Eaton CB3033B120480K7 Pringle bolted switch - UL Listed
Part Number: CB3033B120480K7
Quick Summary
Eaton CB3033B120480K7 bolted pressure contact switch provides high-current protection for industrial switchgear and motor control centers. Engineers often face downtime from ground faults, fuse failures, and mis-timed trips, driving maintenance costs and safety risks. UL Listed certification and NEMA ratings 1/3R/4/12 ensure regulatory compliance and reliable operation in harsh enclosures. With a bottom-feed, three-pole design and fusible protection, this switch supports optional ground fault, auxiliary contacts, and interlock features for scalable protection schemes. This solution pairs rugged build with Eaton’s service ecosystem to minimize downtime, streamline maintenance, and improve overall panel safety and reliability.
Product Information
Extended Description
CB3033B120480K7 Eaton: Eaton pringle bolted pressure contact switch,Interlock,3000A,2NO-2NC,120V,Bottom feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB3033B120480K7
UPC
782116951581
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
2 NO-2 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 - CB3033B120480K7
Feature: 3000A amperage rating enables direct switching of large feeders without staging or multiple devices. Business Impact: reduces heat buildup, lowers voltage drop, and minimizes switchgear footprint in large installations. Application: main feeders in power distribution panels and industrial motor control centers. The 3000A capability also supports future expansion without hardware changes. Feature: 2 NO-2 NC contact configuration provides versatile interlocking and control logic. Business Impact: simplify protective sequencing, reduce wiring complexity, and enhance safety interlocks. Application: machine-guarded lines and critical process areas requiring reliable trip-before-close control. Feature: Bottom feed and fuse configuration streamline wiring and cabinet layout. Business Impact: faster installation, easier maintenance, and improved fault isolation. Application: retrofit projects and new builds with compact, organized bus routing. Feature: Fusible protection combined with interlock capability improves safety margins and fault clearing performance. Business Impact: lowers risk of arc flash events and selective tripping. Application: high-energy circuits and safety-critical loads. Feature: UL Listed with broad NEMA compatibility (1/3R/4/12) supports regulatory compliance across industries. Business Impact: accelerates procurement approvals and simplifies enclosures selection. Application: control panels in harsh environments and mixed-use facilities. Feature: Optional Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, Auxiliary Contacts, and Kirk Provisions extend diagnostic and protection coverage. Business Impact: proactive fault detection and maintenance planning. Application: modular protection schemes for complex systems.
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FAQs
This unit is designed as a three-pole switch with bottom feed, 2NO-2NC contact configuration, and fusible protection. It supports three-wire wiring, accommodates 120 V control circuits, and handles 480 V system voltage, making retrofit and new installations straightforward while minimizing wiring complexity and cabinet space requirements.
Key specs include a 3000A amperage rating, 120 V control voltage, 480 V system voltage, and UL Listed certification with NEMA ratings 1/3R/4/12. These features deliver predictable tripping, robust interlock operation, and compatibility with harsh environments, reducing unplanned outages and ensuring regulatory compliance.
Yes. Catalog notes indicate optional Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, Auxiliary Contacts, and Kirk Provisions are AVAILABLE. Adding these options enhances diagnostics, improves fault localization, and enables tailored protection schemes for specific equipment or processes.
UL Listed certification is provided, and the unit offers NEMA ratings of 1, 3R, 4, and 12. These certifications support compliance across industrial facilities, meet safety standards for enclosures, and align with common electrical codes used in manufacturing and process environments.
The CB3033B120480K7 consolidates protection and interlock functions into a single device, reducing component count and wiring complexity. Its rugged build, high-current rating, and optional protective modules decrease downtime, enhance safety, and simplify maintenance planning, delivering measurable reductions in repair costs and improved process uptime over the equipment lifecycle.