Eaton CB1633B120480KAX7 Pringle bolted switch - UL Listed
Part Number: CB1633B120480KAX7
Quick Summary
CB1633B120480KAX7 is a bolted pressure contact switch designed for high-current motor protection in industrial power distribution applications. It helps ensure rapid and reliable trips to prevent damage during fault events, reducing downtime and maintenance costs. Operators will appreciate its rugged construction and integration-friendly features, including a three-pole, three-wire configuration with bottom feed and fusible protection. The unit is UL Listed and compatible with multiple NEMA enclosures including 1, 3R, 4, and 12, enabling use in dusty, damp, or harsh environments. By combining a 1600A amperage rating with 480V system voltage and 120V control, it supports safe, compliant control panels and streamlined installation. This translates into improved uptime, easier compliance, and lower total cost of ownership for industrial facilities.
Product Information
Extended Description
CB1633B120480KAX7 Eaton: Eaton pringle bolted pressure contact switch,Interlock, BFD with no lights (trips switch),1600A,2NO-2NC,120V,Bottom feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633B120480KAX7
UPC
782116958399
Product Length/Depth
16 in
Product Height
32 in
Product Width
24 in
Product Weight
200 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
1600A
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, BFD with no lights (trips switch)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB1633B120480KAX7
High-current capability and versatile ratings reduce system complexity. The CB1633B120480KAX7 delivers up to 1600A and 480V system voltage with a 120V control circuit, enabling direct motor protection for large loads. With a three-pole, 2NO-2NC contact configuration and bottom-feed wiring, it supports compact, safer panel layouts while minimizing conductor count. Electrical trip with charge-before-close and an interlock provide enhanced safety and reliable sequencing in start-up and fault conditions. The BFD option with no indicator lights keeps the user interface clean while delivering fail-safe operation in critical automation configurations. UL Listed certification and broad NEMA ratings (1, 3R, 4, 12) extend service life in demanding environments. Optional features such as Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, and Auxiliary Contacts give you scalable protection without replacing the switchgear. Installation and compatibility are straightforward thanks to bottom feed and fusible configuration aligned with standard switchgear practices. Kirk provisions and auxiliary contact provisions provide field-modification paths, while three-wire, 480V control integration minimizes rewiring during upgrades. Designed for reliability, the unit comes with Eaton's warranty policy and a rugged enclosure that withstands industrial conditions. Proactive maintenance planning is simplified by the available accessory options and clear diagnostic features, delivering lower maintenance costs and higher uptime.
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FAQs
When installing CB1633B120480KAX7, plan for bottom-feed wiring and fusible configuration to match your switchgear. Ensure a three-pole, three-wire setup with 480V system voltage and 120V control voltage to guarantee proper trip signaling. Verify enclosure compatibility with NEMA 1, 3R, 4, or 12 environments and leave adequate clearance for heat dissipation and cable routing in the control panel.
Key specs include a 1600A amperage rating, 480V system voltage, 120V control voltage, and a three-pole, 2NO-2NC contact configuration. The device is fusible and designed for bottom feed with three wires. It is UL Listed and compatible with NEMA ratings 1, 3R, 4, 12, making it suitable for heavy-duty motor protection and control applications.
Yes. The switch carries UL Listed certification and supports broad NEMA enclosure ratings (1, 3R, 4, 12), enabling operation in dusty, damp, or otherwise challenging industrial settings. Optional protections such as Ground Fault Relay and Blown Fuse Detection further enhance reliability in demanding processes.
Maintenance for this device centers on routine inspection of connections, verification of the fuse status, and confirmation of trip-functionality during periodic tests. Eaton provides a warranty policy (25-000) that offers one year from installation or eighteen months from shipment, whichever occurs first, reinforcing long-term protection for critical automation assets.
The CB1633B120480KAX7 delivers improved uptime through reliable fault-trips and robust construction, reducing unplanned downtime and repair costs. Its compatibility with UL Listed standards and broad NEMA ratings minimizes additional enclosure work, while optional features enable scalable protection without costly panel redesigns, delivering a favorable total cost of ownership over the life of a power distribution system.