Supco SHP610420 High Pressure Switch, 610 PSI Cut-Out / 420 PSI Cut-In, SPST

Description

The Supco SHP610420 is a high pressure switch engineered to protect refrigeration and HVAC systems from dangerous over-pressure conditions. Designed to open on pressure rise, this single-pole single-throw (SPST) switch automatically interrupts the circuit when system pressure reaches the cut-out set point, then re-establishes the circuit once pressure drops back to the safe cut-in level.

How It Works

As a normally closed, open-on-rise pressure switch, the SHP610420 monitors refrigerant-side high-side pressure continuously. When pressure climbs to the 610 PSI cut-out threshold, the switch opens and breaks the control circuit — shutting down the compressor or triggering a safety lockout. The switch automatically resets and closes at 420 PSI, restoring normal operation once safe pressure levels are re-established.

Key Specifications

• Cut-Out (Open) Pressure: 610 PSI
• Cut-In (Close) Pressure: 420 PSI
• Switch Action: Open on Pressure Rise
• Switch Type: SPST (Single-Pole, Single-Throw)
• Brand: Supco
• SKU / Part Number: SHP610420

Features & Benefits

• Protects compressors and refrigeration circuits from high-pressure damage
• Automatic reset at 420 PSI cut-in for reliable, hands-free recovery
• SPST design simplifies wiring and integration into existing control circuits
• Durable construction suited for demanding HVAC and refrigeration environments
• Direct replacement for compatible Supco SHP-series high pressure switches

Typical Applications

• Commercial and residential air conditioning systems
• Refrigeration compressor protection circuits
• Heat pump high-side pressure monitoring
• Chiller and condensing unit safety controls