Eaton CB1633T120480K76 Pringle bolted switch - UL Listed

Part Number: CB1633T120480K76
Manufacturer
Eaton
Part number
CB1633T120480K76

Quick Summary

Eaton CB1633T120480K76 is a bolted pressure contact switch used in heavy-duty motor control and safety interlock applications. Maintenance teams often struggle with mismatched devices that trigger nuisance trips or downtime; this unit’s 1600A rating and 120/480V capability align with high-demand panels and simplify procurement. UL Listed certification ensures safety and code compliance, while enclosure ratings cover NEMA 1, 3R, 4 and 12 to tolerate dusty, damp, or washdown environments. The interlock and charge-before-close mechanism supports safe, controlled startups, and the 2NO-2NC contact configuration provides flexible control options for complex machines. For procurement teams, rugged construction, warranty terms, and compatibility with optional features translate to lower lifecycle costs and faster, safer installations.

Product Information

Extended Description

CB1633T120480K76 Eaton: Eaton pringle bolted pressure contact switch,Interlock, handle suitable for 6'6" requirements,1600A,2NO-2NC,120V,Top feed,No ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633T120480K76
UPC
782116956876
Product Length/Depth
16 in
Product Height
28 in
Product Width
24 in
Product Weight
180 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
Top
Fuse configuration
Top 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, handle suitable for 6'6" requirements
High-current capacity and flexible contact configuration. This CB1633T120480K76 provides 1600A with a 2NO-2NC arrangement across three poles, enabling direct switching of large motor loads while reducing the number of components and wiring complexity. The business impact is fewer possible fault points and lower install-time costs. In practical terms, it’s ideal for heavy-duty motor control centers, large starters, and power distribution panels where reliability and response time are critical. Top-feed fuse configuration and rugged enclosure. The top feed design simplifies wiring runs and reduces contamination exposure on the fusible path, improving long-term reliability in harsh plants. With NEMA-rated protection (1, 3R, 4, 12), the switch performs in dusty, damp, or washdown environments, supporting retrofit projects and new builds alike. Interlock, charge-before-close and optional protective features. Interlocks and a charge-before-close mechanism improve operator safety by ensuring or delaying closing until conditions are correct. Catalog notes include optional Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, Kirk Provisions, and Auxiliary Contacts, giving engineers a path to meet strict safety and protection requirements without changing core hardware. Compatibility and maintenance benefits. With UL Listing and standard 120V control voltage alongside 480V system voltage, the device integrates with common industrial controls and voltage transformers. The solid construction and warranty terms—one year from installation or 18 months from shipment—help reduce total cost of ownership and improve uptime, while the ability to run with other Eaton switching devices simplifies spare-part strategies in plant-wide automation.

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FAQs

The CB1633T120480K76 uses a top-feed configuration designed to streamline wiring runs in new installations or retrofits. Ensure clearance for the three-pole enclosure, connect the three wires to the appropriate terminals, and verify 1600A current capacity is compatible with the panel rating. Use proper torque on connections and follow electrical code requirements for safe operation.
This switch is rated for 1600A and 480V system voltage, with a 120V control voltage. It provides 2NO-2NC contacts across three poles, suitable for switching large motor loads and complex control circuits in switchgear and motor-control centers. The fusible protection option adds an additional protection layer for fail-safe operation.
Yes. Catalog notes indicate optional Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, Kirk Provisions, and Auxiliary Contact Provisions are AVAILABLE. These features allow enhanced protection, easier integration into safety interlocks, and expanded control logic without replacing the core switch hardware.
The switch supports NEMA ratings including 1, 3R, 4, and 12, making it suitable for dust-prone, damp, washdown, and rugged industrial environments. It is well-suited for heavy-duty panel applications, switchgear, and motor-control centers in manufacturing facilities where durability and reliable protection are required.
The product is covered by Eaton’s warranty policy, providing one year from installation or eighteen months from shipment, whichever occurs first. This warranty supports ongoing maintenance planning and reduces risk for plant operators, with access to Eaton support for spare parts and technical guidance.