Eaton CB2533B120480AO Pringle bolted pressure contact switch - UL Listed
Part Number: CB2533B120480AO
Quick Summary
Eaton CB2533B120480AO is a pringle bolted pressure contact switch designed for high-current protection in heavy-duty switchgear. Engineers rely on robust protection and clear status signaling to minimize unplanned downtime. This unit delivers 2500A at 120V control with 480V system voltage and three-pole operation, while offering bottom-feed wiring for easier installation in large electrical rooms. UL Listed certification supports safety compliance, and its NEMA ratings—1, 3R, 4, and 12—confirm suitability for indoor and harsh environments. Optional features such as Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, and Auxiliary Contacts provide flexibility for preventive maintenance and fault isolation. The combination of reliability, scalability, and straightforward integration helps procurement and maintenance teams reduce total cost of ownership.
Product Information
Extended Description
CB2533B120480AO Eaton: Eaton pringle bolted pressure contact switch,BFD with three off lights (does not trip),2500A,120V,Bottom feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB2533B120480AO
UPC
782116952922
Product Length/Depth
17 in
Product Height
32 in
Product Width
28 in
Product Weight
235 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Catalog Notes
OPTIONAL Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, Kirk Provisions, Auxiliary Contact Provisions, AVAILABLE.
Feed type
Bottom
Fuse configuration
Bottom feed
Ground
No ground fault
Number Of Poles
Three-pole
Number of wires
3
Switch type
Electrical trip with charge-before-close mechanism
Type
Pringle bolted pressure contact switch
Amperage Rating
2500A
Control voltage
120 V
NEMA rating
NEMA 1, NEMA 3R, NEMA 4, NEMA 12
Protection
Fusible
System voltage
480 V
Voltage - max
480 V
Voltage rating
480 V
Special features
BFD with three normally off lights (does not trip)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB2533B120480AO
Feature: High amperage and system voltage ratings—2500A at 480V with a 120V control circuit. Business Impact: Enables direct switching of large motors and feeders with reduced device count, lowering wiring complexity and potential fault points. Application: Ideal for motor control centers and heavy-load distribution in manufacturing facilities. Feature: Bottom-feed, three-pole, three-wire configuration. Business Impact: Simplifies field wiring, improves safety during installation, and minimizes panel footprint. Application: Suitable for compact switchgear housings and large electrical rooms with strict space constraints. Feature: Fusible protection integrated with three-pole design. Business Impact: Provides fast fault isolation and coordinated protection, helping extend equipment life and reduce downtime. Application: Critical in process plants and heavy industry where reliable protection is required. Feature: Status indication with BFD lights (three normally-off lights) that do not trip. Business Impact: Delivers immediate visibility of device status, reducing diagnostic time and maintenance labor. Application: Routine monitoring in active power distribution systems. Feature: Optional Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, and Auxiliary Contacts. Business Impact: Enhances diagnostics, improves safety margins, and supports compliance with preventive maintenance programs. Application: Configurable protection schemes for complex electrical networks. Feature: UL Listed with compatible NEMA ratings (1, 3R, 4, 12). Business Impact: Confirms safety and enclosure suitability across indoor and potentially harsh environments, simplifying procurement and acceptance testing. Application: Enclosure planning for industrial facilities and climate-controlled plants. Feature: Rugged build and substantial footprint (17 in x 28 in x 32 in) with 235 lb weight. Business Impact: Indicates high reliability and longevity in demanding environments, justifying capital investment. Application: Large-scale power Distribution Equipment rooms and MCCs with strict space and load considerations. Warranty and service note: 1-year from installation or 18 months from shipment, whichever occurs first, supporting long-term service planning and total cost of ownership calculations.
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FAQs
The CB2533B120480AO uses a bottom-feed configuration, which simplifies wiring runs and minimizes panel depth in large electrical rooms. Plan for a robust mounting surface to support the 235 lb weight and ensure clear access to the three-wire, three-pole connections. Allow space for optional accessories such as Ground Fault Relay or Aux contacts and verify compatibility with intended enclosures (NEMA 1, 3R, 4, 12).
This switch is rated for 2500A with a 480 V system voltage and a 120 V control voltage. It operates as a three-pole, three-wire device with fusible protection, suitable for high-current motor protection and heavy-load feeders in switchgear and MCC assemblies.
Yes, the CB2533B120480AO is UL Listed. It supports NEMA-rated enclosures including 1, 3R, 4, and 12, making it compatible with standard indoor and harsher environment installations. When planning enclosure selection, consider the bottom-feed wiring and the device’s three-pole, three-wire configuration for proper fit and safe operation.
Yes. Optional Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, and Auxiliary Contacts can be specified to enhance protection and diagnostics. These options support preventive maintenance programs, improve fault isolation, and enable integration with monitoring systems in modern power distribution schemes.
The unit’s fusible protection and optional diagnostic features help reduce downtime by enabling faster fault identification. With a one-year warranty (or 18 months from shipment) and UL-listed safety compliance, maintenance planning becomes more predictable. Its high current rating and durable build support longer service life in demanding environments, contributing to lower total cost of ownership.