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FUNCTIONAL DEVICES INC / RIB

Functional Devices Inc. / RIB (Relay In a Box) is a manufacturer of electrical control components, primarily known for its enclosed relays, transformers, and power supplies designed for building automation, HVAC, and industrial control applications. The company, based in the United States, produces a range of products that emphasize reliability and ease of installation, with a focus on Class 2 transformers and switching devices. 3G Electric supplies a selection of Functional Devices Inc. / RIB products, including open and enclosed Class 2 transformers, power supplies, and prewired rocker switches. These components are used to step down line voltage (e.g., 120V AC or 480V AC) to low-voltage 24V AC for control circuits, often in burner management, pump control, and gas valve actuation systems. The transformers are available in power ratings from 50 VA to 500 VA, with options for foot or wall mounting, and feature circuit breaker protection for overcurrent safety. Enclosed models include screw terminals or wire leads for connection, and some units incorporate individual output on/off switches for localized control. The prewired rocker switches, such as the SIB02S and SIB04S, are designed for relay override applications, offering SPST switching with 16-inch wire leads for straightforward integration into control panels. Functional Devices Inc. / RIB products are built to meet standard industrial electrical specifications, with enclosures suitable for indoor use and compliance with Class 2 circuit requirements per UL and NEC standards. 3G Electric stocks these items for global shipment, providing engineers and procurement specialists with access to components that support reliable low-voltage control in industrial environments. The product line is particularly relevant for applications requiring consistent 24V AC power for controllers, actuators, and relays, where transformer sizing and protection are critical to system performance.

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About FUNCTIONAL DEVICES INC / RIB

Functional Devices Inc. / RIB (Relay In a Box) is a manufacturer of electrical control components, primarily known for its enclosed relays, transformers, and power supplies designed for building automation, HVAC, and industrial control applications. The company, based in the United States, produces a range of products that emphasize reliability and ease of installation, with a focus on Class 2 transformers and switching devices. 3G Electric supplies a selection of Functional Devices Inc. / RIB products, including open and enclosed Class 2 transformers, power supplies, and prewired rocker switches. These components are used to step down line voltage (e.g., 120V AC or 480V AC) to low-voltage 24V AC for control circuits, often in burner management, pump control, and gas valve actuation systems. The transformers are available in power ratings from 50 VA to 500 VA, with options for foot or wall mounting, and feature circuit breaker protection for overcurrent safety. Enclosed models include screw terminals or wire leads for connection, and some units incorporate individual output on/off switches for localized control. The prewired rocker switches, such as the SIB02S and SIB04S, are designed for relay override applications, offering SPST switching with 16-inch wire leads for straightforward integration into control panels. Functional Devices Inc. / RIB products are built to meet standard industrial electrical specifications, with enclosures suitable for indoor use and compliance with Class 2 circuit requirements per UL and NEC standards. 3G Electric stocks these items for global shipment, providing engineers and procurement specialists with access to components that support reliable low-voltage control in industrial environments. The product line is particularly relevant for applications requiring consistent 24V AC power for controllers, actuators, and relays, where transformer sizing and protection are critical to system performance.

Common Applications

  • 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.

Frequently asked questions

Common questions about FUNCTIONAL DEVICES INC / RIB from 3G Electric.

What types of transformers does Functional Devices Inc. / RIB offer through 3G Electric?

Functional Devices Inc. / RIB transformers available from 3G Electric include open Class 2 transformers (e.g., TR50VA022US) and enclosed panel-mounted power supplies (e.g., PSH75A75AB10, PSH200A, PSH300A, PSH500A). Open models are foot-mounted with wire leads, while enclosed units are wall-mounted with screw terminals or wire leads. Power ratings range from 50 VA to 500 VA, with input voltages of 120V AC or 480V AC and a standard 24V AC output. Enclosed models include circuit breakers and some have individual output on/off switches.

Are Functional Devices Inc. / RIB transformers suitable for outdoor use?

The Functional Devices Inc. / RIB transformers supplied by 3G Electric are designed for indoor use. Open-style transformers (e.g., TR50VA022US) are intended for installation within equipment enclosures or control panels. Enclosed models (e.g., PSH series) have metal enclosures rated for indoor environments but are not specified for outdoor exposure. For outdoor applications, additional weatherproofing or a separate NEMA-rated enclosure would be required.

What is the purpose of the circuit breaker on Functional Devices Inc. / RIB transformers?

The circuit breaker on Functional Devices Inc. / RIB transformers, such as the TR50VA022US and PSH series, provides overcurrent protection for the secondary (24V AC) circuit. It automatically disconnects the output if a fault or overload occurs, preventing damage to the transformer and downstream equipment. This feature is particularly useful in industrial control systems where short circuits or excessive loads can occur, reducing downtime and maintenance needs.

Can Functional Devices Inc. / RIB prewired rocker switches be used with any relay?

Functional Devices Inc. / RIB prewired rocker switches, like the SIB02S and SIB04S, are designed for use with RIB relays or similar control devices. They feature an override switch on the load side of the relay, allowing manual control of the relay output. The switches come with 16-inch wire leads for easy connection, but compatibility depends on the relay's voltage and current ratings. They are typically used in HVAC or lighting control panels where manual override is needed.

What is the difference between the TR50VA022US and PSH series transformers?

The TR50VA022US is an open-style Class 2 transformer with a 50 VA rating, foot mounting, and wire leads for primary and secondary connections. It is designed for installation inside a control panel. The PSH series (e.g., PSH200A, PSH300A, PSH500A) are enclosed power supplies with higher VA ratings (75 VA to 500 VA), wall mounting, screw terminals or wire leads, and include a circuit breaker and on/off switch. The PSH models provide additional protection and convenience for standalone installations.

Are Functional Devices Inc. / RIB products compliant with international standards?

Functional Devices Inc. / RIB products, such as those sold by 3G Electric, are designed to meet North American standards, including UL listing for Class 2 transformers and compliance with NEC requirements. They are suitable for use in industrial control systems globally, but buyers should verify local electrical codes and voltage compatibility (e.g., 120V AC or 480V AC input). The products are not CE-marked by default, so additional certification may be needed for European markets.