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3G Electric
TACO SR502-5 2-Zone Switching Relay, 120V AC Primary, 24V AC Secondary, 6 A FLA - Zone-Switching Relays
TACOZone-Switching Relays

TACO SR502-5 2-Zone Switching Relay, 120V AC Primary, 24V AC Secondary, 6 A FLA

The TACO SR502-5 is a 2-zone switching relay designed for HVAC zone control, operating with a 120V AC primary and 24V AC secondary. It supports a full-load amperage (FLA) rating of 6 A at 120V AC. This zone-switching…

SKU 3G-OTH-67191

Also listed as: SR5025 · SR502 5

Brand
TACO
Item
SR502-5 2-Zone Switching Relay, 120V AC Primary, 24V AC Secondary, 6 A FLA
Part Number
SR502-5
Category
Zone-Switching Relays
Available to Order
Also known as:SR502-5TACO
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
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Technical Specifications

TACO
Manufacturer Part Number
SR502-5
Number of Zones
2
Current Ratings @ Voltages
FLA: 6 A @ 120V AC

Technical Documents

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TACO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The TACO SR502-5 is a 2-zone switching relay designed for HVAC zone control, operating with a 120V AC primary and 24V AC secondary. It supports a full-load amperage (FLA) rating of 6 A at 120V AC. This zone-switching relay provides straightforward on/off switching for two zones.

Frequently Asked Questions

What is the TACO SR502-5 zone switching relay used for?

The TACO SR502-5 is used for HVAC zone control, providing on/off switching for two heating or cooling zones. It is commonly installed in residential and light commercial systems to manage zone valves or circulator pumps, ensuring independent temperature control in different areas of a building.

What are the specifications of the TACO SR502-5?

The TACO SR502-5 is a 2-zone switching relay with a 120V AC primary and 24V AC secondary. It has a full-load amperage (FLA) rating of 6 A at 120V AC. The manufacturer part number is SR502-5, and it is designed for straightforward on/off switching for two zones.

Where to buy the TACO SR502-5 worldwide?

You can source the TACO SR502-5 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide reliable sourcing for this zone switching relay.

How to install the TACO SR502-5 zone switching relay?

Install the TACO SR502-5 by mounting it securely and connecting the 120V AC primary power and 24V AC secondary control wiring per the wiring diagram. Ensure all connections match the zone valve or circulator specifications. Follow standard HVAC safety practices, including disconnecting power before installation.

Used in

Common applications for TACO
Hydronic heating systems — Taco 49-150T-2 inline air separator removes entrained air to maintain loop efficiency.
Domestic hot water recirculation — Taco HLS-1 under-sink pump reduces wait time at fixtures in residential buildings.
Chilled water cooling loops — Taco SFL-150S isolation flange allows equipment service without system drain.
Circulator pump maintenance — Taco 110-009RP motor coupler restores torque transfer in Series 110 pumps.
Water/glycol systems — Taco 49-200T-2 air separator handles 2 in NPT connections at 150 psi and 240°F.
Commercial hydronic balancing — Taco air separators and isolation flanges support efficient fluid control and serviceability.
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TACO Products

3G Electric supplies TACO zone-switching relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Zone-switching relay for hydronic heating systems. Provides 3 zones with priority, operating on 120V AC primary supply. Supports full-load amperage of 20 A at 120V AC. Switches circulator pumps or valves based on thermostat calls

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