Square D 9065SEO12 Thermal Nema Overload Relay 600V

Product Description

The SQUARE D 9065SEO12 is a thermal NEMA overload relay rated for 600 VAC service, designed to protect three-phase motors from sustained overcurrent and overload conditions. It operates on the thermal sensing principle, using heat buildup generated by excess current to trip the relay and disconnect the load before winding damage occurs. This unit is NEMA Size 3, placing it in the mid-range of the NEMA overload relay family. Licensed electricians and industrial maintenance technicians install this relay as part of motor starter assemblies in commercial and industrial electrical panels.

This relay is suited for motor control center (MCC) applications and standalone NEMA motor starter configurations in commercial and light industrial settings. It is typically installed alongside contactors to form a full motor starter package. NEMA Size 3 sizing makes it appropriate for motors in the mid-horsepower range at standard industrial voltages. It is used in pump stations, HVAC systems with large fan motors, conveyor drives, and similar motor-driven equipment where overload protection is required by code.

Key Features

• Thermal sensing method detects sustained overcurrent without electronic components
• 600 VAC voltage rating covers standard industrial and commercial supply voltages
• NEMA Size 3 frame fits mid-range motor starter assemblies
• Replaces or upgrades overload relays in existing NEMA motor starter configurations
• Single-unit packaging allows direct replacement ordering without excess inventory

Compatibility

Designed as an OEM-style replacement thermal overload relay for NEMA Size 3 motor starter assemblies rated up to 600 VAC.

Installation Notes

Installation must be performed by a qualified electrician in accordance with NEC requirements for motor branch circuit and overload protection. De-energize and lock out the motor control panel before removing or installing the relay. Verify that the replacement relay NEMA size and voltage rating match the existing motor starter configuration before installation. Do not bypass or jumper the overload relay during testing.