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FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 20 VA Power Rating, 24V AC - Open Class 2 Transformers
FUNCTIONAL DEVICES INC / RIBOpen Class 2 Transformers

FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 20 VA Power Rating, 24V AC

The FUNCTIONAL DEVICES INC / RIB Class 2 Transformer is an open Class 2 transformer with a 20 VA power rating. It features a 24V AC input and 24V AC output, with wire lead connections for both primary and secondary…

SKU 3G-OTH-49278

Brand
FUNCTIONAL DEVICES INC / RIB
Item
Class 2 Transformer: 20 VA Power Rating, 24V AC
Category
Open Class 2 Transformers
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Technical Specifications

FUNCTIONAL DEVICES INC / RIB
Manufacturer Part Number
TR20VA003
Type
Foot/Hub
AC
24V
Mounting
Hub
Input Voltage
24V AC
Output Voltage
24V AC
Connection - Primary
Wire Lead
Connection - Secondary
Wire Lead
View Full Spec Sheet

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FUNCTIONAL DEVICES INC / RIB Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The FUNCTIONAL DEVICES INC / RIB Class 2 Transformer is an open Class 2 transformer with a 20 VA power rating. It features a 24V AC input and 24V AC output, with wire lead connections for both primary and secondary sides. This unit is designed for hub mounting and is identified by manufacturer part number TR20VA003.

Frequently Asked Questions

What is the FUNCTIONAL DEVICES INC / RIB TR20VA003 transformer used for?

This open Class 2 transformer supplies 24V AC power to control circuits in HVAC, lighting, and building automation systems. Its 20 VA rating and hub mounting suit it for panel or junction-box installations where reliable low-voltage power is needed.

What are the specifications of the FUNCTIONAL DEVICES INC / RIB TR20VA003?

The TR20VA003 is a 20 VA open Class 2 transformer with 24V AC input and 24V AC output. Both primary and secondary connections are wire leads. It is designed for hub mounting and carries manufacturer part number TR20VA003 from FUNCTIONAL DEVICES INC / RIB.

Where to buy the FUNCTIONAL DEVICES INC / RIB TR20VA003 worldwide?

3G Electric supplies the FUNCTIONAL DEVICES INC / RIB TR20VA003 transformer worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this open Class 2 transformer globally.

How to install the FUNCTIONAL DEVICES INC / RIB TR20VA003 transformer?

Mount the transformer using the hub fitting into a standard knockout. Connect primary and secondary wire leads per local electrical codes, ensuring the 24V AC input matches your supply. Keep the unit in a dry, ventilated location. Always de-energize before wiring.

Used in

Common applications for FUNCTIONAL DEVICES INC / RIB
HVAC control systems — Functional Devices Inc. / RIB PSH series transformers provide 24V AC power for thermostats and damper actuators.
Burner management — Functional Devices Inc. / RIB TR50VA022US transformer supplies low-voltage power for flame safeguard controllers.
Pump control panels — Functional Devices Inc. / RIB PSH500A-LVC power supply delivers 24V AC for relay logic in pump sequencing.
Lighting control — Functional Devices Inc. / RIB SIB04S rocker switch enables manual override of relay-controlled lighting circuits.
Industrial automation — Functional Devices Inc. / RIB PSH300A transformer powers 24V AC sensors and PLC input modules.
Gas valve actuation — Functional Devices Inc. / RIB enclosed transformers provide isolated 24V AC for solenoid valves in gas trains.

FUNCTIONAL DEVICES INC / RIB Products

3G Electric supplies FUNCTIONAL DEVICES INC / RIB open class 2 transformers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 40 VA Power Rating, 24V AC, 24V AC, Foot/Hub (MPN TR40VA003). Key specifications — Brand: FUNCTIONAL DEVICES INC / RIB; Connection - Primary: Wire Lead; Connection - Secondary: Wire Lead; Input Voltage: 24V AC; Mounting: Foot; Output Voltage: 24V AC.
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FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 50 VA Power Rating, 277V AC, 24V AC, Foot/Hub (MPN TR50VA014). Key specifications — Brand: FUNCTIONAL DEVICES INC / RIB; Connection - Primary: Wire Lead; Connection - Secondary: Wire Lead; Input Voltage: 277V AC; Mounting: Foot; Output Voltage: 24V AC.
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