Trane SFSWT3535 Contactor

When you need to expand your control logic on a job site, the Trane SFSWT3535 auxiliary switch is the standard for residential and light commercial HVAC applications. This OEM replacement part is specifically engineered to mount onto 20A to 60A contactors, providing a dual 2SPDT (Double Single-Pole Double-Throw) configuration. Technicians utilize this module to manage secondary circuits, such as interlocking crankcase heaters, status indicator lights, or safety circuit feedback, without requiring additional relays. Built for a 24V control circuit, it features 1/4-inch quick-connect terminals to ensure a fast, secure landing on the board. Its compact microswitch assembly design integrates seamlessly with Trane and American Standard equipment, maintaining system performance and reliability under high-cycle conditions.

• Universal Compatibility: Fits a broad range of Trane 20-60 Amp contactors, reducing the need to carry multiple auxiliary SKUs.
• Enhanced Logic Control: The 2SPDT contact configuration allows for simultaneous opening and closing of multiple auxiliary circuits.
• OEM Precision: Direct replacement part SFSWT3535 (replaces SWT03535) ensuring proper fitment and terminal alignment compared to generic alternatives.
• Industrial Durability: Rated for high-frequency switching to withstand the demands of HVAC control systems and minimize service callbacks.

• Will this auxiliary switch fit a 3-pole contactor? Yes, this 2SPDT aux switch is compatible with the side-mount slots of most Trane 20A through 60A contactors, regardless of the number of primary poles.
• What are the terminal specifications? The unit uses standard 1/4" male spade connectors, allowing for standard field wiring with common crimp terminals.
• Can this handle high-voltage auxiliary loads? While designed primarily for 24V HVAC control signals, always verify the specific amperage rating on the housing before using it for line-voltage pilot duty.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.