While the Parker AFSB05 fits many Gold Ring Series valves

the 80K28 is technically identical to 80K2801 and serves as the direct OEM replacement pressure switch for several Lennox-family brands

Verification of the unit's nameplate voltage is critical before installation to prevent electrical damage

This is the adapter plate only

Copeland 971-C100-71 Protector Kit 326070-701 While the Parker AFSB05 fitsThe Copeland 971 C100 71 External Protector Kit is a field proven overload protection device engineered to safeguard HVAC compressor motors from catastrophic failure. This genuine OEM assembly functions as a physical and electrical barrier, shielding critical internal windings from excessive current draw and environmental contaminants like dust and moisture. Designed for high performance commercial refrigeration and air conditioning systems, it