current, the J7MN-3R-4 allows quick disconnection to mitigate equipment damage. Its undervoltage release mechanism guarantees safety by preventing unintended motor restarts after power restoration.

Compact dimensions (105mm length, 45mm width, 100mm depth) enable easy integration into plant and control cabinets. Rated for IP20 ingress protection, the unit ensures compliance with standard industrial safety requirements.

Reliable circuit breaker design combining overload and fault protection. Supports wide operating temperature range of -20°C to 60°C. Designed for use in environments demanding strict safety standards, such as industrial manufacturing and water treatment facilities.

Ideal for applications where continuous motor protection and operational safety are essential.

Typical industrial applications include control panels, conveyor systems, HVAC equipment, pumps, compressors, and machinery in sectors such as manufacturing, water treatment, and commercial automation. Use cases benefit from the accurate protection against overloads, short circuits, and safe restart prevention.

Choose Omron for reliable motor protection solutions. Browse our Motor Protection Units category for additional product variants and accessories.