5 out of 5
Product Description
Price is for each.
Manufacturer Part Number: SR502
TACSR502 Two Zone Switching Relay W/ Priority For Circulators
Part Description:
TACSR502 Two Zone Switching Relay W/ Priority For Circulators
Part Description:
- Switching Relay
- Item Switching Relay
- Type 2-Zone
- Actuation Type Electronic
- Switch Type DPDT
- Overall Dimensions 12-1/4 Inch Width x 3 Inch Depth x 8 Inch Height
- Current Rating 15 Amp (Combined Load), 6 Amp (Full Load) and 36 Amp (Locked Rotor)
- Input Supply Rating 1/3 HP, 120 Volt AC at 60 Hertz 1-Phase
- Inclusions/Features 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
- Application Boiler, Circulator, Hydronic System
- Applicable Standard UL, CSA
- Enclosure Rating NEMA 1
Features / Benefits
- Taco Switching Relays Combine Clearly Labeled PC Board Layouts with Advanced Features that Allow for Total System Customization
- Whether Using Basic Priority Switching or the Advanced Features of the-EXP Controls, the Job is Made Easy
- External Indicator Lights Provide Instant Diagnostic Feedback, Making a Snap of Service Calls or New Installation Start-Ups
- 100 Percent Factory Tested
- Made in USA
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
Note
This product is not eligible for coupon code discount, for we've been offering the best price in the market.
Need more information?
Our staff are available to answer any questions you may have about this item
Our staff are available to answer any questions you may have about this item
Customer Reviews
By A Customer
Date: October 01, 2025
Very simple to install, and works great
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By rentageek4u
Date: January 31, 2025
Have an older expensive Garmin smart thermostat that gets its power from a battery? This is the answer.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By David
Date: July 27, 2024
A little larger than expected but perfect for individual circulator control when 120V is needed. Some zone valves are lower voltage but when switching to pumps this is the correct relay.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Lenny Fontana
Date: May 09, 2022
Totally reliable and perfect for additional zones
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Steven A.
Date: January 09, 2022
I haven't installed it yet so I may add more to this review later. However, the package arrived in a timely manner with no apparent harm to the product.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Andriy L
Date: October 12, 2021
Recommend
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]