Functional Devices RIB2421B Enclosed Relay 20A SPDT with 24V AC/DC/120V AC/208-277V AC Coil
Image of 1
Key Features
- Reliable heavy-duty switching: 20A SPDT contacts provide dependable control for alarms, power supplies and auxiliary loads in security and building systems
- Wide coil voltage compatibility: accepts 24VAC/DC, 120VAC and 208–277VAC to reduce SKUs and simplify installations
- UL-listed for code compliance: UL916 (Energy Management) and UL864 (Fire) approvals for use in monitoring and fire/security applications
- Faster installation and service: enclosed, screw-mount design with color-coded leads minimizes wiring errors and saves panel space
- Low coil current and robust construction: efficient operation reduces drive requirements and delivers long-term reliability under continuous monitoring duty
Quick Specifications
- Product Model
- RIB2421B
- Brand Name
- Functional Devices
- Product Name
- RIB2421B Relay
- Product Type
- Relay
Explore the details
Product information
RIB2421B
Overview
Deliver dependable control and simplify installations for security, surveillance and building automation with the Functional Devices RIB2421B enclosed relay. This 20A SPDT relay is built to handle mains and auxiliary loads—ideal for power supplies, alarm circuits, access control and monitoring systems. The multi-voltage coil accepts 24 VAC/DC, 120 VAC or 208–277 VAC, reducing the number of spare parts you need on site and supporting diverse controller outputs. UL-listed to UL916 (Energy Management) and UL864 (Fire), the RIB2421B meets common regulatory requirements for safety and fire-panel applications. Its compact enclosed housing and screw-mount form factor protect components and save panel real estate, while color-coded leads cut wiring time and lower installation errors. With a low-current coil draw and 20A contact rating, this relay delivers efficient, long-lasting switching performance for both intermittent alarm duty and continuous monitoring. Specify the Functional Devices RIB2421B for reliable, code-compliant switching in security, surveillance and building management projects—order now or contact our sales team for application support and volume pricing.
Features
- Reliable heavy-duty switching: 20A SPDT contacts provide dependable control for alarms, power supplies and auxiliary loads in security and building systems
- Wide coil voltage compatibility: accepts 24VAC/DC, 120VAC and 208–277VAC to reduce SKUs and simplify installations
- UL-listed for code compliance: UL916 (Energy Management) and UL864 (Fire) approvals for use in monitoring and fire/security applications
- Faster installation and service: enclosed, screw-mount design with color-coded leads minimizes wiring errors and saves panel space
- Low coil current and robust construction: efficient operation reduces drive requirements and delivers long-term reliability under continuous monitoring duty
| General Information | |
|---|---|
| Brand Name | Functional Devices |
| Manufacturer | Functional Devices, Inc |
| Product Name | RIB2421B Relay |
| Product Type | Relay |
| Product Model | RIB2421B |
| Application/Usage | Power Supply |
| Country of Origin | US |
| Manufacturer Part Number | RIB2421B |
| Physical Characteristics | |
| Depth | 1.80" |
| Width | 3.20" |
| Height | 2.30" |
| Form Factor | Screw Mount |
| Product Information | |
| Mount Type | Screw Mount |
| Contact Type | SPDT (Single Pole Double Throw) |
| Warranty | |
| Limited Warranty | 1-Year |
| Miscellaneous | |
| Environmentally Friendly | Yes |
| Environmental Certification | RoHS, WEEE |
No matching specifications
Try a different term, such as a connector type or resolution.
Plan your purchase
Is this right for your project?
Confirm the model, required accessories and delivery needs before ordering.
- SKU:
- RIB2421B
- Manufacturer part:
- RIB2421B
How do I confirm compatibility?
Check the specifications and manufacturer documents for your existing system. Send us your model numbers and project requirements if you need help selecting equipment or accessories.
Ask a product specialistWhen will this item ship?
Availability is shown above. Special-order items and project quantities may need additional lead time. Contact us to confirm a delivery date before scheduling installation.
Shipping, freight and delivery detailsWhat should I know about returns?
Returns require an approved RMA. Consult the linked return policy for deadlines and eligibility. For standard non-defective returns, eligible factory-sealed items carry a 15% restocking fee and customer-paid return shipping; open-box and used items are refused. Defective and DOA claims follow the policy's separate terms. Special orders and other exclusions are final sale.
Read return eligibility and exclusionsFunctional Devices RIB2421B Enclosed Relay 20A SPDT with 24V AC/DC/120V AC/208-277V AC Coil
RIB2421B