Eaton CB4033B120480G Pringle switch - UL Listed
Part Number: CB4033B120480G
Quick Summary
Eaton CB4033B120480G is a pringle bolted pressure contact switch designed for heavy-duty motor protection in industrial power systems. Maintenance teams struggle with nuisance trips and fuse failures, especially in harsh environments where reliability is critical; this unit combines an electrical trip with a charge-before-close mechanism to improve selectivity and safety. With UL Listed certification and compatibility with NEMA 1, 3R, 4, and 12 enclosures, it meets common industrial codes while staying robust in wet, dusty, or corrosive settings. The included control power transformer simplifies control wiring and reduces panel space needs, delivering streamlined installation. For facility managers, it translates to higher uptime, lower maintenance costs, and more predictable protection in low-voltage switchgear and distribution networks.
Product Information
Extended Description
CB4033B120480G Eaton: Eaton pringle bolted pressure contact switch,With control power transformer,4000A,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB4033B120480G
UPC
782116899463
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
With control power transformer
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 - CB4033B120480G
Feature: 4000A amperage rating at 480V provides robust protection for large motors and feeder circuits. This translates to fewer catastrophic overloads and reduced replacement costs. Application: ideal for main feeders in manufacturing plants and distribution panels where high current fault isolation is critical. Feature: Integrated control power transformer simplifies control wiring and reduces panel space requirements. Business impact: lowers installation time and wiring complexity, enabling faster commissioning and fewer field wiring errors. Application: well-suited for motor control centers and compact switchgear footprints in new builds or retrofits. Feature: Ground fault protection with a control power transformer enhances personnel safety and fault detection. Business impact: improves regulatory compliance and reduces shock risk in live equipment. Application: suitable for machines and lines where grounding integrity is critical and where ground fault relays are a planned option. Feature: NEMA ratings compatibility supports enclosures for a wide range of environments. Business impact: provides installation flexibility and easier certification across sites. Application: retrofit and new-build projects requiring reliable enclosure performance in wet, dusty, or corrosive settings. Feature: Three-pole, bottom-feed, fusible design with charge-before-close switching ensures safe, coordinated tripping. Business impact: minimizes electrical stress on downstream devices and enhances personnel safety. Application: three-phase distribution networks and switchgear in heavy industry.
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FAQs
The CB4033B120480G is a three-pole, fusible bolted pressure contact switch designed for bottom-feed installation in low-voltage switchgear. For compatibility, verify enclosure type (NEMA 1, 3R, 4, 12), confirm 480 V system voltage with a 120 V control circuit, and plan for the integrated control power transformer to simplify wiring. Ensure proper wiring practices and clearances per UL guidelines to optimize performance and safety.
Key specs include a 4000 A amperage rating, 480 V system voltage, and 120 V control voltage. The unit is UL Listed and supports NEMA 1, 3R, 4, 12 enclosures. It operates as a three-pole, three-wire fusible device with a charge-before-close mechanism, providing reliable protection for high-current motors and feeders in industrial environments.
Yes, the CB4033B120480G is compatible with NEMA-rated enclosures including 1, 3R, 4, and 12, which cover a range of damp, dusty, and harsh environments. For extreme dust or moisture, select the appropriate enclosure and sealing, and consider optional accessories like ground fault or auxiliary contacts to meet site-specific safety requirements.
The device is UL Listed, indicating compliance with widely recognized safety standards for electrical equipment. It also offers compatibility with common NEMA enclosure types, supporting regulatory alignment for industrial installations and reducing the need for extensive field testing when paired with compatible panels.
The built-in control power transformer simplifies wiring, reducing commissioning time and ongoing maintenance labor. The rigid protection (fusible, trip-before-close) minimizes nuisance trips and potential motor damage, translating to higher uptime, lower repair costs, and a faster return on investment in facilities with heavy-duty motors and frequent power transients.