Functional Devices TR40VA015 Transformer while the 306800 (FS7-28S) uses

while the 306800 (FS7-28S) uses stainless steel paddles for corrosive environments or specialized "S" model switches

including the CG

Cool White Light: 4100K color profile offers high visibility for product displays and internal cabinet lighting

This HVAC limit switch is recognized for its high-speed contact separation and long-term reliability in demanding residential and commercial heating systems

Functional Devices TR40VA015 Transformer while the 306800 (FS7-28S) usesThe Functional Devices TR40VA015 is a professional grade 40VA control transformer designed for heavy duty HVACR and commercial building automation tasks. This multi tap transformer features a flexible primary side, allowing for 120 208 240 VAC input to meet various site requirements with a single SKU. On the secondary side, it delivers a stable 24 VAC output, making it the standard choice for powering 24V thermostats, RIB relays, and advanced HVAC