Description
The Functional Devices RIBM2401SB is a compact 4-inch relay module designed for dependable switching control in HVAC, building automation, and light commercial applications. Featuring a 20-amp SPDT-capable SPST output and a built-in manual override, this relay simplifies installation and commissioning while providing the flexibility technicians need in the field.
Key Features
- 20-amp SPST relay output for high-capacity load switching
- Built-in manual override for easy testing and commissioning without a control signal
- Compact 4-inch form factor for versatile panel or enclosure mounting
- Designed for use in HVAC systems, building automation, and light commercial controls
- Reliable Functional Devices RIB® relay construction for long service life
- Suitable for fan, pump, compressor, and other motor load switching applications
Applications
- HVAC fan and pump control circuits
- Building automation system (BAS) output switching
- Light commercial equipment control
- Zone control and load management panels
Why Choose the RIBM2401SB?
Functional Devices is a trusted name in relay-in-a-box technology, and the RIBM2401SB upholds that reputation with a rugged design and straightforward wiring. The manual override feature is especially valuable during system startup and troubleshooting, allowing technicians to energize loads independently of the control signal. The 20-amp rating provides ample capacity for most HVAC switching tasks, making this relay a go-to solution for contractors and controls technicians alike.







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