Eaton CB4033B120480KGR5 Bolted Pressure Contact Switch - UL Listed
Part Number: CB4033B120480KGR5
Quick Summary
Eaton pringle bolted pressure contact switch protects high-demand equipment by delivering reliable interlock and trip functionality in control panels. Engineers often battle nuisance trips and slow fault diagnosis, driving downtime and escalating maintenance costs. This unit carries UL Listed certification and supports broad NEMA 1, 3R, 4 and 12 enclosure applications, aligning with strict electrical safety standards. Its bottom-feed design, three-pole configuration, and fusible protection simplify installation and improve wiring accessibility, delivering robust ground fault protection where needed. In practice, this means safer operations, faster fault isolation, and improved service life for industrial switchgear and control systems.
Product Information
Extended Description
CB4033B120480KGR5 Eaton: Eaton pringle bolted pressure contact switch,Interlock, single-phase relay with capacitor trip device (SPVR),4000A,1NO-1NC,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB4033B120480KGR5
UPC
782116950423
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.
Contact configuration
1 NO-1 NC
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)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB4033B120480KGR5
Feature → Business Impact → Application: The CB4033B120480KGR5 employs a three-pole design with 1 NO-1 NC contact configuration and a 4000A amperage rating, paired with 120 V control voltage. This combination enables high-current motor protection and reliable control signaling while simplifying control wiring and reducing arc-flash risk in large switchgear assemblies. Application: motor control centers and factory automation panels benefit from safer startups and reduced panel footprint. Feature → Business Impact → Application: Interlock with a capacitor trip device (SPVR) provides a controlled trip sequence that prevents unsafe closing and minimizes nuisance trips. This translates to improved equipment uptime and predictable protection during transient events. Application: press lines and conveyors requiring robust single-phase protection. Feature → Business Impact → Application: Ground fault protection with an integrated control transformer enhances personnel safety and minimizes electrical shock risk, aligning with NFPA 70E and other safety standards. Application: plant protective relays and emergency-stop circuits. Feature → Business Impact → Application: Bottom feed and fusible protection simplify installation, reduce wiring complexity, and enable straightforward fuse replacement. Application: retrofit projects and new installations in compact enclosures. Feature → Business Impact → Application: NEMA 1, 3R, 4, 12 compatibility ensures reliable performance in damp, dusty, and corrosive environments. Application: outdoor enclosures and washdown-ready panels. Feature → Business Impact → Application: Optional auxiliary contact and Kirk provisions, ground fault relay options, and auxiliary contact provisions offer expandable control schemes and easier maintenance. Application: scalable control architectures and future-proof installations.
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FAQs
CB4033B120480KGR5 uses a bottom-feed configuration and three-pole 1 NO-1 NC contact arrangement, making it compatible with many 480V switchgear and motor control center footprints. Ensure enclosure clearance, proper grounding, and alignment with Kirk provisions or auxiliary contact add-ons for seamless retrofits.
With a 4000A amperage rating and 480V system voltage, this switch provides robust protection for large motors and feeders. The SPVR capacitor trip device ensures a controlled, reliable trip sequence, reducing arc-flash risk and minimizing unnecessary outages in demanding environments.
Yes, the CB4033B120480KGR5 lists broad NEMA ratings (1, 3R, 4, 12), which cover indoor, outdoor, and damp or dirty environments. Combined with UL Listed certification, the design supports compliant operation in harsh industrial settings.
The unit includes ground fault protection with control power transformer and optional grounds-relay provisions. Optional accessories such as auxiliary contacts and ground fault relay options can extend monitoring capabilities and integration with plant-wide safety systems.
The fusible protection and bottom-feed design simplify fuse replacement and wiring scoping, reducing maintenance time. Reliable interlock and trip performance translate to lower downtime, faster fault isolation, and improved uptime for critical machinery and line processes, delivering a favorable total cost of ownership.