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FUNCTIONAL DEVICES INC / RIB TR40VA004 Open Class 2 Transformer - Open Class 2 Transformers
FUNCTIONAL DEVICES INC / RIBOpen Class 2 Transformers

FUNCTIONAL DEVICES INC / RIB TR40VA004 Open Class 2 Transformer

The FUNCTIONAL DEVICES INC / RIB Class 2 Transformer (SKU TR40VA004, MPN TR40VA004) is an open Class 2 transformer with a 40 VA power rating. It features a foot mounting style, a 277V AC input voltage, and a 24V AC…

SKU 3G-OTH-47092

Brand
FUNCTIONAL DEVICES INC / RIB
Item
TR40VA004 Open Class 2 Transformer
Part Number
TR40VA004
Category
Open Class 2 Transformers
Available to Order
Also known as:TR40VA004FUNCTIONAL DEVICES INC / RIB
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Technical Specifications

FUNCTIONAL DEVICES INC / RIB
Manufacturer Part Number
TR40VA004
Type
Inherently Limited
AC
24V
Mounting
Foot
Input Voltage
277V 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 (SKU TR40VA004, MPN TR40VA004) is an open Class 2 transformer with a 40 VA power rating. It features a foot mounting style, a 277V AC input voltage, and a 24V AC output voltage, with wire lead connections for both primary and secondary sides.

Frequently Asked Questions

What is the FUNCTIONAL DEVICES INC / RIB TR40VA004 transformer used for?

This open Class 2 transformer supplies 24V AC power to control circuits, relays, and automation devices in commercial HVAC, lighting, and industrial control panels. Its 40 VA rating and foot-mount design suit permanent installations where a low-voltage power source is needed from a 277V AC line.

What are the specifications of the FUNCTIONAL DEVICES INC / RIB TR40VA004 transformer?

The TR40VA004 is a 40 VA open Class 2 transformer with a 277V AC input and 24V AC output. It has wire lead connections on both primary and secondary sides and a foot-mounting style. The manufacturer part number is TR40VA004, and it is inherently limited per Class 2 requirements.

Where to buy the FUNCTIONAL DEVICES INC / RIB TR40VA004 transformer worldwide?

3G Electric supplies the FUNCTIONAL DEVICES INC / RIB TR40VA004 transformer to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and a quote tailored to your location and project needs.

How to install the FUNCTIONAL DEVICES INC / RIB TR40VA004 transformer?

Mount the transformer securely using its foot bracket on a flat surface. Connect the 277V AC primary wires to the line supply and the 24V AC secondary wires to the load. Ensure all connections are tight and follow local electrical codes. The unit is inherently limited, so no external fuse is required on the secondary.

Used in

Common applications for FUNCTIONAL DEVICES INC / RIB
HVAC control panels — Functional Devices RIB Class 2 transformers (e.g., PSH75AB10) provide 24V AC power for thermostats, relays, and zone valves.
Lighting contactor panels — RIB power supplies (e.g., PSMN200A) step down 347V AC to 24V AC for lighting control relays and occupancy sensors.
Pump control panels — Enclosed Class 2 transformers (e.g., PSH200A) supply 24V AC to pump start relays and float switches in water/wastewater facilities.
Industrial automation — RIB current sensors and relays monitor and switch low-voltage control circuits in PLC-based systems.
Commercial building automation — Functional Devices power supplies (e.g., PSH100AB10-EXT2) provide isolated 24V AC power for building controllers and actuators.
Data center cooling — RIB transformers (e.g., PSH300A) power control circuits for CRAC units and economizer dampers.
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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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