this blade terminal relay is specifically designed to seat into SH4B-05 or SH4B-05C base sockets

The 3-1/8" insert length is specific to the depth of the plenum

off-spec components

The York S1-024-35929-000 Pressure Switch is a critical safety component designed for precise HVAC airflow monitoring in high-efficiency systems

This heavy-duty component is built to withstand high operating temperatures

Copeland Comfort Control (White Rodgers) 24A34-6 Heat Sequencer this blade terminal relay isFor veteran technicians servicing electric furnaces and air handlers, the Copeland Comfort Control (White Rodgers) 24A34 6 Heat Sequencer is a reliable, industry standard solution for staging 24V heating elements. This 4 switch electric heat sequencer features a solid state 24V heater that provides precise timing for auxiliary contacts, ensuring that high amperage heating coils do not energize simultaneously. This controlled sequencing prevents