Eaton NEMA Overload Relay Heater Coil, Type A/B, Thermal-Fast Trip

Eaton NEMA Overload Relay Heater Coil, Type A/B, Thermal-Fast Trip

The Eaton NEMA Overload Relay Heater Coil is a Type A and B thermal-and-fast-trip heater element engineered for use with NEMA Starter Sizes 0, 1, and 2. Built to Eaton's NEMA design standard, this heater coil protects motor circuits by tripping the overload relay in response to sustained overcurrent conditions, helping safeguard connected motors from thermal damage. Its compact footprint — roughly 1.3 in wide, .8 in high, and 2.1 in deep — allows it to fit directly into Eaton A200/B100 series overload relay assemblies without modification.

Key Features

• Compact Dimensions: Product Width 1.3 in, Product Height .8 in, and Product Length/Depth 2.1 in for a precise fit inside Eaton A200/B100 overload assemblies.
• Overload Relay Type: Designed for Type A and B overload relays, providing thermal and fast trip response to overcurrent conditions.
• Starter Compatibility: Used with Starter Sizes 0, 1, and 2, making it a direct-fit replacement or upgrade heater element for these NEMA starter frames.
• NEMA Design: Manufactured to NEMA design standards for consistent performance in industrial and commercial motor control applications.
• FLA-Based Selection: Heater coils are selected based on the full load current (FLA) shown on the motor nameplate to ensure accurate overload protection.
• Rated for Standard Motor Conditions: Heater coils are rated to protect against a 40°C temperature rise with a 1.15 service factor.
• Phase-Specific Quantities: Single-phase motor circuits require 2 heater coils, while three-phase motor circuits require 3 heater coils for complete overload protection.
• Thermal and Fast Trip Protection: Combines standard thermal trip response with fast trip capability for improved motor circuit protection.

Technical Specifications

• Design: NEMA
• Overload Relay: Type A and B
• Trip Type: Thermal and Fast Trip
• Used With: Starter Sizes 0, 1, and 2
• Product Width: 1.3 in
• Product Height: .8 in
• Product Length/Depth: 2.1 in
• Department: Electrical
• Warranty: Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.

Typical Applications

• Motor Starter Overload Protection
• Industrial Motor Control Panels and Motor Control Centers
• Single-Phase and Three-Phase Motor Circuits
• Eaton A200/B100 Series Overload Relay Assemblies
• Commercial and Industrial Electrical Installations
• Motor Control Maintenance and Retrofit Projects

Why Eaton?

Eaton engineers its NEMA overload relay heater coils to precise dimensional and thermal tolerances, ensuring reliable, code-compliant motor overload protection across Starter Sizes 0, 1, and 2. With FLA-based selection guidance and clear phase-specific heater quantities, Eaton makes it straightforward for electricians and panel builders to match the correct heater coil to the application. Backed by Eaton's published Selling Policy 25-000 warranty, these heater coils are built for dependable performance in demanding industrial and commercial motor control environments.