Functional Devices RIBT243B Relay

The Functional Devices RIBT243B is a heavy-duty, pre-packaged enclosed relay designed for demanding HVAC control circuits and building automation systems. This 20 Amp pilot relay features a unique 2SPST + 1SPDT contact configuration, providing versatile switching capabilities for multiple loads from a single 24VAC/DC coil input. The NEMA 1 rated enclosure includes a 1/2" nipple for direct mounting to electrical boxes, ensuring common mode noise rejection and streamlined installation. Engineers and technicians frequently specify the RIBT243B relay for dry contact switching and motor control due to its high inductive load rating and LED status indicator which simplifies field troubleshooting. By consolidating multiple poles into one track-mounted relay equivalent package, this unit reduces cabinet clutter and wiring complexity in industrial relay application environments.

• High Load Capacity: Rated for up to 20 Amps, making it suitable for direct control of fans, pumps, and resistive heating elements.
• Multi-Pole Versatility: The combination of 2SPST and 1SPDT contacts allows for simultaneous control of independent voltage control circuits.
• Industrial Durability: Housed in a rugged UL-listed enclosure that protects internal components from dust and physical damage.
• Visible Diagnostics: Integral LED provides immediate visual confirmation of coil power, reducing diagnostic time during service calls.
• Simplified Mounting: External 1/2" NPT hub allows for fast attachment to junction boxes or control panels without additional hardware.

Can the RIBT243B be used for both AC and DC switching?
Yes, the internal relay contacts are designed to handle both AC and DC loads, provided they stay within the 20 Amp maximum rating for the specific voltage applied.

Is this relay suitable for outdoor installations?
The Functional Devices RIBT243B is housed in a NEMA 1 enclosure intended for indoor use. For outdoor applications, it must be mounted inside a weather-tight NEMA 3R or 4X rated electrical cabinet.

What is the power draw of the 24V coil?
The coil is high-efficiency, typically drawing around 75mA to 100mA, making it compatible with standard 24V HVAC transformers and DDC controllers.

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.