Taco SR501-5 - 1 Zone Switching Relay w/Fused Outputs

The Taco SR501-5 is a next-generation single-zone switching relay designed to control circulators in hydronic heating systems. Built for fast installs and easy troubleshooting, it features clearly labeled wiring, external diagnostic lights, and a compact enclosure. Ideal for residential and light commercial applications, this relay provides reliable zone control while integrating seamlessly with a wide range of thermostats and boilers.

Features

Manufacturer: Taco Comfort Solutions
Part Number: SR501-5
Application: Single-zone switching relay for hydronic heating systems
Voltage: 120V power input with 24V thermostat compatibility
Compatible with conventional, programmable, and WiFi thermostats
Controls circulators or zone valves in heating systems
External diagnostic indicator lights for quick system status and troubleshooting
Built-in priority protection and isolated end switch for boiler activation
Fuse protected with sealed relay for long-term durability
Contractor-friendly PC board layout for simplified wiring and installation
Compact design suitable for residential or light commercial applications
UL listed for safety and reliability

Applications

Hot Water Heating Systems
Closed Cooling Circuits
Air Conditioning Systems
Hydronic Heating & Cooling
Water/Glycol concentrations up to 50%
Solar / Geothermal

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Collection: Taco Switching Relays

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SR501-5 - 1 Zone Switching Relay with Fused Outputs