Type S melting alloy thermal overload relays provide motor overcurrent protection. The exclusive one piece melting alloy thermal unit is used in these relays provide protection against overheating of the motor winding insulation due excessive over current. This replaceable standard NC output contact of the overload relay comes as standard with all Type S melting alloy overload relays. Contact module has a NEMA B600 contact rating with a maximum voltage rating of 600VAC.