Emerson Climate Technologies
Emerson Climate Technologies White-Rodgers 90 118ES1 Transformer Relay 24V
A 24 V transformer relay with two SPDT contacts, rated 13.8 A at 120 V and 6.9 A at 240 V for heating control panels
- 24 V coil voltage suits low-voltage control circuits
- SPST power contacts switch 13.8 A at 120 V AC
- SPDT low-voltage contacts provide flexible switching logic
- Through-panel mounting enables secure chassis installation
- Dual-relay design handles separate load circuits
HVAC Transformer Relay for Heating Control
The Emerson White-Rodgers 90 118ES1 is a transformer relay designed for heating applications. It operates on a 24 V control circuit and provides two relays with SPST and SPDT contact forms. The unit mounts through a panel and connects via four hardwired pins. It suits technicians replacing or installing low-voltage switching in residential or light-commercial HVAC systems.
Current and Voltage Limits Define Safe Use
The relay handles a full-load current of 13.8 A at 120 V AC and 6.9 A at 240 V AC. Locked-rotor ratings are 82.8 A at 120 V AC and 41.4 A at 240 V AC. Horsepower is not rated at either voltage. These electrical limits determine the maximum motor or compressor load the contacts can switch without damage.
Dual-Relay Configuration Is the Deciding Factor
This model contains two relays in one housing, offering both a normally closed/normally open power contact and a separate SPDT low-voltage contact. Builders who need only a single-pole relay or a different contact arrangement should choose another part. The four-pin, through-panel mounting must also match the existing control board layout.
Highlights
- 24 V coil voltage suits low-voltage control circuits
- SPST power contacts switch 13.8 A at 120 V AC
- SPDT low-voltage contacts provide flexible switching logic
- Through-panel mounting enables secure chassis installation
- Dual-relay design handles separate load circuits
Specifications
| Brand | WHITE-RODGERS |
|---|
Questions about this item
Which version of the White-Rodgers 90 118ES1 relay should I choose for a 24 V control circuit?
The 90 118ES1 is a single 24 V coil model with dual SPST/SPDT contacts; no other voltage or contact variants are listed for this part number.
What does the 13.8 A full-load rating at 120 V AC mean when the relay is installed?
It indicates the maximum continuous current the power contacts can switch on a 120 V AC heating load without exceeding temperature limits.
How does the hardwired connection and 4-pin layout limit installation options?
The relay mounts through a panel and requires four hardwired terminations — two for the 24 V coil and two for the switched line-voltage circuit.
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