Aprilaire 50
Aprilaire Current Sensing Relay for 24v Humidifier Control

Genuine Aprilaire 24 volt, 0.5 amp current sensing relay. This relay will switch on a 24 vac load (0.5 amp max load) when 4 amps of (blower motor) current is sensed. The pair of wires is 20 awg with a 24" length. Dimensions 2-3/4" wide x 1-7/16" high x 1" thick.

This 24 volt relay is for turning on a 24 vac load such as a humidifier, the 24 vac rating does not refer to the blower voltage. The blower voltage can be 120v or 240v as only the current is sensed. The need to wrap the blower wire around the RP-50 is typical, see instructions.

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