3PDT

AcronymDefinition
3PDTThree Pole, Double Throw (switch)
References in periodicals archive ?
Octal relays and bases (both 8- and 11-pin) comprises the PR3 Series, in 10A DPDT and 10A per pole 3PDT versions with AC or DC coil voltages.
Octal relays are available in 24 VAC or VDC (2PDT or 3PDT), 120 VAC (2PDT or 3PDT), and 240 VAC (2PDT or 3PDT) models.
Reed relays are much more expensive in SPDT, DPDT, 3PDT and 4PDT configurations.