Eaton H2104B-3 Overload Relay

Product Description

The EATON H2104B-3 is a thermal overload relay element designed to protect motors and motor control circuits from sustained overcurrent conditions. It mounts to a compatible motor starter and trips the contactor when current exceeds the rated threshold, preventing motor burnout. Electricians and industrial maintenance technicians install this type of heater element as part of a full overload relay assembly in motor control centers, panels, and starter enclosures. The unit weighs 0.15 pounds and measures 1.8 x 1.8 x 3.1 inches, making it a compact fit for standard starter blocks.

This overload relay heater element is suited for use in motor control applications across light commercial and industrial settings. It is installed inside a matching EATON overload relay block as a replacement component when the original element has tripped beyond reset capability or has been damaged. Applications include HVAC fan and pump motors, compressor starters, and general three-phase motor control assemblies where overcurrent protection is required.

Key Features

• Thermal overload element provides reliable overcurrent protection for motor circuits
• Compact form factor at 1.8 x 1.8 x 3.1 inches fits standard EATON starter blocks
• Lightweight construction at 0.15 pounds for easy field handling and replacement
• Drop-in heater element style simplifies replacement without rewiring the full relay assembly

Compatibility

Designed as an OEM-style replacement heater element for use with compatible EATON overload relay blocks in motor control applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lock out the motor control circuit completely before accessing the starter enclosure or removing any relay components. Verify that the replacement heater element matches the required current rating for the connected motor load before reinstalling. Do not attempt to reset or reinstall a relay element while power is present.

Technical Specifications

• Dimensions (L x W x H): 1.8 x 1.8 x 3.1 inches
• Weight: 0.15 pounds
• UPC: 78211300475

Standard Information

• Brand: EATON
• Manufacturer Part Number: H2104B-3