Finlandia / Harvia Part # FH73 or ZSK-778 Contactor ABB AF16-40-00-13, 240v coil is the heavy-duty switching component that enables safe, reliable power control in compatible sauna heater systems. Built around ABB’s proven AF16-40-00-13 contactor, it uses a 240-volt coil to engage and disengage heater load cleanly, allowing the control unit to operate at low voltage while the contactor handles the full current draw. This separation improves safety, reduces wear on the controls, and supports consistent heater performance. Engineered with high-quality materials to withstand warm, humid equipment spaces, the contactor resists arcing, overheating, and premature failure over years of regular cycling. As a genuine Finlandia / Harvia contactor, it is an essential replacement when repairing or upgrading your sauna’s electrical system, ensuring dependable operation session after session.