Functional Devices PSH100A Power Supply

The Functional Devices PSH100A is a robust 100VA enclosed power supply engineered for demanding building automation and HVAC control applications. Designed to step down 120 VAC to 24 VAC, this Class 2 transformer provides consistent power for controllers, actuators, and sensors requiring precise voltage stability. Housed in a NEMA 1 rated metal enclosure, the PSH100A features a built-in circuit breaker that eliminates the need for external fuse replacement, streamlining field maintenance. The pre-wired power supply includes a convenient on/off switch with an integrated 10 Amp circuit breaker for the 120V input, ensuring protection for both the device and the secondary 24V circuit. Contractor-friendly features such as standardized knockouts and wire leads make it an ideal choice for 120-24V power conversion in high-density control panels where reliability and heat dissipation are critical for long-term system performance.

• Pre-wired design reduces installation time and minimizes wiring errors in complex BAS panels.
• Integrated on/off switch allows for safe local isolation during troubleshooting or component replacement.
• Resettable circuit breaker protection prevents downtime associated with blown fuses during overcurrent events.
• Durable NEMA 1 enclosure protects internal components from mechanical damage and dust in mechanical rooms.
• Compact footprint allows for easy mounting within standard electrical boxes or dedicated control enclosures.

Is the PSH100A rated for Class 2 applications?
Yes, this unit provides a 100VA Class 2 output, meeting necessary safety standards for low-voltage control circuits.

Can I use this power supply to drive multiple 24V actuators?
The PSH100A provides up to 100VA; total load should be calculated based on the sum of all connected component VA ratings to ensure it does not exceed capacity.

Does this unit include a status indicator?
The integrated switch provides visual confirmation of the primary power status, assisting in rapid diagnostic checks.

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.