Eaton Three-Pole Thermal Overload Relay, NEMA Starter-Mounted, Class 20

Eaton Three-Pole Thermal Overload Relay, NEMA Starter-Mounted, Class 20

The Eaton Three-Pole Thermal Overload Relay is a NEMA-design, starter-mounted overload relay built for reliable motor protection in industrial and commercial control applications. Featuring a Thermal Type B, Class 20 trip mechanism and a full load current range of 19-135A, this relay is engineered as a direct replacement for Type A overload relays operating in manual reset mode (3-pole only). It is UL Listed for code-compliant installations and ships complete with a contactor mounting bracket, overload relay, and connection straps to the contactor.

Key Features

• Three-Pole Configuration: Designed for three-pole motor circuits requiring balanced thermal overload protection.
• Starter-Mounted Design: Mounts directly to the starter and includes a contactor mounting bracket, overload relay, and connection straps to the contactor for a complete replacement solution.
• Full Load Current Range: Rated for 19-135A, covering a wide span of motor protection applications.
• Trip Type: Thermal Type B, Class 20 trip characteristic for dependable overload response.
• NEMA Design: Built to NEMA standards for use in North American industrial control systems.
• Modification: Includes 1NC auxiliary contact and ambient-compensated construction for stable performance across varying temperatures.
• Special Feature: Heaters required for operation, allowing current range matching to the specific motor application.
• Compact Footprint: Measures 6 in wide x 8.2 in long/deep x 5.1 in high.

Certifications & Compliance

• UL Listed
• NEMA Design

Technical Specifications

• Number of Poles: Three-pole
• Product Width: 6 in
• Product Length/Depth: 8.2 in
• Product Height: 5.1 in
• Type: A200
• Mounting: Starter
• Full Load Current Range: 19-135A
• Trip Type: Thermal Type B, Class 20
• Design: NEMA
• Modification: 1NC Auxiliary Contact, Ambient Compensated
• Special Features: Heaters required
• Department: Electrical

Typical Applications

• Motor Control Centers and Starter Panels
• Three-Pole Motor Overload Protection
• Replacement for Type A Overload Relays in Manual Reset Mode
• Commercial and Industrial Electrical Installations
• Retrofit and Renovation of Existing Motor Control Systems

Why Eaton?

Eaton's Three-Pole Thermal Overload Relay combines a NEMA-compliant, UL Listed design with an ambient-compensated build and Class 20 thermal trip response for dependable motor protection. With a complete starter-mounting kit and a broad 19-135A full load current range, it delivers a straightforward, code-compliant replacement path for Type A overload relay systems in professional electrical installations.