Northfield, Ill. – Magnecraft & Struthers-Dunn's four-pole double-throw (4PDT) relay comes in 1-, 3- and 5-amp contact ratings. With terminals sealed in a glass beaded header that's soldered to a ...

In the used-to-be days, we”d get a Bud box, some Greenlee punches, a box o” wire, parts to construct a 24-volt DC power supply, a handful of 24-volt 4PDT relays, grab a cup of coffee, and head for the ...