90384 – RELAY (SPST, 240V COIL)

Switching fan relay in the Type 184 form factor, with a 208/240 VAC coil and one normally-open plus one normally-closed contact set (SPNO/SPNC). Used to switch blower motors, solenoids and fan circuits from a line-voltage signal. Packard catalogs it as PR384; 90384 is the industry number the same relay is sold under by Packard, Mars, Supco and Sealed Unit Parts.

Specifications

Before you order

Check the coil voltage before you wire this in. This relay has a 208/240 VAC coil, not 24 V. If you need the 24 volt version of the same Type 184 relay it is Packard PR380 (industry 90380), and the 120 volt version is PR382. They look identical and they are not interchangeable — feeding 24 V to this coil does nothing, and feeding 240 V to a 24 V coil destroys it.

We stock this as the replacement for the Lennox fan relay 104774-01, Lennox catalog number 15D60, which LennoxPros publishes as “Relay Fan 208/240V” — that is what confirms the coil voltage here.

Specs

• Coil voltage208/240 VAC, 50/60 Hz
• Coil data6050 ohms DC resistance, 12.5 mA nominal
• Contact arrangementSPNO / SPNC
• Contact rating25 A resistive; 14 FLA / 84 LRA at 125 V; 8 FLA / 48 LRA at 250 V
• Terminals1/4 in. quick connect
• DutyContinuous
• Packard catalog numberPR384
• Equivalent numbersWhite-Rodgers 90-384, industry 90384

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 15D60

Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.

What is the difference between a fan relay and a contactor?

Duty and scale. A fan relay switches a blower or an accessory at a few amps off a 24 volt pilot duty coil. A contactor switches a compressor and condenser fan and is built for that inrush and arcing. A relay is not a small contactor. Use one as a contactor and it will pit and weld shut.

How do I pick the right replacement relay?

Match four things: coil voltage, contact arrangement, contact rating and the mounting. A White-Rodgers 90-370 is a Type 184 SPDT with a 24 VAC coil around 77 ohms DC resistance. A 90-340 is a Type 91 DPDT with a 24 VAC coil around 175 ohms. They look alike and are not interchangeable. SPDT gives you one normally open and one normally closed set, DPDT gives you two of each.

How do I test one?

Ohm the coil first, because an open coil is a dead relay. Then energize the coil with 24 volts, listen for the pull-in, and ohm the normally open contacts closed and the normally closed contacts open. A relay that clicks but will not pass current has burnt contacts, and that reads as a dead blower even though the control board is fine.

Why did the relay burn up?

Usually the load, not the relay. A blower drawing high amps because the run capacitor is weak or the wheel is caked with dirt pits relay contacts quickly. Fix the load or you will be back for another relay before the season ends.