Functional Devices TR100VA001-28 100VA 120V to 24V Control Transformer with 28-Inch Leads

The Functional Devices TR100VA001-28 is a 96VA, Class 2 step-down control transformer designed for building automation and HVAC temperature control systems. It steps down a 120 VAC primary supply to a stable 24 VAC secondary output, making it well-suited for powering thermostats, zone valves, damper actuators, and direct digital controllers (DDCs). The -28 suffix designates a 28-inch pre-stripped lead cable set, providing additional wiring reach compared to the standard 8-inch wire version.

Key Features:

• 100VA Rated / 96VA Output — Handles the inrush demands of multiple 24V control loads simultaneously
• 120 VAC Primary to 24 VAC Secondary — Standard step-down voltage for HVAC and building automation control circuits
• Integrated Circuit Breaker — Resettable overcurrent protection safeguards windings and downstream controls; no fuse replacement required
• Dual Mounting Options — Foot mount and single 1/2-inch NPT threaded hub mount allow installation in enclosures, junction boxes, or panels
• 28-Inch Pre-Stripped Lead Cable — Extended leads provide added flexibility for tight or remote wiring installations
• Split-Bobbin Construction — Provides primary-to-secondary isolation for improved safety and noise rejection
• 50/60 Hz Compatible — Suitable for use in both North American and international 60 Hz and 50 Hz applications
• Operating Temperature: -30°F to 140°F (-34°C to 60°C)
• MTBF: 100,000 hours at 77°F (25°C)

Certifications & Approvals:

• Class 2 UL5085-3 Listed
• C-UL Listed (Canada)
• CE Marked
• RoHS Compliant

Part of the Functional Devices RIB TR Series, this transformer is a reliable choice for commercial HVAC, building management systems (BMS), and temperature control panel builds where a high-capacity 24V power source and overcurrent protection are required.