Broad Application: Suitable for all McDonnell & Miller FS4-3 models (excluding D and T variants) and high-capacity FS250 series switches

Is this coupling suitable for R-410A refrigeration lines

Always verify the part number on the existing housing to ensure electrical match-up

While often found in legacy Barber Colman installations

It features the same electrical specifications and pressure rating

MARS 19551 Relay Els PW 17895 Broad Application: Suitable for allThe MARS 19551 is a high performance potential relay designed for precise motor starting control in HVACR applications, specifically engineered for single phase capacitor start motors. This component serves as a direct professional grade replacement for the 3ARR3MARS551, ensuring seamless integration into existing submersible pump controls and compressor systems. Operating with a continuous voltage rating of 244 270V, the 19551 utilizes