Eaton CB1233B120480GRAX5 Bolted Pressure Switch - UL Listed
Part Number: CB1233B120480GRAX5
Quick Summary
Eaton CB1233B120480GRAX5 bolted pressure switch protects heavy-duty electrical systems in industrial plants. Facility downtime and nuisance trips cost time and money, especially in critical power distributions. The UL Listed certification supports safety compliance, while the device’s NEMA-rated enclosure compatibility (NEMA 1, 3R, 4, 12) provides installation flexibility across harsh environments. With a 1200 A amperage rating, 480 V system voltage, and 120 V control voltage, this switch delivers robust protection for switchgear, motor control centers, and large distribution panels, helping engineers optimize uptime and safeguard critical loads. Its built-in SPVR capacitor trip device and fusible protection further reinforce reliability without sacrificing protection accuracy or responsiveness.
Product Information
Extended Description
CB1233B120480GRAX5 Eaton: Eaton pringle bolted pressure contact switch,Single-phase relay with capacitor trip device (SPVR), BFD with no lights (trips switch),1200A,1NO-1NC,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1233B120480GRAX5
UPC
782116956289
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
1200A
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
Single-phase voltage relay with capacitor trip device (SPVR), BFD with no lights (trips switch)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB1233B120480GRAX5
Feature: Three-pole, 1 NO-1 NC contact configuration with bottom feed. Business Impact: Simplified wiring and robust control integration reduce installation time and potential misconfigurations. Application: Ideal for three-phase power distribution panels in industrial facilities. Feature: Ground fault protection option with control power transformer. Business Impact: Enhanced safety and fault isolation lowering risk of electric shock and equipment damage. Application: Main power feeders and critical loads where ground fault events must be detected quickly. Feature: SPVR with capacitor trip device and ‘fuseable’ protection. Business Impact: Faster, predictable trips for single-phase protection while maintaining selectivity and downstream protection. Application: Systems requiring reliable tripping and downstream fuse coordination. Feature: NEMA-rated enclosure compatibility and UL Listed safety. Business Impact: Easier compliance, broader installation options, and reduced risk of failed safety conformance. Application: Harsh industrial environments, switchgear assemblies, and control panels. Feature: Bottom feed and three-wire configuration with bottom fuse arrangement. Business Impact: Streamlined wiring paths and easier maintenance, lowering installation and retrofit costs. Application: Retrofit projects and new builds requiring straightforward trenching and wiring access.
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FAQs
This switch is designed for bottom feed, three-wire configurations and supports 1 NO-1 NC contact arrangement. Its dimensions and enclosure compatibility align with standard switchgear footprints, making it suitable for retrofits in MCCs and distribution panels. For best results, verify bus clearance, conductor sizing for 1200 A ratings, and compatibility with optional ground fault relay provisions and auxiliary contacts prior to installation.
The CB1233B120480GRAX5 uses an electrical trip with a charge-before-close mechanism and includes a single-phase voltage relay with capacitor trip device (SPVR). SPVR enables rapid, reliable tripping in response to phase faults or abnormal conditions, while the capacitor-based trip provides a predictable, well-timed opening sequence. This combination minimizes arcing and protects downstream equipment from damage.
Yes. With UL Listed certification and NEMA ratings of 1, 3R, 4, 12, the switch is designed for diverse industrial environments, including chemical plants, oil & gas facilities, and heavy manufacturing. Its 480 V system voltage and 1200 A capacity support demanding power distribution, while bottom feed and fuse configurations simplify installation in compact or crowded switchgear rooms.
Regular preventive maintenance should include functional tests of the trip circuits, especially after any fault events or electrical work. If ground fault relay options are installed, perform insulation resistance checks and verify transformer integrity. Check enclosure integrity, observe for any signs of overheating, and confirm that auxiliary contacts operate within specified tolerances during routine exercising.
By providing reliable trip protection for 480 V systems, reducing nuisance trips, and enabling faster fault clearance, this switch helps lower unplanned downtime and maintenance costs. The simple bottom-feed installation reduces commissioning time, while UL Listed certification supports compliance and decreases risk of non-conformance audits, delivering tangible improvements in reliability and total cost of ownership for switchgear assemblies.