C3-A30X / DC 24 V 24V dc Coil Non-Latching Relay 3PDT, 10A Switching Current Plug In. The RELECO MRC series 3-pole plug-in mount non-latching relay has a contact configuration of 3PDT. It is actuated with a 24VDC coil and 10A switching current. This relay has a test button, LED indicator and mechanical flag indicator. The test button is colour coded and dual function, push to test or lift to latch.