Eaton CB1633B120480KGR56 - Pringle bolted switch UL Listed
Part Number: CB1633B120480KGR56
Quick Summary
The Eaton pringle bolted pressure contact switch is engineered for high-current motor control and power distribution in demanding industrial environments. Operators often struggle with nuisance trips and incomplete protection, but this device delivers robust single-phase protection and optional ground fault detection to reduce downtime. UL Listed certification and broad NEMA ratings—NEMA 1, 3R, 4, 12—support reliable operation across indoor and rugged industrial enclosures. Coupled with a 1600 A rating at 480 V and a 120 V control circuit, it integrates with modern switchgear, delivering safer, more reliable automation and a lower total cost of ownership.
Product Information
Extended Description
CB1633B120480KGR56 Eaton: Eaton pringle bolted pressure contact switch,Interlock, Single-phase relay with capacitor trip device (SPVR), handle suitable for 6'6" requirements,1600A,1NO-1NC,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633B120480KGR56
UPC
782116958306
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
Ground fault with control power transformer
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, Single-phase voltage relay with capacitor trip device (SPVR), handle suitable for 6'6" requirements
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB1633B120480KGR56
High-current, three-pole design enables robust motor protection and power distribution, reducing the risk of overheating and unplanned downtime; this translates to increased equipment uptime and lower maintenance costs in heavy-industrial environments. Bottom-feed configuration and fusible protection streamline wiring and enhance enclosure integrity, allowing faster installation and simpler compliance with enclosure standards. Interlock features, auxiliary contact provisions, and the optional ground fault relay/ SPVR capacitor trip device deliver layered protection, improving personnel safety and reducing nuisance trips that disrupt production. The pringle bolted pressure contact mechanism supports quick maintenance and reliable contact performance under demanding loads, while the 6'6" handle option simplifies operator access and control in tall, crowded switchgear installations. Together, these elements optimize installation efficiency, regulatory compliance, and total cost of ownership for industrial automation projects.
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FAQs
When installing CB1633B120480KGR56 in a bottom-feed configuration, ensure proper wiring access from the bottom, adequate clearance for three-wire connections, and compatibility with the enclosure. Note the product dimensions (16 in depth, 32 in height, 24 in width) and a weight around 200 lb for mounting planning. Verify mounting hardware and interlock options are consistent with system requirements and safety standards. Bottom-feed designs can simplify wiring routes and improve serviceability in crowded switchgear layouts.
Key ratings include an amperage rating of 1600 A, system voltage of 480 V, voltage maximum and rating of 480 V, and a 120 V control voltage. The device is a three-pole, three-wire, fusible switch with 1 NO-1 NC contacts. These specifications drive bus sizing, protection coordination, and control circuitry design, ensuring safe, reliable operation in high-current circuits while supporting compliant shutdown and fault protection strategies.
Yes. Catalog notes indicate optional Ground Fault Relay and Single Phase Protection with a capacitor trip device (SPVR) are AVAILABLE. The unit also supports interlock and auxiliary contact provisions. This enables enhanced protection for single-phase faults and improved fault detection, aiding compliance with protection requirements in motor control and switchgear applications while reducing nuisance trips.
The switch is UL Listed and offers broad NEMA compatibility: NEMA 1, NEMA 3R, NEMA 4, and NEMA 12. This makes it suitable for indoor industrial panels as well as outdoor or harsh environments within protected enclosures. The bottom-feed design and rugged construction support reliability in factory floors, process areas, and energy distribution applications, provided enclosure ratings align with the specified NEMA configurations.
Upgrading to the CB1633B120480KGR56 delivers measurable ROI through increased uptime, reduced nuisance trips, and improved safety. The 1600 A rating at 480 V supports larger loads with coordinated protection, while optional SPVR and ground fault features minimize fault-related outages. Combined with easier installation (bottom feed and interlock options), maintenance costs decrease, leading to lower total cost of ownership over the equipment lifecycle.