The Alco 0715990 refers to the PS3-W6S pressure switch, a fixed-setting high-pressure control device used in refrigeration and HVAC systems.

 Key Specifications

• Model: PS3-W6S
• Function: High-pressure switch with automatic reset
• Pressure Range:
  • Cut-in: 21 bar (305 psi)
  • Cut-out: 25 bar (363 psi)
• Max Operating Pressure: 43 bar (620 psi)
• Test Pressure: 48 bar (695 psi)
• Temperature Range: –40°C to +150°C
• Electrical Ratings:
  • 6 FLA, 36 LRA at 120/240 VAC
  • 3 A at 230 VAC (AC15)
• Connection: 7/16"-20 UNF female thread with Schrader depressor and snubber
• Protection Class: IP65 (with compatible plug)
• Weight: ~130 grams
• Country of Manufacture: Czech Republic

 Features

• Compact design for direct compressor mounting
• Snubber-equipped for high-temperature applications
• SPDT micro-switch with snap action
• Gold-plated contacts for low-voltage applications
• TÜV-approved safety limiter (EN 12263 compliant)