Functional Devices PSH300A Enclosed Power Supply 120/240/277/480V to 24VAC 3-100VA UL Class 2

The Functional Devices PSH300A is a versatile enclosed power supply designed to convert multiple input voltages to a reliable 24VAC output for HVAC and building automation applications. This UL Class 2 rated transformer provides safe, code-compliant power for thermostats, control systems, zone dampers, and other low-voltage devices.

Key Features:

• Multi-voltage input: accepts 120VAC, 240VAC, 277VAC, or 480VAC for flexible installation
• 24VAC output with adjustable VA rating from 3VA to 100VA
• UL Class 2 rated for inherent overcurrent and overload protection
• Enclosed metal housing protects internal components and provides safe mounting
• Auto-resetting circuit breaker prevents damage from overload conditions
• Suitable for commercial and industrial HVAC control applications

The enclosed design makes this transformer ideal for both indoor and protected outdoor installations where a robust, reliable 24VAC power source is required. The multi-tap primary allows a single unit to serve multiple voltage applications, reducing inventory requirements.