Eaton KDPV4125W PV Guard Solar MCCB - 1000 Vdc, UL Listed
Part Number: KDPV4125W
Quick Summary
Eaton KDPV4125W PV Guard Solar MCCB is a complete molded case circuit breaker designed for PV power systems. Engineers often struggle to find a PV-rated breaker that tolerates high string voltages and hot environments without sacrificing safety. CSA Certified and UL Listed provide essential solar-specific safety and reliability, ensuring compliance with key industry standards. This KD-frame, four-pole breaker is 125 A, 1000 Vdc, and 5 kAIC, offering dependable protection in commercial and utility-scale installations, while 50°C calibration and 80% rated performance support dependable operation in demanding conditions. For installers and OEMs, the combination of rugged protection, documented compatibility, and accessible technical resources translates into faster commissioning and lower lifecycle costs for solar-ready electrical protection.
Product Information
Extended Description
KDPV4125W Eaton: Eaton PV Guard / Solar complete molded case circuit breaker, K-frame, KD, Complete breaker, Fixed thermal, fixed magnetic trip type, Four-pole, 125A, 1000 Vdc, 5 kAIC, Without terminals, Photo voltaic, 50°C, 80% rated
Product Name
Eaton PV Guard / Solar complete molded case circuit breaker
Catalog Number
KDPV4125W
UPC
786685883304
Product Length/Depth
12 in
Product Height
6.5 in
Product Width
8 in
Product Weight
14.5 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
CSA Certified UL Listed
Amperage Rating
125 A
Voltage rating
1000 Vdc
Trip Type
T186
Circuit breaker type
KD
Circuit breaker frame type
Complete breaker
Rating
80% rated
Terminals
Without terminals
Frame
K
Class
Photovoltaic
Calibration
50°C
Interrupt rating
5 kAIC
Number of poles
Four-pole
PVGard solar circuit breakers product aid
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
Value of Circuit Breakers for PV Systems and Eaton PVGard Solar Circuit Breakers
Eaton Specification Sheet - KDPV4125W
Eaton Specification Sheet - KDPV4125W
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: The KDPV4125W is a four-pole, 125 A, 1000 Vdc molded case circuit breaker designed for photovoltaic systems, delivering robust PV protection and reliable fault clearing, reducing downtime in solar arrays and inverters. This translates to safer, more compliant solar installations and lower maintenance costs in rooftop and ground-mounted projects. Feature → Business Impact → Application: KD frame with complete breaker construction enables straightforward mounting in standard electrical enclosures, streamlining installation and serviceability in PV combiner boxes and switchgear while reducing labor time. Feature → Business Impact → Application: Fixed thermal magnetic trip (T186) delivers fast, predictable protection for overcurrent events, supporting NEC-compliant protection schemes in high-energy PV environments and minimizing equipment damage. Feature → Business Impact → Application: 5 kAIC interrupt rating provides strong short-circuit protection for distributed PV networks, improving system reliability and confidence in utility-scale and commercial installations. Feature → Business Impact → Application: 50°C calibration and 80% rated performance ensure stable operation in elevated ambient temperatures common in solar sites, improving consistency in performance and reducing nuisance trips in hot climates. Feature → Business Impact → Application: CSA Certified and UL Listed certifications, together with PV-specific product documentation and datasheets, simplify procurement, compliance planning, and integration with Eaton PVGuard product family for end-to-end protection.
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FAQs
The KDPV4125W is designed for photovoltaic applications, including PV arrays, inverters, and PV combiner boxes. Its four-pole KD frame, 125 A rating, and 1000 Vdc capability make it ideal for both rooftop and utility-scale solar installations. It supports reliable PV protection with a fixed magnetic trip and is ready for use in standard electrical enclosures.
A 5 kAIC interrupt rating means the breaker can safely interrupt high-energy fault currents typical in PV systems, reducing the risk of arc faults and equipment damage. This improves system reliability, minimizes downtime, and helps meet NEC requirements for solar overcurrent protection in commercial and utility-scale projects.
Yes. The KDPV4125W is specified as without terminals, which simplifies mounting in compatible solar enclosures and reduces the need for terminal kits. This can streamline installation in MDF/Power Center configurations and PV protection cabinets, while maintaining secure, code-compliant connections.
Yes. The KDPV4125W is CSA Certified and UL Listed, ensuring compliance with safety and performance standards for solar electrical protection. These certifications support installation approval, regulator acceptance, and reliable operation in PV systems across various markets.
The product is covered under Eaton’s policy (1 year from installation or 18 months from shipment, whichever occurs first). Comprehensive support includes official datasheets, product aids, and specification sheets to assist with design, procurement, and commissioning in PV protection applications.