ABB LTD GBCON 1SBH137001R1322 2NO + 2NC NF contactor relay is used for switching auxiliary and control circuits. NF contactor relays include an electronic coil interface accepting a wide control voltage Uc min to Uc max. Only four coils cover control voltages between 24 to 500V 50/60Hz or 20 to 500V DC. NF contactor relays can manage large control voltage variations. One coil can be used for different control voltages used worldwide without any coil change. NF contactor relays have built-in surge protection and do not require additional surge suppressors. 4 Pole contactor relays (mechanically-linked auxiliary contacts compliant with Annex L of IEC 60947-5-1 and including the “Mechanically Linked” symbol on the contactor relay side). AC or DC operated control circuit.