Eaton CB1633B120480KAX5 Pringle Bolted Switch - UL Listed
Part Number: CB1633B120480KAX5
Quick Summary
Eaton CB1633B120480KAX5 bolted pressure contact switch is a rugged interlock solution for heavy-duty motor control panels. Engineers often struggle with space constraints, fuse coordination, and fault-detection timing in harsh environments. UL Listed certification and broad NEMA ratings—NEMA 1, 3R, 4, and 12—provide built-in compliance and protection for a wide range of applications. By aligning with bottom-feed configurations and a 1600A rating at 480V, this switch reduces footprint while improving reliability and service life. This combination delivers both practical installation advantages and measurable business value in industrial automation.
Product Information
Extended Description
CB1633B120480KAX5 Eaton: Eaton pringle bolted pressure contact switch,Interlock, BFD with no lights (trips switch),1600A,1NO-1NC,120V,Bottom feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633B120480KAX5
UPC
782116958405
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
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
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
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - CB1633B120480KAX5
Selling Policy 25-000 - Distribution and Control Products and Services
High current capability enables 1600A switching at 480V, reducing the need for staging multiple devices. The CB1633B120480KAX5 supports up to 1600A with a 480 V system, enabling single-device handling of high-inrush loads and simplifying panel designs. This translates to fewer components, lower installation time, and reduced point-of-use failure avenues in critical automation lines. The three-pole, 1NO-1NC contact configuration provides a defined control path for multi-line circuits. It aligns with bottom feed and bottom fuse arrangement, improving wiring density and fault isolation, while making replacement straightforward during preventive maintenance. Interlock and charge-before-close mechanism adds a critical safety layer during operation. The BFD feature prevents nuisance trips and ensures safe sequencing during startups. Optional Ground Fault Relay, Blown Fuse Detection, and Single-Phase Protection give you tailored protection schemes. Kirk Provisions and Auxiliary Contact Provisions enable expansion without replacing the base switch. Including these options helps meet safety standards and enables faster customization. UL Listed certification and broad NEMA ratings align with industrial compliance needs, reducing regulatory risk. The unit’s 16 x 24 x 32 in footprint and 200 lb weight are accounted for in installation planning, supporting rugged, space-conscious deployments in factories.
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FAQs
To fit standard panels, plan for bottom-feed wiring and fuse configuration compatible with a three-pole unit. The 16 in length, 32 in height, and 24 in width, along with a 200 lb weight, require adequate mounting clearance and panel cavity space. Ensure your enclosure supports UL Listed devices and accommodates potential auxiliary contacts or Kirk provisions if you plan to extend protection options.
Verify system voltage rating of 480V and amperage rating of 1600A to confirm compatibility with your feeders. Confirm the switch is configured as 3-pole with 1NO-1NC contacts, and check the fuse configuration as bottom feed. Confirm the NEMA protection levels (1, 3R, 4, 12) align with your enclosure and environment, and review ground fault and single-phase protection options if required.
Yes. The CB1633B120480KAX5 incorporates interlock and a charge-before-close mechanism to prevent unsafe startup sequences. Its three-pole, 1NO-1NC configuration supports sequential control across multiple circuits, while fusible protection provides coordinated fault management. For automated lines, this reduces safety risk and helps ensure machine guarding aligns with standard control schemes.
The device is UL Listed, a key certification for electrical safety and reliability in industrial panels. It also carries broad NEMA ratings—1, 3R, 4, and 12—supporting use in a range of environments and enclosures. Optional accessories like Ground Fault Relay and Blown Fuse Detection can further bolster regulatory compliance and protection coverage.
Though initial cost is higher than smaller switches, the CB1633B120480KAX5 reduces component count and installation time by consolidating switching, protection, and interlock functions. Its 1600A/480V rating suits high-demand lines, lowering downtime and spare parts expenditure. The UL/NEMA compliance minimizes regulatory risk, while optional features enable tailored protection, delivering favorable lifecycle costs and faster return on investment.