Description
Functional Devices RIB2402SBC — 20A SPDT Relay, 24V Coil, 208–277V
The Functional Devices RIB2402SBC is a Relay in a Box (RIB®) designed to deliver dependable, compact switching performance in commercial and residential HVAC control applications. With a 20-amp SPDT (Single Pole Double Throw) contact configuration and a 24V AC/DC coil, this relay bridges low-voltage control signals to higher-voltage load circuits ranging from 208V to 277V — making it ideal for lighting, fan, and equipment control in building automation systems.
Key Features
- 20A SPDT (Single Pole Double Throw) contact configuration
- 24V AC/DC coil voltage for compatibility with standard HVAC control circuits
- Load voltage range: 208–277V AC
- Self-contained enclosure for easy mounting and protection
- Compact RIB® (Relay in a Box) design for versatile installation
- Suitable for use in building automation, HVAC, and lighting control systems
- DIN rail or surface mountable
Specifications
- Brand: Functional Devices
- Model / SKU: RIB2402SBC
- Contact Configuration: SPDT (1 Form C)
- Contact Rating: 20A
- Coil Voltage: 24V AC/DC
- Load Voltage: 208–277V AC
- Enclosure: Included (enclosed/box style)
Applications
- HVAC fan and equipment switching
- Commercial lighting control
- Building automation and energy management systems
- Low-voltage to line-voltage interface switching
The RIB2402SBC is part of Functional Devices’ trusted RIB® relay series, widely used by HVAC technicians and building automation professionals for its rugged construction, ease of installation, and reliable performance in demanding control environments.









