CA4-40NK is a 4-pole front mounted auxiliary contact block equipped with Push-In Spring terminals. CA4-..N version offers terminal assortment matching the marking of 4-pole NF(C)(Z)(B)..K contactor relays. CA4-40NK is available with 4 N.O. instantaneous contacts for standard industrial environments. With the Push-in Spring terminals, one push is all you need for a faster than ever installation, an easier than ever wiring and a reliable as ever connection.