Eaton CB1633B120480K7 Pringle Bolted Pressure Switch - UL
Part Number: CB1633B120480K7
Quick Summary
Eaton CB1633B120480K7 is a bolted pressure contact switch used in high-current motor control and interlock applications. This design helps prevent nuisance trips and improves safety in rugged enclosures. It is UL Listed and compatible with NEMA 1, 3R, 4 and 12 enclosures to meet harsh industrial environments. Designed for 480 V system voltage with a 120 V control circuit, it supports scalable, reliable motor protection across process lines. For procurement teams, this combination reduces spares, simplifies compliance, and drives plant uptime through a proven, industry-grade solution.
Product Information
Extended Description
CB1633B120480K7 Eaton: Eaton pringle bolted pressure contact switch,Interlock,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
CB1633B120480K7
UPC
782116958429
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
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 - CB1633B120480K7
Feature → Business Impact → Application: The CB1633B120480K7 provides 1600A amperage with a 2NO-2NC contact configuration, enabling reliable, safe switching for heavy‑duty motors and interlock control in high‑current environments. This reduces nuisance trips and improves protection of personnel and equipment in process lines, making it ideal for motor control centers and switchgear assemblies in mining, metals, and industrial facilities. Feature → Business Impact → Application: The bottom feed arrangement and bottom fuse configuration simplify wiring and reduce panel footprint, accelerating installation time and lowering enclosure costs. Combined with a three‑pole, 3‑wire design and fusible protection, it delivers predictable protection for 480 V systems while maintaining straightforward maintenance access in new builds and retrofits. Feature → Business Impact → Application: UL Listed certification and compatibility with NEMA 1, 3R, 4, and 12 enclosures meet rigorous safety and environmental requirements, supporting code compliance and safer operation. The interlock capability, charge‑before‑close mechanism, and optional ground fault relay or auxiliary provisions address common reliability concerns in factory automation and process control. Feature → Business Impact → Application: The unit’s substantial dimensions and weight reflect a rugged, industrial‑grade switch that supports long service life in demanding installations, with a one‑year warranty (and Eaton policy 25‑000) helping to minimize total cost of ownership. This translates to lower maintenance intervals, reduced spare parts inventory, and improved asset ROI for plant operators.
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FAQs
CB1633B120480K7 is designed for bottom-feed installations with a bottom-fuse configuration, so plan for bottom-entry wiring and adequate clearance for its three-pole, 1600A contacts. Wire the 3-wire, 480V power alongside the 120V control circuit at the rated terminals, and ensure mounting supports the interlock and the unit’s footprint (16 in L x 24 in W x 32 in H).
Yes. The switch supports 480V system voltage in a three-pole, 2NO-2NC configuration with fusible protection. UL Listed and compatible with NEMA 1, 3R, 4, and 12 enclosures, it is well suited for demanding motor protection, switchgear, and process-control environments. Ensure proper sizing and coordination with upstream protective relays and feeders.
Available options include Optional Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, Kirk Provisions, Auxiliary Contact Provisions, and more. These features enable enhanced fault detection, safer single‑phase protection, expanded control wiring for automation sequences, and remote signaling to improve plant safety and operator visibility.
The CB1633B120480K7 is UL Listed, confirming safety compliance for electrical equipment. It is compatible with NEMA 1, 3R, 4, and 12 enclosures, allowing reliable operation in dusty, wet, and harsh industrial environments. The interlock and charge-before-close features further support safe operation in automated lines and switchgear.
The product carries a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This reduces maintenance risk and contributes to lower total cost of ownership by shrinking downtime and spare parts needs. Coupled with Eaton’s established reliability, the switch offers strong ROI for capital projects and ongoing plant operations.