it supports both surface and DIN rail mounting

There is no functional or technical difference between these two model numbers

The York S1-5882872 Contactor is a precision-engineered genuine York replacement part designed for high-duty cycle applications in residential and light commercial HVAC equipment

and an open air over enclosure

this specific model is designed for 277V or 480V primary inputs

Lochinvar & A.O. Smith 100110196 Pilot Burner 321142-301 it supports both surface andThe Lochinvar & A. O. Smith 100110196 Pilot Burner is a critical OEM replacement component designed for high performance natural gas water heaters and boilers. Engineered to meet the exacting standards of White Rodgers ignition systems, this natural pilot burner (E44576) ensures a stable and consistent ignition source for I. I. D. (Intermittent Ignition Device) model heaters. As a veteran technician, you know that maintaining precise millivolt output