The Functional Devices RIB2401B is a true workhorse for HVACR technicians, designed as a robust 20 Amp SPDT enclosed power relay for building automation and lighting control systems. This pilot-controlled device features a dual-coil arrangement capable of accepting 24VAC or 24DC input, providing maximum flexibility when interfacing with digital controllers or low-voltage thermostats. The 120V secondary side is rated for high-inductive loads, making it an ideal solution for switching fan motors, pumps, and 120V lighting circuits. Built with a NEMA 1 enclosure and an internal LED status indicator, this relay simplifies troubleshooting by offering immediate visual confirmation of coil activation. Its pre-wired pigtails and 1/2" NPT nipple allow for rapid mounting to standard electrical boxes, ensuring clean, code-compliant installations. When you need a reliable dry contact relay to isolate sensitive control boards from 120V line voltage, the RIB2401B remains the industry standard for durability and performance. Key Benefits for the Contractor High Amperage Rating: Rated for 20A resistive and 1HP at 120VAC, providing sufficient overhead for demanding motor loads. Universal Coil Input: Eliminates the need for multiple SKUs by supporting both 24VAC and 24VDC control signals. Simplified Installation: Pre-wired leads and a threaded nipple design reduce labor time during field retrofits. Visual Diagnostics: The integrated LED glows when the coil is energized, allowing for quick circuit verification without a multimeter. Common Technical Questions Can the RIB2401B be used to switch 277V loads? No, this specific model is designed for 120VAC application on the contact side. For 277V lighting or motor applications, you should look at the RIB2402B series. What is the maximum current draw of the 24V coil? The coil draws approximately 83mA at 24VAC and 40mA at 24VDC, making it compatible with most standard 40VA or 75VA control transformers. Is this relay suitable for outdoor placement? This is an enclosed relay rated for NEMA 1 environments. It should be mounted indoors or within a secondary weather-proof enclosure if used for outdoor equipment. 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.
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