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RIB ESR2401B Enclosed Pre-Wired Relay - Emergency Lighting Bypass/Shunt Relays
RIBEmergency Lighting Bypass/Shunt Relays

RIB ESR2401B Enclosed Pre-Wired Relay

The RIB Enclosed Pre-Wired Relay is an emergency lighting bypass/shunt relay with a 20 A rating, SPDT configuration, and a 0.50 in NPT nipple size. It operates on a coil voltage of 24V AC/DC/120V AC (MPN ESR2401B).

SKU 3G-OTH-38877

Brand
RIB
Item
ESR2401B Enclosed Pre-Wired Relay
Category
Emergency Lighting Bypass/Shunt Relays
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

RIB
Manufacturer Part Number
ESR2401B
Nipple Size
0.50 in NPT
Coil Voltage
24V AC/DC/120V AC

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

Product Description

The RIB Enclosed Pre-Wired Relay is an emergency lighting bypass/shunt relay with a 20 A rating, SPDT configuration, and a 0.50 in NPT nipple size. It operates on a coil voltage of 24V AC/DC/120V AC (MPN ESR2401B).

Frequently Asked Questions

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

The RIB Enclosed Pre-Wired Relay (ESR2401B) is used as an emergency lighting bypass or shunt relay. It automatically overrides normal lighting controls to keep emergency fixtures powered during a power failure, ensuring code-compliant egress lighting in commercial and industrial buildings.

What are the specifications of the RIB ESR2401B relay?

The RIB ESR2401B is a 20 A rated, SPDT enclosed pre-wired relay with a 0.50 in NPT nipple size. It accepts a coil voltage of 24V AC/DC/120V AC. The relay is manufactured by RIB and is designed for emergency lighting bypass and shunt applications.

Where to buy the RIB ESR2401B relay worldwide?

You can source the RIB ESR2401B 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; we provide competitive pricing and reliable sourcing for this RIB relay.

How to install the RIB enclosed pre-wired relay?

Install the RIB relay by mounting it via the 0.50 in NPT nipple into a standard electrical enclosure. Connect the 24V AC/DC/120V AC coil leads per the wiring diagram, and wire the SPDT contacts for normally open or closed shunt operation. Always follow local electrical codes and the manufacturer's instructions.

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 emergency lighting bypass/shunt relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
General purpose power relay with SPDT contacts and 20 A rating. Coil voltage options: 24V AC/DC, 230V AC, 208-277V AC. Enclosed pre-wired design with 0.50 in NPT nipple for mounting in junction boxes or control panels. Suitable for on/off control of motors, pumps, and resistive loads in commercial and industrial applications
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General purpose power relay with SPDT contacts and 20 A rating. Coil voltage options: 24V AC/DC, 230V AC, 208-277V AC. Enclosed pre-wired design with 0.50 in NPT nipple for mounting in junction boxes or control panels. Suitable for on/off control of motors, pumps, and resistive loads in commercial and industrial applications
Enclosed pre-wired power relay with SPST-NO contacts, rated 20 A. Coil voltages include 24V AC/DC, 120V AC, and 208-277V AC. Nipple size is 0.50 in NPT. Suitable for on/off switching of motors, pumps, resistive loads, and lighting in commercial and industrial control panels
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Enclosed pre-wired power relay with SPST-NO contacts, rated 20 A. Coil voltages include 24V AC/DC, 120V AC, and 208-277V AC. Nipple size is 0.50 in NPT. Suitable for on/off switching of motors, pumps, resistive loads, and lighting in commercial and industrial control panels
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General purpose power relay with a 20 A rating and SPDT contact configuration. Coil voltage is 24V AC/DC/120V AC. Enclosed and pre-wired with a 0.50 in NPT nipple for conduit mounting. Suitable for switching loads in HVAC, lighting, and industrial control panels
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General purpose power relay with a 20 A rating and SPDT contact configuration. Coil voltage is 24V AC/DC/120V AC. Enclosed and pre-wired with a 0.50 in NPT nipple for conduit mounting. Suitable for switching loads in HVAC, lighting, and industrial control panels
General purpose power relay with DPDT contacts, 10 A rating, and coil voltage of 24V AC/DC/120V AC. Features a 0.50 in NPT nipple for mounting in junction boxes or control panels. Suitable for switching loads in HVAC, lighting, and industrial control applications
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General purpose power relay with DPDT contacts, 10 A rating, and coil voltage of 24V AC/DC/120V AC. Features a 0.50 in NPT nipple for mounting in junction boxes or control panels. Suitable for switching loads in HVAC, lighting, and industrial control applications
General purpose power relay with SPST-NO contact configuration, rated for 10 A. Coil voltage accepts 10-30V AC/DC or 120V AC. Enclosed design with pre-wired leads and 0.50 in NPT nipple for conduit mounting. Suitable for on/off control of motors, pumps, and other equipment in HVAC, lighting, and industrial control panels
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General purpose power relay with SPST-NO contact configuration, rated for 10 A. Coil voltage accepts 10-30V AC/DC or 120V AC. Enclosed design with pre-wired leads and 0.50 in NPT nipple for conduit mounting. Suitable for on/off control of motors, pumps, and other equipment in HVAC, lighting, and industrial control panels

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Emergency lighting bypass/shunt relay with DPDT configuration and 20 A rating. Enclosed and pre-wired with a 0.50 in NPT nipple for conduit mounting. Automatically switches lighting circuits to emergency power during mains failure, used in commercial and industrial facilities for safety egress
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Emergency lighting bypass/shunt relay with 20 A rating and DPDT contact configuration. Enclosed pre-wired unit with 0.50 in NPT nipple for conduit mounting. Used to switch emergency lighting circuits during power loss or testing in industrial facilities