Eaton CB2533B120480GRAX bolted pressure switch - UL
Part Number: CB2533B120480GRAX
Quick Summary
Eaton CB2533B120480GRAX is a bolted pressure switch designed for robust motor protection in industrial power distribution. It helps prevent nuisance trips and downtime by using a capacitor trip device and a controlled charge-before-close mechanism. UL Listed certification backs reliability, while NEMA 1, 3R, 4, and 12 enclosure compatibility supports safe operation in challenging environments. With a 480 V system voltage, 2500 A amperage rating, and 120 V control voltage, it aligns with demanding industrial power circuits, delivering dependable protection. This product's bottom feed and three-pole configuration simplify installation in existing panels, while optional ground fault relay and blown fuse detection help meet extended protection schemes. In practice, engineers report reduced nuisance trips and easier maintenance planning thanks to dependable actuation and clear protection coordination.
Product Information
Extended Description
CB2533B120480GRAX Eaton: Eaton pringle bolted pressure contact switch,Single-phase relay with capacitor trip device (SPVR), BFD with no lights (trips switch),2500A,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB2533B120480GRAX
UPC
782116952755
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
Ground fault with control power transformer
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
Single-phase voltage relay with capacitor trip device (SPVR), BFD with no lights (trips switch)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB2533B120480GRAX
Feature SPVR capacitor trip device is included for single-phase protection; Business Impact: improves protection coordination and reduces the likelihood of downstream faults, leading to shorter downtime and safer startup sequences. Application: motor control centers and process lines where precise trip timing matters. This capability translates to measurable efficiency gains and safer operation in high-current distributions. Paragraph two highlights bottom feed and fuse configuration; Business Impact: simplifies retrofits and minimizes wiring complexity during panel upgrades. Application: refurbishments in existing switchgear where space and wiring routes are constrained. Paragraph three focuses on three-pole, three-wire design with optional ground fault protection; Business Impact: enhances fault detection and safety, supporting compliance in facilities with stringent grounding requirements. Application: power distribution in manufacturing and data-compliant spaces. Paragraph four covers NEMA enclosure compatibility; Business Impact: enables operation in harsh environments without enclosure modifications, lowering total installed cost. Application: outdoor or dusty environments where rugged protection is needed. Paragraph five notes UL Listed status and warranty; Business Impact: provides regulatory confidence and predictable service life, reducing lifecycle risk. Application: any installation requiring proven, supported protection with long-term supplier backing. Paragraph six addresses installation and maintenance efficiency; Business Impact: easier commissioning, fewer unplanned trips, and clearer protection coordination, delivering a lower total cost of ownership for critical power circuits.
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FAQs
CB2533B120480GRAX uses bottom feed, three-pole design and 480 V system voltage with 120 V control, making it compatible with NEMA 1, 3R, 4, and 12 enclosures. It fits motor protection schemes in switchgear and MCCs, and supports straightforward retrofits in existing panels thanks to its bottom-feed configuration and fusible protection options.
The SPVR capacitor trip device provides a controlled, rapid opening during abnormal conditions while the charge-before-close mechanism ensures the contacts close only after proper capacitor charge. This reduces nuisance trips, improves protection coordination, and enhances safety for single-phase and feeder protection in intensive industrial drives.
Yes. The unit carries UL Listing and is compatible with NEMA ratings 1, 3R, 4, and 12, enabling operation in dusty, wet, or hazardous surroundings when installed in the appropriate enclosure. Bottom feed and fusible protection add ruggedness, making it suitable for harsh manufacturing floors, data centers, and outdoor equipment rooms.
The CB2533B120480GRAX is UL Listed, indicating recognized safety compliance for industrial electrical equipment. Its design supports operation with NEMA-rated enclosures (1/3R/4/12) and a 480 V system, with optional ground fault and auxiliary provisions to meet specific safety and protection standards in regulated facilities.
The high-current 2500 A rating and reliable SPVR-based protection reduce downtime and fault propagation, improving overall uptime. UL Listing and rugged construction lower regulatory risk, while optional features like ground fault relay simplify preventive maintenance. The result is lower lifecycle costs through fewer trips, easier diagnostics, and longer asset life in critical power circuits.