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RIB Enclosed Pre-Wired Relay: 20 A Rating, 24V AC/DC/230V AC/208-277V AC, SPDT - General Purpose Power Relays
RIBGeneral Purpose Power Relays

RIB Enclosed Pre-Wired Relay: 20 A Rating, 24V AC/DC/230V AC/208-277V AC, SPDT

The RIB Enclosed Pre-Wired Relay is a general purpose power relay with a 20 A rating, SPDT configuration, and a 0.50 in NPT nipple size. It supports coil voltages of 24V AC/DC, 230V AC, and 208-277V AC, as specified…

SKU 3G-OTH-37526

Brand
RIB
Item
Enclosed Pre-Wired Relay: 20 A Rating, 24V AC/DC/230V AC/208-277V AC, SPDT
Category
General Purpose Power Relays
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Technical Specifications

RIB
Manufacturer Part Number
RIB2421B
Type
SPDT
NPT
0.50 in
Nipple Size
0.50 in NPT
Coil Voltage
24V AC/DC/230V AC/208-277V AC
AC/DC/230V AC/208-277V AC
24V
View Full Spec Sheet

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RIB Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The RIB Enclosed Pre-Wired Relay is a general purpose power relay with a 20 A rating, SPDT configuration, and a 0.50 in NPT nipple size. It supports coil voltages of 24V AC/DC, 230V AC, and 208-277V AC, as specified by the manufacturer part number RIB2421B.

Frequently Asked Questions

What is the RIB Enclosed Pre-Wired Relay used for?

The RIB Enclosed Pre-Wired Relay is used for general purpose power switching in HVAC, lighting, and industrial control panels. Its 20 A rating and SPDT configuration make it suitable for on/off control of motors, pumps, and resistive loads in commercial buildings and factories.

What are the specifications of the RIB2421B relay?

The RIB2421B relay has a 20 A rating, SPDT contacts, and a 0.50 in NPT nipple size. It accepts coil voltages of 24V AC/DC, 230V AC, and 208-277V AC. The enclosed pre-wired design simplifies installation in junction boxes or control panels.

Where to buy the RIB Enclosed Pre-Wired Relay worldwide?

You can source the RIB Enclosed Pre-Wired Relay through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on the RIB2421B relay.

How to install the RIB Enclosed Pre-Wired Relay?

Mount the relay using the 0.50 in NPT nipple into a standard knockout. Connect the coil voltage (24V AC/DC, 230V AC, or 208-277V AC) per the wiring diagram on the enclosure. Ensure the load does not exceed 20 A. Follow local electrical codes and use appropriate conduit seals.

Used in

Common applications for RIB
HVAC control — RIB enclosed pre-wired relays (e.g., RIB2421C) for switching fan coils and damper actuators
Lighting control — RIB wireless relays (RIBW208B-EN3) for remote switching of high-bay or parking lot lighting
Pump monitoring — RIB adjustable current sensing relay (RIBXKTA) for detecting dry-run conditions in water pumps
Process automation — RIB 3PST-NO relays (RIB013P) for interlocking conveyor systems or motor starters
Building management — RIB wireless transmitter/receiver pairs for retrofitting legacy control panels without new wiring

RIB Products

3G Electric supplies RIB general purpose power relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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