Taco SR502 Switching Relay

The Taco SR502 Switching Relay is a compact, fully enclosed DPDT switching relay designed for boiler, circulator, and hydronic systems. This 2-zone, electronically actuated unit delivers reliable control with switchable priority, simplified wiring, and a rugged NEMA 1 enclosure. With a 1/3 HP, 120 volt AC (60 Hz) input and current ratings of 15 Amp combined, 6 Amp full load, and 36 Amp locked rotor, it handles demanding duty. Its compact footprint measures 12-1/4 inch width by 3 inch depth by 8 inch height, making installation easy in tight equipment spaces. Applications include boilers, circulators, and hydronic systems, and it is UL and CSA listed for safety and reliability.

• External Indicator Light
• Switchable Priority
• Simplified Wiring
• Fully Enclosed Snap-Out Relay
• Compact Design
• Fuse Protected
• 24 Volt AC 1 Amp Isolated End Switch
• Contractor Friendly PC Board Layout
• 24 Volt AC Class 2 Universal Thermostat Compatibility
• 24 Volt Power Input/Output Terminal

Enclosure rating NEMA 1 completes the rugged, safe package, while UL and CSA standards ensure dependable performance in professional hydronic installations.