Eaton H2109B-3 Overload Relay

Product Description

The EATON H2109B-3 is a thermal overload relay designed to protect motors and electrical equipment from sustained overcurrent conditions. It monitors current draw and trips the control circuit when heat buildup indicates an overload, preventing motor winding damage. This type of relay is a standard component in motor starter assemblies used across commercial and industrial electrical systems. Licensed electricians and industrial maintenance technicians are the primary installers and service personnel for this class of device.

The H2109B-3 is suited for use in motor control center (MCC) assemblies and combination motor starters in commercial and light industrial applications. It is typically installed in conjunction with a contactor to form a complete motor starter. Typical applications include HVAC fan and pump motors, compressor circuits, and general-purpose three-phase motor control panels.

Key Features

• Thermal overload protection guards motors against sustained overcurrent and heat damage
• Compact form factor at 1.6 inches x 1.7 inches x 3.1 inches for panel-efficient installation
• Lightweight construction at 0.25 pounds for easy handling during retrofit or new installation
• Designed for integration with compatible motor starters and contactors
• Provides automatic trip function to interrupt control circuit on overload condition

Compatibility

Designed as an OEM-style overload relay for use in motor starter assemblies. Refer to EATON documentation to confirm specific contactor and starter series compatibility before installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lock out the motor control panel before removing or installing the overload relay. Verify the trip class and current range of the relay match the motor nameplate FLA before placing the circuit back in service. Do not bypass or jumper the overload relay contacts during testing.

Technical Specifications

• Length: 1.6 inches
• Width: 1.7 inches
• Height: 3.1 inches
• Weight: 0.25 pounds
• UPC: 78211300480

Standard Information

• Brand: EATON
• Manufacturer Part Number: H2109B-3