3M Scotchlok Insulation Displacement Connector 558 is suitable for control circuit wiring, fixture wiring, appliance wiring, signal and PA systems and automotive/boat/RV wiring. It is 600V rated for building wire and 1000V rated for signs, fixtures and luminaires. The connector withstands temperatures of 221 degrees F (105 degrees C). UL Listed, CSA Certified and RoHS 2011/65/EU Compliant.