Functional Devices TIB40A 40VA 120 to 24VAC DIN Rail Mount Control Transformer

The Functional Devices TIB40A is a housed, DIN rail-mountable control transformer rated at 40 VA with a 120 VAC primary input and 24 VAC secondary output. Designed for HVAC control panels and building automation systems, the TIB40A snaps directly onto standard 35mm DIN rail, eliminating the foot-mount hardware and exposed wiring associated with traditional open-frame transformers.

Part of Functional Devices' TIB series of enclosed power supplies, this transformer delivers a stable 24 VAC output to power thermostats, relays, dampers, actuators, and other low-voltage control circuits. The enclosed housing protects internal components from dust and physical damage while providing a clean, professional panel appearance.

Key Features:

• 40 VA output rating — suitable for powering multiple 24 VAC control devices
• 120 VAC primary / 24 VAC secondary voltage configuration
• 35mm DIN rail mount — snaps into place without additional mounting hardware
• Enclosed housing — protects components and simplifies panel layout
• UL Listed — meets Class 2 power supply requirements per NEC Article 725
• 50/60 Hz compatible — suitable for standard North American electrical systems
• Ideal for BAS controllers, RIB relay panels, VAV actuators, and HVAC control assemblies

Functional Devices has been manufacturing quality electronic devices for the building automation industry since 1969, with a field failure rate of less than 1 in 16,000 units. The TIB40A is backed by the company's standard product warranty and is engineered for reliable, long-term performance in commercial and industrial control panel applications.