Eaton CB1633B120480K Pressure contact switch - UL Listed
Part Number: CB1633B120480K
Quick Summary
The Eaton CB1633B120480K pressure contact switch is designed to deliver reliable interlock and protection in high-current switchgear applications. Engineers often struggle with nuisance trips, ground faults, and downtime in 480V feeder systems, which can erode productivity and increase maintenance costs. UL Listed certification plus compatibility with NEMA 1, 3R, 4, and 12 enclosures provides robust installation flexibility across harsh environments. With a 1600A rating at 480V and a 120V control circuit, this device supports scalable protection while its bottom-feed fusible configuration simplifies field wiring and service. In practice, you gain improved safety, reduced downtime, and a lower total cost of ownership through dependable, industry-grade protection.
Product Information
Extended Description
CB1633B120480K Eaton: Eaton pringle bolted pressure contact switch,Interlock,1600A,120V,Bottom feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633B120480K
UPC
782116958443
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.
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
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB1633B120480K
Feature → Business Impact → Application: The CB1633B120480K delivers a 1600A amperage rating with a 480V system voltage and a 120V control circuit, enabling it to protect large switchgear feeders while accommodating common 480V industrial controls. This translates to measurable efficiency gains and predictable protection for critical loads in manufacturing plants and distribution centers. Feature → Application: Three-pole, bottom-feed, fusible configuration supports straightforward installation in existing panels, reducing wiring complexity and commissioning time. Feature → Application: Interlock with charge-before-close mechanism improves operator safety during maintenance, minimizing the risk of accidental energization in live enclosures. Feature → Application: Optional Ground Fault Relay, Blown Fuse Detection, and Single Phase Protection provide enhanced fault detection and safety compliance for critical systems. Feature → Application: Optional auxiliary contact provisions and Kirk provisions enable seamless integration with MCCs, PLCs, and alarm systems, boosting visibility and control. Feature → Application: NEMA 1, 3R, 4, 12 compatibility and UL Listed certification support regulatory compliance and versatile deployment in harsh environments, while the fusible protection improves system reliability. Feature → Application: Bottom feed and compact footprint facilitate retrofits and panel upgrades, delivering faster installation and reduced field labor costs. Feature → Application: Interchangeable components and replacement parts reduce maintenance complexity and extend service life in demanding industrial settings.
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FAQs
Install the CB1633B120480K in a compatible switchgear enclosure using the bottom-feed configuration to simplify wiring and minimize cabinet intrusion. Ensure the three-pole, three-wire arrangement aligns with your feeder and confirm the fusible protection is correctly positioned for protection coordination. Follow the UL Listed installer guidelines and Kirk/auxiliary provisions if auxiliary contacts are required for control systems.
The device is rated for 1600A amperage, with a 480V system voltage and a 120V control circuit. It supports NEMA 1, 3R, 4, and 12 enclosures and uses fusible protection. The product is UL Listed, which helps ensure regulatory compliance in many industrial environments and supports integration with high-current switchgear.
Yes. The CB1633B120480K features an interlock and a charge-before-close mechanism, which enhances operator safety by preventing energization during maintenance. This makes it well-suited for high-current switchgear and transformer feeder applications where safe, controlled operation is critical.
The switch is UL Listed and compatible with NEMA 1, 3R, 4, and 12 enclosures, enabling deployment across a range of indoor industrial environments. This certification and enclosure versatility help meet NEC/CSA compliance while supporting durable operation in demanding conditions.
Eaton backs this product under the company’s standard warranty policy: one year from the date of installation or eighteen months from shipment, whichever occurs first. This coverage helps mitigate maintenance costs and provides assurance during initial commissioning and in-field operation.