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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-style transformer with a 20 VA power rating, featuring a foot mounting configuration. It accepts a 240V AC input and provides a 24V AC output, with wire…

SKU 3G-OTH-47817

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
TR20VA004
Type
Inherently Limited
AC
24V
Mounting
Foot
Input Voltage
240V AC
Output Voltage
24V AC
Connection - Primary
Wire Lead
Connection - Secondary
Wire Lead
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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-style transformer with a 20 VA power rating, featuring a foot mounting configuration. It accepts a 240V AC input and provides a 24V AC output, with wire lead connections on both the primary and secondary sides. This inherently limited device is identified by manufacturer part number TR20VA004.

Frequently Asked Questions

What is the FUNCTIONAL DEVICES INC / RIB TR20VA004 transformer used for?

This open-style Class 2 transformer supplies 24V AC power to control circuits, relays, and automation devices in HVAC, lighting, and industrial systems. Its inherently limited design meets safety standards for low-voltage applications.

What are the specifications of the FUNCTIONAL DEVICES INC / RIB TR20VA004 transformer?

The TR20VA004 is a 20 VA, open Class 2 transformer with a 240V AC input and 24V AC output. It features foot mounting and wire lead connections on both primary and secondary sides. The brand is FUNCTIONAL DEVICES INC / RIB.

Where to buy the FUNCTIONAL DEVICES INC / RIB TR20VA004 transformer worldwide?

3G Electric supplies the FUNCTIONAL DEVICES INC / RIB TR20VA004 transformer worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the FUNCTIONAL DEVICES INC / RIB TR20VA004 transformer?

Mount the transformer securely using its foot bracket. Connect the 240V AC primary wires to the supply and the 24V AC secondary wires to the load. Ensure the circuit is de-energized during installation and follow local electrical codes.

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, Inherently Limited (MPN TR40VA004). 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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FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 50 VA Power Rating, 120V AC, 24V AC, Primary Fuse (MPN TR50VA002). Key specifications — Brand: FUNCTIONAL DEVICES INC / RIB; Connection - Primary: Wire Lead; Connection - Secondary: Wire Lead; Input Voltage: 120V AC; Mounting: Dual Hub; Output Voltage: 24V AC.
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FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 96 VA Power Rating, 24V AC, Circuit Breaker (MPN TR100VA009). Key specifications — Brand: FUNCTIONAL DEVICES INC / RIB; Connection - Primary: Wire Lead; Connection - Secondary: Wire Lead; Input Voltage: 208V AC; Mounting: Foot; Output Voltage: 24V AC.
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FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 75 VA Power Rating, 120V AC, 24V AC, Foot/Hub (MPN TR75VA001). Key specifications — Brand: FUNCTIONAL DEVICES INC / RIB; Connection - Primary: Wire Lead; Connection - Secondary: Wire Lead; Input Voltage: 120V AC; Mounting: Foot; Output Voltage: 24V AC.
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FUNCTIONAL DEVICES INC / RIB Class 2 Transformer: 40 VA Power Rating, 120V AC, 24V AC, Foot/Hub (MPN TR40VA001). Key specifications — Brand: FUNCTIONAL DEVICES INC / RIB; Connection - Primary: Wire Lead; Connection - Secondary: Wire Lead; Input Voltage: 120V AC; Mounting: Foot; Output Voltage: 24V AC.
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