Eaton CB4033B120480KGRAX Bolted Pressure Switch - UL Listed
Part Number: CB4033B120480KGRAX
Quick Summary
Eaton CB4033B120480KGRAX bolted pressure contact switch is designed to deliver high-current protection for switchgear and motor control centers. This solution helps engineers prevent cascading faults and ensure safe, fast tripping in demanding industrial environments. Installing a heavy-duty device like this can be challenging without clear guidance on wiring, enclosure compatibility, and safety interlocks. The unit carries UL Listed safety certification and is compatible with robust enclosure standards, including NEMA 1, 3R, 4, and 12 configurations, while its interlock and capacitor trip features support reliable trip-before-close protection. In practice, this translates to reduced downtime, easier maintenance, and improved overall system reliability for critical power distribution applications.
Product Information
Extended Description
CB4033B120480KGRAX Eaton: Eaton pringle bolted pressure contact switch,Interlock, single-phase relay with capacitor trip device (SPVR), BFD with no lights (trips switch),4000A,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB4033B120480KGRAX
UPC
782116950416
Product Length/Depth
22.5 in
Product Height
32 in
Product Width
40 in
Product Weight
430 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
4000A
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
Interlock, single-phase voltage relay with capacitor trip device (SPVR), BFD with no lights (trips switch)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - CB4033B120480KGRAX
Feature: 4000A Amperage Rating → Business Impact → Application: Enables protection of large feeders and main distribution paths, reducing the risk of catastrophic faults and unplanned outages in heavy-traffic switchgear. Application: Ideal for power distribution centers and industrial plants handling high fault currents with demanding uptime requirements. Feature: 120 V Control Voltage with SPVR and capacitor trip device → Business Impact → Application: Delivers reliable trip sequencing and fast fault isolation, minimizing arc flash exposure and equipment wear. Application: Suitable for motor control centers and feeder circuits that require precise trip-before-close protection in hazardous environments. Feature: Three-Pole, Bottom Feed, Ground Fault with control transformer → Business Impact → Application: Simplifies wiring geometry and improves fault detection in complex rack layouts, enabling safer and quicker maintenance. Application: Best for large switchgear assemblies where bottom-entry wiring is preferred for space and wiring management. Feature: NEMA Compatibility (NEMA 1, 3R, 4, 12) → Business Impact → Application: Provides flexible mounting options and environmental resilience in harsh industrial settings, reducing enclosure upgrades and retrofit costs. Application: Suitable for outdoor or damp indoor installations where enclosure rating matters. Feature: Optional Ground Fault Relay, Blown Fuse Detection, Auxiliary Contacts → Business Impact → Application: Enhances protection schemes and system visibility, lowering unplanned downtime and enabling easy integration with annunciation systems. Application: Customizable protection in critical facilities such as data centers, chemical plants, and manufacturing lines.
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FAQs
This unit uses a bottom feed configuration and is a three-pole, fusible switch with a capacitor trip device (SPVR). For retrofit or new builds, ensure enclosure space accommodates the 22.5 in depth, 32 in height, and 40 in width. Verify mounting provisions, wiring clearance, and availability of auxiliary contacts if required for control circuits.
The switch is rated for 4000A with a 120 V control circuit and 480 V system voltage. It provides fusible protection and a trip-before-close mechanism with SPVR. The unit is designed for three-pole operation and supports ground fault protection through the associated transformer and optional relay configurations.
Yes. The three-pole, bottom-feed configuration with high-current capability and interlock features makes it well-suited for motor control centers and heavy feeders in manufacturing. SPVR enhances safety by ensuring safe sequencing, while the robust enclosure ratings support installation in demanding environments.
The CB4033B120480KGRAX is UL Listed, providing essential safety certification for electrical devices. While CE or SIL ratings are not listed for this model, design plans in some regions may require CE compliance or SIL considerations for specific safety programs. Always verify regional regulatory requirements and enclosure IP considerations when deploying in new markets.
Warranty is Eaton’s standard policy: 1 year from installation or 18 months from shipment, whichever occurs first. Optional features include Ground Fault Relay, Blown Fuse Detection, and Auxiliary Contact Provisions. For ongoing reliability, consider spare ground fault equipment and recommended preventive maintenance schedules aligned with your facility’s MTTR targets.