Functional Devices TR20VA004 Transformer
The Functional Devices TR20VA004 is a versatile 20VA control transformer designed for reliable power conversion in building automation and HVAC systems. Built with split-bobbin construction, this unit effectively steps down high-line voltage to a consistent 24Vac secondary voltage for powering thermostats, relays, and sensors. The multi-tap primary accommodates 120/208/240/277Vac, providing technicians with a single-part solution for diverse project sites. With inherently limited over-current protection and a Class 2 UL listing, it eliminates the need for external fusing in most standard control circuits. Its physical hardware includes a rugged foot and dual threaded hub mount configuration, allowing for secure attachment to electrical boxes or panels. This 1.42 lb unit is rated for an MTBF of 100,000 hours, ensuring long-term stability in commercial and industrial environments.
Key Benefits- Multi-Tap Primary: Supports four different input voltages (120, 208, 240, 277Vac), reducing the number of individual SKUs needed on the service truck.
- Flexible Mounting: Features both a foot mount for panel surfaces and dual threaded hubs for 0.5-inch NPT knockouts.
- Class 2 Safety: Meets UL5085-3 safety standards with inherent current limitation to protect downstream low-voltage components.
- Quick Installation: Includes 8-inch color-coded pigtail wires with 0.5-inch stripping for faster termination in the field.
- Durable Design: Operates in extreme temperatures from -30 to 140°F, suitable for rooftop units and mechanical rooms.
Is the TR20VA004 compatible with 480V systems?
No, this specific model supports a maximum primary voltage of 277Vac. For 480V applications, a transformer with a dedicated 480V tap, such as the TR50VA004, is required.
Can I use this transformer to power multiple 24V actuators?
This transformer is rated for 20VA. You must calculate the total volt-ampere draw of your actuators and controllers to ensure the combined load does not exceed this capacity.
What does 'inherently limited' mean for this part?
It means the TR20VA004 is designed so the impedance of its windings limits the output current. If a short circuit occurs, the transformer is protected without requiring an external circuit breaker or fuse.
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.
Functional Devices TR20VA004 Transformer
The Functional Devices TR20VA004 is a versatile 20VA control transformer designed for reliable power conversion in building automation and HVAC systems. Built with split-bobbin construction, this unit effectively steps down high-line voltage to a consistent 24Vac secondary voltage for powering thermostats, relays, and sensors. The multi-tap primary accommodates 120/208/240/277Vac, providing technicians with a single-part solution for diverse project sites. With inherently limited over-current protection and a Class 2 UL listing, it eliminates the need for external fusing in most standard control circuits. Its physical hardware includes a rugged foot and dual threaded hub mount configuration, allowing for secure attachment to electrical boxes or panels. This 1.42 lb unit is rated for an MTBF of 100,000 hours, ensuring long-term stability in commercial and industrial environments.
Key Benefits- Multi-Tap Primary: Supports four different input voltages (120, 208, 240, 277Vac), reducing the number of individual SKUs needed on the service truck.
- Flexible Mounting: Features both a foot mount for panel surfaces and dual threaded hubs for 0.5-inch NPT knockouts.
- Class 2 Safety: Meets UL5085-3 safety standards with inherent current limitation to protect downstream low-voltage components.
- Quick Installation: Includes 8-inch color-coded pigtail wires with 0.5-inch stripping for faster termination in the field.
- Durable Design: Operates in extreme temperatures from -30 to 140°F, suitable for rooftop units and mechanical rooms.
Is the TR20VA004 compatible with 480V systems?
No, this specific model supports a maximum primary voltage of 277Vac. For 480V applications, a transformer with a dedicated 480V tap, such as the TR50VA004, is required.
Can I use this transformer to power multiple 24V actuators?
This transformer is rated for 20VA. You must calculate the total volt-ampere draw of your actuators and controllers to ensure the combined load does not exceed this capacity.
What does 'inherently limited' mean for this part?
It means the TR20VA004 is designed so the impedance of its windings limits the output current. If a short circuit occurs, the transformer is protected without requiring an external circuit breaker or fuse.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Functional Devices TR20VA004 is a versatile 20VA control transformer designed for reliable power conversion in building automation and HVAC systems. Built with split-bobbin construction, this unit effectively steps down high-line voltage to a consistent 24Vac secondary voltage for powering thermostats, relays, and sensors. The multi-tap primary accommodates 120/208/240/277Vac, providing technicians with a single-part solution for diverse project sites. With inherently limited over-current protection and a Class 2 UL listing, it eliminates the need for external fusing in most standard control circuits. Its physical hardware includes a rugged foot and dual threaded hub mount configuration, allowing for secure attachment to electrical boxes or panels. This 1.42 lb unit is rated for an MTBF of 100,000 hours, ensuring long-term stability in commercial and industrial environments.
Key Benefits- Multi-Tap Primary: Supports four different input voltages (120, 208, 240, 277Vac), reducing the number of individual SKUs needed on the service truck.
- Flexible Mounting: Features both a foot mount for panel surfaces and dual threaded hubs for 0.5-inch NPT knockouts.
- Class 2 Safety: Meets UL5085-3 safety standards with inherent current limitation to protect downstream low-voltage components.
- Quick Installation: Includes 8-inch color-coded pigtail wires with 0.5-inch stripping for faster termination in the field.
- Durable Design: Operates in extreme temperatures from -30 to 140°F, suitable for rooftop units and mechanical rooms.
Is the TR20VA004 compatible with 480V systems?
No, this specific model supports a maximum primary voltage of 277Vac. For 480V applications, a transformer with a dedicated 480V tap, such as the TR50VA004, is required.
Can I use this transformer to power multiple 24V actuators?
This transformer is rated for 20VA. You must calculate the total volt-ampere draw of your actuators and controllers to ensure the combined load does not exceed this capacity.
What does 'inherently limited' mean for this part?
It means the TR20VA004 is designed so the impedance of its windings limits the output current. If a short circuit occurs, the transformer is protected without requiring an external circuit breaker or fuse.
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.
