Supco SMR575 575 PSI Manual Reset High Pressure Switch, R410A, SPST

Description

The Supco SMR575 is a high pressure safety switch engineered for R410A refrigeration and air conditioning systems. Designed to open on pressure rise, this switch provides reliable over-pressure protection by cutting out at 575 PSI, helping safeguard compressors and system components from damaging high-pressure conditions. The manual reset (MR) design ensures that a technician must physically reset the switch before the system can restart, preventing repeated cycling under fault conditions and prompting proper diagnosis before returning the system to operation.

Key Features

• 575 PSI cut-out set point — opens on pressure rise to protect the system
• Manual reset (MR) operation — requires technician intervention before restart
• SPST (Single Pole, Single Throw) switching action
• Designed specifically for R410A refrigerant applications
• Helps prevent compressor and system damage from high-pressure faults
• Promotes safe, code-compliant system operation

Application

The SMR575 is ideal for use in residential and light commercial split systems, heat pumps, and other R410A-based HVAC/R equipment where high-side pressure protection is required. Its manual reset feature makes it well-suited for installations where automatic restart after a pressure fault is not desired.

Specifications

• Brand: Supco
• Model: SMR575
• Cut-Out Pressure: 575 PSI (Open on Pressure Rise)
• Reset Type: Manual Reset (MR)
• Switch Type: SPST
• Refrigerant Compatibility: R410A