Eaton CB4033B120480K7 Pressure Contact Switch - UL Listed
Part Number: CB4033B120480K7
Quick Summary
Eaton CB4033B120480K7 pressure contact switch enables high-current interlock protection in industrial switchgear. In demanding panels, unreliable protection translates to unplanned downtime and safety risks, so engineers need a robust, field-serviceable solution. This device is UL Listed and compatible with NEMA 1, 3R, 4 and 12 enclosures, with fusible protection and optional ground fault protection to match system safety requirements. Designed for reliability, it supports 4000 A interlocks and 480 V networks, while offering bottom-feed installation and straightforward wiring. By combining solid protection with easy serviceability, it helps shorten maintenance cycles, ensure compliance, and reduce total cost of ownership for power-distribution and control-panels.
Product Information
Extended Description
CB4033B120480K7 Eaton: Eaton pringle bolted pressure contact switch,Interlock,4000A,2NO-2NC,120V,Bottom feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB4033B120480K7
UPC
782116950485
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
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
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB4033B120480K7
Amperage rating of 4000A with a 480V system voltage and 120V control voltage delivers robust, reliable interlock protection for mission-critical equipment, reducing the risk of equipment damage and downtime. This high-current capability translates to fewer nuisance trips and smoother operation in heavy-load panels, supporting safer machine start-up and controlled shut-off in industrial environments. The 2NO-2NC, three-pole configuration provides flexible control logic and monitoring, enabling precise coordination with other safety devices and auxiliaries. Bottom feed and bottom-fuse configuration simplify retrofits and field installation, minimizing enclosure modification time while preserving wiring clarity. NEMA compatibility (1, 3R, 4, 12) and UL Listed certification ensure regulatory alignment and enclosure suitability in harsh industrial spaces, improving overall compliance and traceability. Optional Ground Fault Relay, Blown Fuse Detection, and Single Phase Protection extend fault-detection capabilities, reducing unexpected outages and enabling proactive maintenance planning. Interlock and auxiliary contact provisions offer compatibility with Kirk provisions and future expansion, supporting longer asset life and reduced total-cost-of-ownership in safety-critical applications.
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FAQs
Install CB4033B120480K7 with bottom feed in compatible enclosures supporting three-pole, 2NO-2NC operation. Connect 480 V system power and 120 V control circuits per the Eaton wiring diagram, ensuring proper wire sizing for 4000 A capacity. Use the bottom fuse arrangement to simplify retrofit, and verify grounding and clearance requirements to maintain safety margins and fault-clearing speed.
The device is rated for 4000 A with a 120 V control voltage and 480 V system voltage, designed as a 3-pole, 2NO-2NC switch with fusible protection. This combination supports high-current interlocks and rapid protective action in power-distribution panels, while enabling precise control logic and coordination with other safety devices to minimize risk during start-up and fault conditions.
Yes. The switch is UL Listed and compatible with NEMA ratings including 1, 3R, 4, and 12, making it suitable for a range of industrial environments from enclosed control panels to outdoor or damp locations when installed in appropriate enclosures. Bottom-feed configuration further simplifies integration into existing layouts without extensive cabinet modification.
CB4033B120480K7 carries UL Listed certification and supports NEMA 1, 3R, 4, and 12 enclosure compatibility. These certifications help ensure regulatory compliance, streamline safety audits, and reduce the time and cost of validation in engineering change notices (ECNs) and plant safety programs. Optional features like Ground Fault Relay do not alter core certifications but enhance reliability and protection coverage.
The switch supports high-current interlock protection with durable construction, reducing unplanned downtime and replacement frequency. A one-year warranty from installation or 18 months from shipment adds financial protection. With features like optional fault-detection (Ground Fault Relay) and Blown Fuse Detection, maintenance planning becomes proactive, lowering disruption costs and extending service intervals in continuous production lines.