The Robertshaw 41-409 Hot Surface Ignitor is a high-performance silicon carbide ignitor engineered for demanding HVACR applications

system performance may be affected

Housed in a NEMA 1 rated enclosure

threaded interface for 1/4 inch HVAC fittings

Utilizing the exact S1-7624A3591 OEM part maintains system UL/CSA certifications and ensures a drop-in fit with standard spade terminal connections for fast field installation

Schneider Electric (Barber Colman) R820-PCB-A01 Input Board Els PW 17895 The Robertshaw 41-409 Hot SurfaceThe Schneider Electric R820 PCB A01 is a critical replacement 24Vac electronic PCB input board engineered for both single phase and three phase HVACR systems. Designed to maintain precise control logic within older Barber Colman architectures, this HVAC control board facilitates seamless communication between input sensors and heavy duty contactors. It serves as the verified R820 PCB A01 direct replacement for legacy part numbers 021 0474 and KEL021