Supco ml50 Defrost Thermostat 50F Open 30F Close

Product Description

The SUPCO ml50 is a defrost thermostat rated to open at 50 degrees F and close at 30 degrees F. This bimetal-style limit device interrupts or restores the defrost circuit based on coil temperature, preventing over-defrost and protecting evaporator components. It is a common service part in residential and light-commercial refrigeration systems, installed by appliance technicians and refrigeration mechanics during routine defrost system maintenance or component replacement.

The ml50 is suited for use in refrigerators, freezers, and reach-in coolers where a two-temperature defrost cutout is required. It terminates the defrost cycle when the coil reaches 50 degrees F and resets at 30 degrees F, maintaining proper defrost timing and coil condition. It is appropriate for applications requiring a low-profile, clip-on or wire-mount thermostat in the evaporator section.

Key Features

• Opens at 50 degrees F to terminate the defrost cycle
• Closes at 30 degrees F to allow defrost circuit to reset
• Designed for evaporator coil mounting in refrigeration equipment
• Serves as a direct service replacement for defrost thermostat applications

Compatibility

Designed as an OEM-style replacement defrost thermostat for residential and light-commercial refrigeration equipment requiring a 50 degrees F open and 30 degrees F close rating.

Installation Notes

Installation is typically performed by a qualified appliance technician or refrigeration mechanic. Disconnect power to the refrigeration unit before removing or installing any defrost circuit components. The thermostat is mounted directly to or near the evaporator coil and must make solid thermal contact to operate accurately. Verify the replacement rating matches the original equipment specification before energizing the unit.

Technical Specifications

• Open Temperature: 50 degrees F
• Close Temperature: 30 degrees F

Standard Information

• Brand: SUPCO
• Manufacturer Part Number: ml50