Many contractors and lighting specialists rely on general purpose relays when specifying or installing lighting control systems. Whether controlling a single circuit or managing multiple loads across a facility, having reliable relays in your toolkit is essential for smooth installations and long-term performance. That’s where Functional Devices, Inc. comes in — offering high-quality general purpose relays that have earned a reputation for dependability in the field.
The Right Relay for the Job
Functional Devices' general purpose relays are so good — the competition might as well be selling First Lieutenant purpose relays. With proven durability, versatile applications, and the trusted “Relay in a Box®” design, these relays are built to handle the demands of modern lighting control systems. When the job calls for reliable switching, why settle for anything less than a battle-tested General?
Whether you’re retrofitting an existing system or designing new construction, Functional Devices’ relays offer the perfect combination of flexibility, performance, and ease of installation — so you can keep your projects on schedule and your customers happy.
The Right Relay for a Bathroom Fan
You've got a light switch controlling 277V lights. You've got a 120V fan you would like to follow the light switch. Time to install a transformer...right? That would be a weird addition to an article about general purpose relays, so I'm going to go with... wrong! What you need is an LR2402B2G. It is a 20A relay with a 208-277V coil voltage. Connect the coil to the 277V light switch, wire up the contacts to the 120V fan, and you're done.
Options for Controlled Receptacles
Many of our customers have LED strips or other types of lights that turn on when plugged in. Functional Devices customers, being the intelligent and good-looking bunch they are, think, "How can I remotely control this electrical outlet?" Well, as luck would have it, we offer a general purpose relay that can generally meet this purpose. Take a look at the LR2401B2G.
The signal turning on and off the LR2401B2G could be from a variety of sources. A lighting ballast, light switch, or even a third thing. The LR2401B2G and LR2402B2G are perfect devices for when the lighting world just needs a thing to turn on another thing. They have two poles on them, which are completely isolated, so you could switch two loads at once. There are both normally open and normally closed contacts in case you want something to turn on with another thing turned off. The contacts are rated for 16A @ 277V Electronic Ballast, which means they can be used to turn on LED lights without worrying about inrush current. The coil voltage even has a 24V option if you're trying to turn on a high-voltage device with a low-voltage signal.
About Functional Devices, Inc.
Confidence and Peace of Mind in Every Box
At Functional Devices, Inc., we have been designing and manufacturing high-quality electronic components in the USA since 1969. Our mission is simple: to enhance lives in buildings and beyond by delivering reliable, innovative solutions for the building automation industry. Our product lineup includes RIB® relays, current sensors, power controls, power supplies, transformers, lighting controls, and more—each designed to meet the highest industry standards.
We test 100% of our assembled products, ensuring an exceptionally low failure rate—less than 1 in 16,000 in the field. This commitment to excellence means you get products that perform reliably, reducing downtime and increasing efficiency. With every Functional Devices product, you receive more than just a component—you gain confidence and peace of mind knowing your systems are built on trusted, field-proven technology.