1-Zone Switching Relay
Brand: Taco
Part#: SR501-4
In Stock
Usually ships: within 1 business days
Taco SR501 Single zone switching relay is a standard equipment for every installer. It can easily replace any brand made by any manufacturer, and will even fit into the existing metal enclosure without rewiring incoming connections. The SR501 single zone switching relay is UL and CSA listed, uses a standard “ice cube” replaceable relay and is compatible with conventional and programmable thermostats. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups.

  • External Indicator Lights
  • Switchable Priority
  • Simplified Wiring
  • Fully Enclosed Snap-Out Relays
  • Compact Design
  • Fuse Protected
  • 100% Factory Tested
  • Isolated End Switch
  • Contractor Friendly PC Board Layout
  • Universal Thermostat Compatibility
  • UL and CSA Approved
  • 24 Volt Power Input or Output Terminal
  • Extended 3 Year Warranty
  • Made in the USA.
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Technical Specifications:
  • Zones: 1
  • Power: 120VAC
  • Max combined load: 5.0 AMPs
  • Dimensions: 4.25" wide x 5.25" high x 2.75" deep.
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Verified Purchase
Taco relay is great!
Great product!
By Mitch,plumber (from Los Angeles, CA) on 10/05/2016
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Verified Purchase
good quality works great
Good relay easy to hook up with several wiring options good company to work with. Fast shipping.
By Verified Buyer on 01/24/2016
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Verified Purchase
excellent company to deal with, very fast shipping.
excellent company to deal with, very fast shipping.
By Dan (from 14843) on 11/26/2015
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Verified Purchase
Quality product
A little pricey, but a good unit.
By Verified Buyer on 05/14/2015
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i got it delivered very fast
it was very easy to install it, no problem at all.working good
By john v. (from vestal ny) on 02/15/2012
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Verified Purchase
Works well and looks good
I bought the switching relay to replace the old 20 year old relay, since it did not seem to work anymore. Installing the Taco SR501 was a breeze. I ran new wire (T-Stat, to Boiler, and new power supply) and installed everything in about an hour. Works like it's supposed to!
By Peter (from New Jersey) on 02/01/2012
Ask a Question
I have a sr504 relay control. I need to add 1 more zone. Can I use a sr501 and add it to the sr504? Thanks for your answer.
Helpful? Yes No
Only -EXP Taco switching relay models are expandable. Regular models, including this one cannot be expanded. Also note that in order to expand an existing -EXP control, your second controls also has to be the -EXP model.
By PexUniverse Customer Service on 12/10/2013

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