Eaton D80JE22A Thermal Overload Relay

The Eaton D80JE22A is a thermal overload relay belonging to the D80 series, designed to protect three‑phase AC motors from damage due to overload, phase loss, or prolonged start. It directly mounts to Eaton D series contactors (e.g., D80) to form a compact motor starter. The relay uses a bimetallic strip mechanism with ambient temperature compensation to ensure accurate tripping even in varying environmental conditions.

Key Features

• Adjustable current setting range: 16‑22 A

• Class 10 trip characteristic (standard motor protection)

• Phase loss sensitivity (trips within 3 seconds)

• Ambient temperature compensation: -5 °C to +40 °C

• Manual/auto reset selection via front dial

• Trip indication (mechanical flag and auxiliary contact)

• Stop/test function for functional testing

• IP20 protection for finger‑safe terminals

Technical Specifications

Operation and Protection

When the motor current exceeds the set point for a period determined by the thermal characteristic, the bimetals deflect and trip the relay, opening the NC contact in the control circuit and stopping the contactor. The trip flag provides visual indication. Phase loss condition causes faster tripping because the remaining phases carry excessive current. The ambient compensation ensures the trip curve remains accurate regardless of surrounding temperature.

Applications

• Motor control centers (MCCs)

• Pump, fan, and compressor protection

• Conveyor systems

• HVAC equipment

• Small machine tools

Installation

The D80JE22A can be mounted directly onto a D series contactor using the integrated hook and screw, or mounted independently on a DIN rail using an adapter (sold separately). Wiring terminals are clearly marked and accept up to 10 mm² conductors. The front‑mounted dial allows easy adjustment without tools.

With its robust construction and reliable protection, the Eaton D80JE22A ensures long motor life and minimizes downtime in industrial applications.