Value Brand
Value Brand Transformer Relay SPDT 12A 120V 6A 240V
A SPDT transformer relay for cooling and heating systems switches 12 A at 120 V AC and 6 A at 240 V AC with screw terminals and surface mounting
- SPDT contact form enables versatile switching for heating and cooling circuits
- 12 A full-load rating at 120 V AC handles standard HVAC loads
- 15 A resistive load rating at 120 V AC supports higher non-inductive currents
- 60 A locked-rotor rating at 120 V AC manages motor inrush surges
- Surface mounting with screw terminals simplifies panel installation
Application Scope
This transformer relay is designed for controlling cooling and heating equipment in HVAC systems. It uses a single-pole double-throw contact arrangement to switch one circuit between two paths. The unit is built for surface mounting and connects via screw terminals. It suits technicians wiring or replacing control relays in residential or light commercial climate installations.
Installation Checks
Verify that the control circuit voltage matches the coil rating before wiring. Confirm the load does not exceed 12 amps at 120 volts AC or 6 amps at 240 volts AC for full-load operation. Resistive loads at 120 volts AC must stay within 15 amps. Ensure the mounting surface accommodates the four-inch depth and width, and that screw-terminal connections are accessible for the wire gauge used.
Sustained Load Behaviour
Under continuous operation the relay handles its rated full-load currents without exceeding temperature limits. The contacts are rated for locked-rotor inrush of 60 amps at 120 volts AC and 35 amps at 240 volts AC, accommodating motor startup surges. Screw terminals maintain secure connections through thermal cycling. The SPDT mechanism provides reliable changeover switching for extended duty cycles in heating or cooling control loops.
Highlights
- SPDT contact form enables versatile switching for heating and cooling circuits
- 12 A full-load rating at 120 V AC handles standard HVAC loads
- 15 A resistive load rating at 120 V AC supports higher non-inductive currents
- 60 A locked-rotor rating at 120 V AC manages motor inrush surges
- Surface mounting with screw terminals simplifies panel installation
Specifications
| Brand | ZORO SELECT |
|---|
Questions about this item
What comes in the box and do I need to buy screw terminals separately?
The relay ships as a single unit with screw-terminal connections built in; no extra terminals are required.
How do I decide between the 120 V and 240 V ratings?
Choose the voltage that matches your supply — 12 A full-load at 120 V AC or 6 A full-load at 240 V AC.
What does the 60 A locked-rotor rating mean when the relay is controlling a motor?
It guarantees the contacts can handle a 60 A inrush at 120 V AC during motor start-up without welding.
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