Value Brand
Value Brand Transformer Relay SPNO/SPNC 12 A 120 V 6 A 240 V
Controls cooling and heating circuits with dual SPNO/SPNC contacts rated 12 A at 120 V and 6 A at 240 V
- Handles 12 A at 120 V AC for cooling and heating circuits
- 15 A resistive rating at 120 V AC supports higher steady loads
- 60 A locked-rotor current at 120 V AC manages motor starts
- 6 A at 240 V AC with 35 A locked-rotor for dual-voltage use
- Two SPNO/SPNC relays in one surface-mount unit simplifies wiring
Transformer Relay for HVAC Control
This transformer relay switches heating and cooling circuits in residential and light-commercial HVAC systems. It provides two relays with SPNO and SPNC contacts rated for 12 A at 120 V AC and 6 A at 240 V AC. Surface mounting and screw terminals suit panel builders and service technicians who need a compact, DIN-rail alternative.
Contact Ratings and Motor Load Limits
The relay handles a resistive load up to 15 A at 120 V AC, while full-load motor current is 12 A at 120 V AC and 6 A at 240 V AC. Locked-rotor inrush reaches 60 A at 120 V AC and 35 A at 240 V AC, so the contactor must be sized for the compressor or blower motor's starting surge, not just its running current.
Surface Mount with Screw Terminals
Installation uses four screw terminals for line, load and coil connections on a flat surface. The 1 in depth fits shallow panels, but the 4 in square footprint requires clearance for wiring bend radius. Common issues include over-tightening terminal screws, which can crack the plastic base, and reversing coil polarity on DC control circuits.
Highlights
- Handles 12 A at 120 V AC for cooling and heating circuits
- 15 A resistive rating at 120 V AC supports higher steady loads
- 60 A locked-rotor current at 120 V AC manages motor starts
- 6 A at 240 V AC with 35 A locked-rotor for dual-voltage use
- Two SPNO/SPNC relays in one surface-mount unit simplifies wiring
Specifications
| Brand | ZORO SELECT |
|---|
Questions about this item
What do the two current ratings 12 A at 120 V and 6 A at 240 V tell me about picking the right relay?
The relay handles 12 A full-load at 120 V AC and 6 A full-load at 240 V AC; choose the rating that matches your supply voltage and load current.
How do the 60 A and 35 A locked-rotor figures affect real-world motor starting?
The relay can withstand 60 A locked-rotor at 120 V AC and 35 A at 240 V AC, covering the brief inrush when a compressor or fan motor starts.
What does the screw-terminal connection mean for installation on a standard HVAC control board?
Screw terminals accept stripped wire directly, allowing secure surface-mount wiring without special connectors on the control board.
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