Schneider Electric RPM21B7 Zelio Power Relay Brand: Schneider Electric. Part Number: RPM21B7. Schneider Electric Square D Zelio Power Relay, Series: RPM, 15 A, 1.1 VA Power, 60 Hz Frequency, 24 V AC Coil, 2NO-2NC 2 Form C Contact Form, 2 Pole, DIN Rail/Flange/Plug-In/Socket Mounting, Faston/Flat Pin/Spade Terminal, IP20/IP40 Enclosure, -40 to 55 deg C, 1.54 in W x 1.06 in H x 0.83 in D Dimensions. Additional Description: SQD -RPM21B7 15A POWER RELAY 2C/O 24VAC. Catalog Description: plug-in relay, Harmony electromechanical relays, 15A, 2CO, lockable test button, 24V AC..