TE Connectivity T9AS5D22-24 Relay

The TE Connectivity T9AS5D22-24 is a heavy-duty SPDT (1 Form C) power relay engineered for reliable switching in HVACR control circuits and industrial automation. Operating on a 24VDC coil, this T9A series relay features silver cadmium oxide contacts rated for 20A at 240VAC, providing high inrush current handling for motors and inductive loads. The housing is a wash-tight plastic case with a knock-off nib, allowing for post-solder cleaning while providing the option for venting to ensure long-term contact reliability. Designed for versatile installation, it utilizes PCB mount pins for board stability along with quick-connect terminals for high-current load wiring. As a standard general purpose relay in the industry, it is a preferred solution for replacing failed components in furnace blowers, heat pumps, and fan motor controls where a PCB power relay with high dielectric strength is required to prevent voltage creepage.

• Dual Mounting Flexibility: Combines through-hole PCB mounting with 4.87mm quick-connect terminals for secure power connections.
• Enhanced Environmental Protection: The wash-tight construction protects internal components during flux removal, with a ventable nib for thermal degassing.
• High Load Capacity: Rated for 20 Amps, making it suitable for rigorous HVAC relay replacements and heavy-duty switching.
• Compact Footprint: Efficient T9A series design allows for high-density board layouts without sacrificing SPDT power relay performance.

What is the purpose of the knock-off nib on this relay?
The nib allows the relay to remain sealed during the soldering and cleaning process. Once installed, technicians can break the nib to vent the relay, which prevents the buildup of internal gases and extends contact life.

Can the T9AS5D22-24 be used in place of an SPST-NO relay?
Yes, because this is an SPDT relay, it features both Normally Open (NO) and Normally Closed (NC) contacts. You can utilize the common and NO terminals for SPST applications.

What are the coil requirements for this specific model?
This model requires a regulated 24VDC coil signal. Ensure your control board provides DC voltage, as an AC signal will cause the contacts to chatter and fail.

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.