Eaton CB1633B120480A9CT5 Pringle pressure switch UL-listed
Part Number: CB1633B120480A9CT5
Quick Summary
Eaton pringle bolted pressure switch enables automatic trip-and-close control for industrial power distribution panels. Engineers often battle nuisance trips, slow fault detection, and complex wiring in high-current, bottom-fed installations. UL Listed with NEMA 1, 3R, 4 and 12 compatibility ensures rugged protection across demanding environments. The 1600 A amperage rating and three-pole configuration support scalable power distribution while maintaining fast response and reliable control. This combination reduces downtime, simplifies safety compliance, and lowers maintenance costs across factory floors while enabling straightforward integration with control power transformers and auxiliary provisions. In practice, specifiers value bottom-feed, fusible protection, and 480 V system compatibility for compact, safe panel designs.
Product Information
Extended Description
CB1633B120480A9CT5 Eaton: Eaton pringle bolted pressure contact switch,BFD with three on 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
CB1633B120480A9CT5
UPC
782116898732
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
BFD with three normally on lights (trips switch), with control power transformer
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB1633B120480A9CT5
Feature: Three-pole 1 NO-1 NC contact configuration. Benefit: Enables precise control and fast protection for motor loads, reducing startup surge risk and improving electrical reliability in high-current panels. Application: Suitable for three-phase distribution in industrial automation where dependable fault isolation is critical. Feature: Bottom feed and fusible protection. Benefit: Simplifies wiring and protection coordination in compact switchgear, cutting installation time and safeguarding equipment from faults. Application: Ideal for space-constrained control cabinets serving 480 V systems. Feature: 1600 A amperage rating with 480 V system voltage. Benefit: Supports heavy-duty, high-current applications with robust fault protection and minimal voltage drop, boosting overall line efficiency. Application: Main feeders and large motor circuits in manufacturing lines. Feature: 1 NO-1 NC contacts and three-wire configuration. Benefit: Flexible control logic for start/stop interlocks and safe trip sequencing, improving reliability in push-button and automation sequences. Application: Control panels requiring both normally open and normally closed monitoring. Feature: Optional Ground Fault Relay and auxiliary provisions. Benefit: Enhances safety compliance and fault diagnostics, lowering risk of ground faults and enabling expanded control schemes. Application: Industrial safety interlocks and process protection in harsh environments. Feature: UL Listed and wide NEMA compatibility (1, 3R, 4, 12). Benefit: Simplifies regulatory approval and installation in diverse environments, from dusty plants to outdoor enclosures. Application: Systems subject to code compliance and rugged outdoor or damp locations. Feature: Charge-before-close mechanism. Benefit: Improves motor protection and reduces electrical stress during switching, extending equipment life. Application: High-reliability applications where sequencing matters for machine safety.
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FAQs
The CB1633B120480A9CT5 features a three-pole design with 1 NO-1 NC contacts and a bottom feed configuration. Wire the three phase inputs to the 3 wires, connect the load to the corresponding contacts, and include the fusible protection as per system voltage (480 V) and current (1600 A). The unit supports a control voltage of 120 V and can be paired with auxiliary contacts and optional ground fault protection for enhanced safety.
Key specifications include a 1600 A amperage rating, 480 V system voltage, and a fusible protection scheme, designed for reliability in demanding environments. The three-pole, 1 NO-1 NC configuration supports robust control logic, while the charge-before-close mechanism helps protect equipment during switching. UL Listing and NEMA compatibility further ensure performance under real-world industrial conditions.
This switch excels in motor control centers, large power distribution panels, and safety interlock applications in manufacturing and process industries. Its bottom-feed design and three-wire configuration simplify installation in cramped enclosures, while the 480 V rating and rugged NEMA compatibility support use in facilities with demanding environmental conditions and stringent safety requirements.
The CB1633B120480A9CT5 is UL Listed and compatible with NEMA 1, 3R, 4, and 12 enclosures, reflecting strong safety and environmental resilience. Such certifications help ensure regulatory alignment for industrial installations, simplify commissioning, and support long-term reliability in diverse plant environments.
By delivering fast fault detection, robust protection (fusible), and a reliable trip-before-close sequence, the switch minimizes unplanned downtime. Optional features like ground fault relay and auxiliary contacts enable proactive diagnostics and safer operation, reducing maintenance labor and extending the service life of downstream motor and switchgear components, which translates to measurable lifecycle cost savings.