Eaton Overload Relay 1 NO/1 NC 2.4 - 4A F.L.C, 4A Contact Current, 6W Power, 500V AC Control Voltage 278438 ZB12-4

Eaton 278438 ZB12-4 Overload Relay is a robust motor protection relay designed to protect motors against overcurrent and thermal overload in industrial applications. Suitable for direct mounting on compatible contactors, this relay supports a motor full load current (FLC) range adjustable from 2.4 to 4 amperes, with a relay contact current rating of 4 amperes and a power rating of 6 watts. Control voltage is rated at 500V AC, enabling reliable operation in demanding electrical environments.

The relay features both automatic and manual reset methods, which help minimize equipment downtime by allowing easy resetting after an overload condition has been cleared. The bimetallic mechanism ensures a trip response time between 2 and 10 seconds for effective motor protection. Designed for durability, the unit complies with stringent standards including CSA, CE, UL, VDE, and IEC/EN certifications, ensuring safety and performance in industrial applications.

Its construction includes screw terminals for secure and reliable electrical connections, and the IP20 rating protects against solid objects larger than 12 mm, making it suitable for typical industrial environments. The operating temperature range from -5°C to 55°C broadens its usability in harsh and varied climates. Eaton's direct mount design ensures compact installation alongside the DILM contactor range, offering seamless integration in automation and control gear assemblies.

Additionally, this overload relay is designed to provide electrical isolation up to 440V AC in compliance with EN 61140, safeguarding both equipment and users against electrical faults. The modular design and durable materials resist corrosion, thermal overload, and UV radiation, contributing to long-term reliability even in challenging settings.

Designed for direct contactor mounting for space-saving installations. Automatic and manual reset options reduce maintenance downtime. Motor FLC adjustable between 2.4 and 4 amperes for precise protection. Relay contact current rated at 4 amperes ensures consistent load handling.

Compact dimensions support integration in tight panel layouts. Operating temperature range -5°C to 55°C supports industrial environments. Certified to multiple safety and performance standards including CSA, CE, UL, VDE, IEC/EN.

Electrical isolation up to 440V AC as per EN 61140 enhances operator safety. Bimetallic trip mechanism provides reliable thermal overload protection. Durable against corrosion, thermal stress, and UV exposure for reliable operation.

This Eaton Overload Relay is ideal for use in industrial motor control and protection circuits, manufacturing equipment, HVAC systems, and automation machinery. Its proven design offers dependable safeguarding of motors from overcurrent and thermal damage, while facilitating quick recovery and minimal disruption during overload events.

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