The GeneralAire 4751 is the correct replacement safety interlock switch for the following air cleaner models:
The GeneralAire R1-0202 Safety Interlock Switch is a replacement safety interlock switch for the GeneralAire GA50A14, GA50A20, and GA50A22 Electronic Air Cleaners. The GeneralAire R1-0202 safety interlock switch is installed on your humidifier's power box near the on/off switch. The GeneralAire 4751 is an OEM replacement part that allows your GA50A air cleaner to operate safely and at peak performance levels.
GeneralAire R1-0202 Safety Interlock Switch specifications: