Eaton CB4033B120480GRA Bolted pressure switch - Fusible
Part Number: CB4033B120480GRA
Quick Summary
The Eaton CB4033B120480GRA bolted pressure switch provides reliable fault protection for industrial power distribution. Facilities struggle with nuisance trips, slow fault clearance, and maintenance challenges on legacy relays. Key certifications include UL Listed and rugged NEMA ratings 1, 3R, 4 and 12, supporting safe operation. Designed for low-voltage power distribution and motor control panels, it aligns with common Eaton switching devices and offers scalable protection options to reduce downtime and total cost of ownership.
Product Information
Extended Description
CB4033B120480GRA Eaton: Eaton pringle bolted pressure contact switch,Single-phase relay with capacitor trip device (SPVR), BFD with three on lights (does not trip),4000A,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB4033B120480GRA
UPC
782116950515
Product Length/Depth
22.5 in
Product Height
32 in
Product Width
40 in
Product Weight
430 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
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
4000A
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 three normally on lights (does not trip)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB4033B120480GRA
Feature: Three-pole bottom-feed configuration with fusible protection delivers high-current reliability. Business impact: reduces conductor heating and improves fault-clearance coordination, lowering the risk of cascading trips. Application: ideal for large panelboards and motor control centers in manufacturing and processing facilities. Feature: SPVR capacitor trip device provides precise protection timing in single-phase protection schemes. Business impact: minimizes nuisance trips by coordinating with control power transformers, reducing downtime and unplanned outages. Application: suitable for systems with capacitor banks and single-phase protection in low-voltage distributions. Feature: Optional ground fault relay and auxiliary provisions enable enhanced protection and diagnostics. Business impact: improves fault location, safety compliance, and maintenance planning. Application: critical facilities where ground fault detection and auxiliary signaling are required for alignment with safety standards. Feature: UL Listed certification and broad NEMA ratings (1, 3R, 4, 12) support versatile installation. Business impact: simplifies procurement, accelerates project timelines, and ensures regulatory compliance. Application: panel enclosures, washdown environments, and exposed or harsh installations in industrial settings. Feature: Bottom feed and three-wire design streamline wiring and field retrofit. Business impact: reduces installation time and potential wiring errors, improving overall project efficiency. Application: retrofit projects and new builds in low- to mid-voltage power distribution networks.
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FAQs
Installation should begin by verifying enclosure suitability for a three-pole, bottom-feed device and ensuring the panel is de-energized. Mount the switch securely, connect three main power conductors to the load side, and wire the control circuit to the 120 V control voltage. Tie in the ground and any optional auxiliary or ground fault wiring per the Eaton installation guidelines to ensure proper protection coordination and safety.
The CB4033B120480GRA provides fusible protection for high-current circuits, a three-pole protection scheme, and a ground fault option with control power transformer integration. It also features a single-phase SPVR with a capacitor trip device to support selective tripping and reduce nuisance outages, making it suitable for complex low-voltage power distribution scenarios.
Yes. This device is rated for a 480 V system with a 120 V control voltage, and its three-pole, bottom-feed configuration supports efficient integration into standard low-voltage switchgear and panelboards. Its fusible protection and NEMA-rated enclosure options help ensure dependable operation in typical industrial environments.
The CB4033B120480GRA is UL Listed and carries broad NEMA ratings including 1, 3R, 4, and 12. These certifications validate safe performance in a range of environments—from standard indoor panels to outdoor and washdown areas—facilitating regulatory compliance and streamlined procurement.
The device’s high-current rating, fault protection features, and SPVR with capacitor trip reduce unplanned outages and related downtime costs. Its durable enclosure and compatibility with existing Eaton switching devices can lower maintenance frequency and spare-part needs, delivering a favorable total cost of ownership over the equipment’s service life.