Eaton CB3033B120480K5 Bolted Contact Switch - UL Listed
Part Number: CB3033B120480K5
Quick Summary
Eaton CB3033B120480K5 bolted pressure contact switch provides high-current interlock protection for industrial switchgear. Engineers often struggle with grounding faults, nuisance trips, and long downtimes when selecting protective switching devices. This unit carries UL Listed safety certification and supports installation in durable enclosures with NEMA ratings such as 1, 3R, 4, and 12, aligning with common industrial environments. The combination of a 3000 A amperage rating, 1NO-1NC contact configuration, and bottom-feed design reduces wiring complexity while maintaining rugged performance. Optional ground-fault relay, fuse protection, and auxiliary contact provisions offer flexibility for varied control schemes. In practice, it helps facilities meet safety and reliability targets while enabling efficient maintenance in plant automation and motor control applications.
Product Information
Extended Description
CB3033B120480K5 Eaton: Eaton pringle bolted pressure contact switch,Interlock,3000A,1NO-1NC,120V,Bottom feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB3033B120480K5
UPC
782116951598
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
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
3000A
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
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB3033B120480K5
Feature: High-current protection with a 3000 A amperage rating and a three-pole configuration (1 NO-1 NC). Business Impact: Enables safe switching of large motors and feeders, reducing protection-related downtime while improving reliability in heavy-automation environments. Application: Ideal for motor control centers and power distribution panels requiring robust interlock protection and charge-before-close operation. Long-tail keywords addressed include bolted pressure switch, high-current interlock, 1NO-1NC configuration, and three-pole protection. Feature: Bottom feed and fusible protection provide straightforward wiring and short-circuit safety. Business Impact: Simplifies installation and enhances fault isolation, lowering maintenance costs over the product lifecycle. Application: Great for compact switchgear layouts where wiring access is from the bottom and fuse protection is desired. Long-tail keywords: bottom feed switch, fusible protection, low-downtime wiring. Feature: Interlock capability and optional Ground Fault Relay support safe maintenance procedures. Business Impact: Reduces human error during servicing and supports lockout-tagout practices in safety-critical automation. Application: Maintenance-friendly protection in industrial automation and motor control centers. Long-tail keywords: interlock, ground fault relay, auxiliary contact provisions. Feature: 480 V system compatibility with 120 V control voltage and UL Listed safety validation. Business Impact: Facilitates seamless integration with existing 480 V distribution in plant infrastructure while meeting safety standards. Application: Large-scale electrical distribution, plant automation, and machinery protection. Long-tail keywords: 480 V system, control voltage 120 V, UL Listed. Feature: Documentation and catalog support including optional features like Ground Fault Relay, Blown Fuse Detection, and Single Phase Protection. Business Impact: Offers scalable protection plans and quick deployment using Eaton resources. Application: Modernized protection schemes in industrial facilities. Long-tail keywords: catalog notes, ground fault, blown fuse detection, single-phase protection.
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FAQs
The CB3033B120480K5 uses a three-pole arrangement with a 1NO-1NC contact setup and bottom-feed wiring. Connect the 480 V power lines to the three poles and the 120 V control circuit to the coil/auxiliary terminals as specified in the Eaton catalog. Ensure the fuse configuration is bottom-fed and that the device is mounted in a UL-listed enclosure compatible with NEMA ratings 1, 3R, 4, or 12. Optional ground fault relay can be added per catalog notes. This approach minimizes wiring complexity while maintaining robust interlock protection.
Key specs include a 3000 A amperage rating, 480 V maximum system voltage, and 120 V control voltage, with a 1NO-1NC contact configuration and fusible protection. The device supports UL Listed safety certification and is compatible with NEMA-rated enclosures (1, 3R, 4, 12). Reliability is enhanced by the interlock mechanism and charge-before-close trip, which reduce misoperation during startup and maintenance in heavy-duty applications.
Yes. The three-pole, 1NO-1NC configuration with bottom-feed fusible protection is designed for high-current interlock duties in motor control centers and power distribution panels. Its 480 V system compatibility, 120 V control voltage, and UL Listed rating ensure safe integration with industrial automation ecosystems. Optional features such as ground fault detection and auxiliary contacts extend protection for complex control schemes commonly found in plant-wide motor protection strategies.
The CB3033B120480K5 is UL Listed, a recognized safety standard for electrical equipment. The unit also supports operation within NEMA-rated enclosures (1, 3R, 4, 12), aligning with typical industrial environments. Optional features like ground fault relay and single-phase protection provide additional compliance options for specialized installations, while Eaton’s documentation offers guidance for meeting site-specific electrical codes and safety requirements.
The bolted pressure contact switch reduces downtime through robust interlock protection and reliable fault isolation, which translates to lower maintenance costs and fewer unscheduled outages. Its bottom-feed design simplifies wiring, while the 120 V control voltage and 480 V system compatibility streamline integration with existing electrical infrastructure. The availability of optional features (ground fault, blown fuse detection, auxiliary contacts) supports scalable protection and a faster return on investment in plant automation projects.