The Model 280 and 281 General Purpose Plug-In Relays are heavy duty, high quality relays available at a competitive price. UL Recognized and CSA approved, the Model 280 and 281 have a long life of over 10 million mechanical operations. Model 280 and 281 relays are available in a variety of AC and DC voltages. Mounting configurations are standard 8- and 11-pin.