Eaton P3BKD3125 Pow-R-Way III Plug-in Circuit Breaker UL 857
Part Number: P3BKD3125
Quick Summary
P3BKD3125 is a power-distribution circuit breaker plug-in unit for busway systems. It addresses install-time bottlenecks and inconsistent protection by delivering a plug-and-play solution with precise current ratings and coordinated trip curves. Certified to UL 857, ANSI/IEEE and CSA standards, and compliant with NEMA guidelines, it ensures safety, reliability, and regulatory alignment. Designed for the Pow-R-Way III family, it simplifies installation, reduces wiring complexity, and supports scalable busway distribution. In practice, engineers value the combination of robust interrupt ratings and a compact three-pole footprint that fits standard K-frame assemblies.
Product Information
Extended Description
P3BKD3125 Eaton: Eaton Pow-R-Way III circuit breaker plug-in unit, Busway, Three-pole, KD, Plug, Breaker, K Frame (70-400 A), 125A, 65 kAIC at 240 Vac, 35 kAIC at 480 Vac, 25 kAIC at 600 Vac, None, 50% Integral/Housing Ground
Product Name
Eaton Pow-R-Way III circuit breaker plug-in unit
Catalog Number
P3BKD3125
UPC
786683000512
Product Length/Depth
13.29 in
Product Height
34.41 in
Product Width
7.79 in
Product Weight
53 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.
Compliances
NEMA Compliant
Certifications
UL 857 ANSI IEEE Certified CSA Certified
Circuit Breaker Frame
K
Design
Pow-R-Way III
Grounding Options
50% Integral/Housing
Number Of Poles
Three-pole
Type
Breaker
Amperage Rating
125A
Interrupt rating
65 kAIC at 240 Vac, 35 kAIC at 480 Vac, 25 kAIC at 600 Vac
Application
Busway
Product Category
Plug
Feature → Business Impact → Application: The P3BKD3125 is a three-pole, KD plug-in unit with a K-frame design that integrates into Pow-R-Way III busway assemblies, reducing installation time and wiring errors while delivering dependable protection for critical loads in industrial facilities. This translates to measurable efficiency gains during panel builds and easier maintenance, as technicians can substitute plug-in breakers without busway disassembly. Application: ideal for medium- to high-current distributions in manufacturing lines and process facilities, where rapid deployment and reliable protection are essential. Feature → Business Impact → Application: With a 125A amperage rating and precise interrupt ratings (65 kAIC at 240 VAC, 35 kAIC at 480 VAC, 25 kAIC at 600 VAC), it provides robust fault tolerance that minimizes downtime and protects equipment from short-circuit events. Application: suitable for busway-fed power distribution in large enclosures and switchgear rooms. Feature → Business Impact → Application: Grounding options at 50% integral/housing simplify installation and improve fault path reliability, reducing bonding complexity and associated labor costs. Application: supports compliant, code-ready installations in new builds and retrofit projects. Feature → Business Impact → Application: UL 857, ANSI, IEEE, and CSA certifications, along with NEMA compliance, deliver confidence for code compliance audits and system validation. Application: preferred choice for regulated environments requiring traceable certification across industrial facilities. This combination of ratings, grounding flexibility, and standard compliance helps prevent scope creep in procurement and aligns with OEMs’ standardization programs. Feature → Business Impact → Application: The three-pole, plug-in format minimizes space and eases future upgrades, enabling scalable busway distribution as load profiles evolve. Application: supports phased capacity upgrades in data centers, food and beverage plants, and automotive manufacturing lines.
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FAQs
P3BKD3125 is designed as a three-pole KD plug-in unit within the Pow-R-Way III family and fits standard K-frame busway configurations. When planning installation, confirm the busway rating matches 240/480/600 V service, ensure 125A capacity, and verify grounding options (50% integral/housing). This compatibility minimizes field modification and accelerates commissioning while maintaining code compliance.
The P3BKD3125 provides 65 kAIC at 240 VAC, 35 kAIC at 480 VAC, and 25 kAIC at 600 VAC. These ratings define the maximum fault current each configuration can interrupt safely, guiding coordination with upstream protective devices and ensuring reliable system protection across the intended voltage range.
Yes. With its 125A rating, three-pole design, and busway compatibility, the unit is well-suited for data center and manufacturing environments where modular busway distribution, fast replacements, and dependable fault protection are critical. Its compact footprint and plug-in format help minimize enclosure space while maintaining robust protection for sensitive loads.
P3BKD3125 carries UL 857, ANSI, IEEE, and CSA certifications and is NEMA compliant. These markings confirm adherence to recognized safety and performance standards, simplify compliance reporting, and support installation in regulated facilities and OEM-coordinated projects.
The product is covered by Eaton’s warranty policy: one year from installation or eighteen months from shipment, whichever comes first. Its plug-in design facilitates quick replacements, reducing maintenance downtime and lifecycle costs. Access to Eaton specification sheets and the busway solution video further supports installation planning and ongoing servicing.