Eaton KDPV4350W PV Guard MCCB - 4-Pole, 1000V UL Listed
Part Number: KDPV4350W
Quick Summary
Eaton KDPV4350W PV Guard MCCB is a solar-ready overcurrent protection device for photovoltaic systems. Engineers often struggle with reliable protection under harsh ambient conditions, wiring complexity, and ensuring code compliance across PV environments. This unit carries CSA Certified and UL Listed certifications, and is calibrated for 50°C operation with 80% rated performance, underscoring its suitability for demanding solar applications. By combining a complete breaker with a robust 350 A, 1000 Vdc rating, it delivers consistent protection while enabling faster installation and simplified maintenance, supporting project timelines and total cost of ownership goals.
Product Information
Extended Description
KDPV4350W Eaton: Eaton PV Guard / Solar complete molded case circuit breaker, K-frame, KD, Complete breaker, Fixed thermal, fixed magnetic trip type, Four-pole, 350A, 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
KDPV4350W
UPC
786685883373
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
350 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
PVGard solar circuit breakers technical data sheet
PVGard solar circuit breakers technical data sheet
Feature → Business Impact → Application: The KDPV4350W is a four-pole, complete molded case breaker with a KD frame designed for photovoltaic protection up to 1000 Vdc, delivering 350 A with a 5 kAIC interrupt capacity. This translates to reliable fault interruption in PV strings and inverters, reducing arc energy risk and guarding upstream equipment in utility-scale and commercial sites. Application: PV array protection and inverter input protection in rooftop and ground-mounted installations. Feature → Business Impact → Application: Fixed thermal and fixed magnetic trip (T186) provide precise overload and short-circuit protection, minimizing nuisance trips and extending service intervals. This improves system availability for critical solar applications. Application: Central PV protection panels and PV booster circuits in commercial facilities. Feature → Business Impact → Application: 50°C calibration and 80% rated capability ensure dependable performance in hot climates and variable solar conditions, supporting steady energy generation. Application: Outdoor enclosures and exposed solar installations where ambient temperatures approach design limits. Feature → Business Impact → Application: Without terminals design simplifies panel wiring, reduces field terminal torque requirements, and speeds up installation. Application: OEM panel builds and retrofit projects where wiring efficiency matters. Feature → Business Impact → Application: Four-pole configuration provides robust isolation and balanced protection for three-phase PV systems, aiding compliance with electrical codes. Application: PV array multi-string protection and inverter link protection. Feature → Business Impact → Application: CSA Certified and UL Listed certifications de-risk procurement, streamline approvals, and support warranty validation. Application: Compliance-focused projects and utility-grade solar deployments.
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FAQs
The KDPV4350W is designed for photovoltaic protection and fits four-pole KD-frame panels. It supports complete breaker configurations for PVGuard systems, with a 12 in length, 8 in width, and 6.5 in height footprint, and can be mounted in standard electrical enclosures without terminals, simplifying wiring in PV arrays and inverter protection stations.
Key ratings include 350 A continuous current, 1000 Vdc voltage rating, 5 kAIC interrupt capability, four-pole configuration, KD frame, and T186 trip type. It is calibrated for 50°C ambient operation and 80% rated performance, making it suitable for PV system protection under hot-climate conditions.
Yes. The device is designed for photovoltaic applications with a 50°C calibration and 80% rated performance, allowing reliable operation in warm outdoor environments. CSA Certified and UL Listed certifications further support outdoor installations by meeting regulatory requirements and reducing field failure risk.
The product is CSA Certified and UL Listed, indicating compliance with North American safety and performance standards. These certifications streamline procurement, simplify regulatory approvals, and support warranty coverage while providing confidence in protective performance for PV systems.
The fixed thermal/magnetic trip reduces nuisance trips and delivers dependable protection, lowering unplanned downtime. Its compatible form factor, straightforward installation without terminals, and robust ratings contribute to faster commissioning, longer service life, and favorable total cost of ownership in commercial and utility-scale PV projects.