Eaton MDLPV3350W PV Guard - 1000 Vdc UL Listed
Part Number: MDLPV3350W
Quick Summary
PV Guard MDLPV3350W is a complete molded case circuit breaker designed for PV DC protection in solar installations. Engineers often contend with nuisance trips and limited DC protection margins in PV systems under rapidly changing irradiance; this device provides fixed thermal and fixed magnetic trips to help maintain safety and system uptime. UL Listed certification ensures electrical safety compliance, the 1000 Vdc rating supports PV array protection, and the 80% rated specification aligns with partial-load operation in solar strings. In practice, this solution translates to faster procurement, safer DC protection, and reduced downtime across commercial and utility PV deployments. This positions engineering teams to meet evolving safety standards while optimizing equipment life-cycle costs.
Product Information
Extended Description
MDLPV3350W Eaton: Eaton Series C DC/PvGard complete molded case circuit breaker, MDL-frame, MDL, Complete breaker, Fixed thermal, fixed magnetic trip type, Three-pole, 350A, 1000 Vdc, 7.5 kAIC at 1000 Vdc, Without terminals, Photo voltaic, 80% rated
Product Name
Eaton PV Guard / Solar complete molded case circuit breaker
Catalog Number
MDLPV3350W
UPC
786685882833
Product Length/Depth
4.06 in
Product Height
8.25 in
Product Width
8.25 in
Product Weight
28.4 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
Amperage Rating
350 A
Voltage rating
1000 Vdc
Trip Type
T186
Circuit breaker type
MDL
Circuit breaker frame type
Complete breaker
Rating
80% rated
Terminals
Without terminals
Frame
MDL
Class
Photovoltaic
Interrupt rating
7.5 kAIC at 1000 Vdc
Number of poles
Three-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
350 A amperage rating and a 1000 Vdc maximum enable protection of large PV strings while reducing conductor clutter. This higher fault-current capability supports more compact DC protection schemes and lowers total installation costs for commercial and utility PV projects. It is well suited for PVGard configurations in rooftops and utility-scale arrays where space, reliability, and safety matter. Three-pole MDL frame with complete breaker construction delivers a 7.5 kAIC interrupt rating at 1000 Vdc. Fast fault clearance minimizes conductor heating and improves arc-flash risk management, boosting system uptime. Use in three-phase PV DC feeders, inverter connections, and combiner boxes, with no field-installed terminals, integrating with compatible busbar assemblies in PV switchgear. Fixed thermal and fixed magnetic trip type T186 provides predictable protection curves and harmonized coordination with upstream devices. This reduces nuisance trips during transient conditions caused by shading or rapid irradiance changes. Applications include DC protection for PV arrays and inverter connections across rooftop and ground-mount systems. 80% rated operation supports partial-load conditions typical of PV systems in cloudy weather, reducing heat generation and extending breaker life. The photovoltaic class designation aligns with PVGard products and helps ensure correct protection coordination with PV arrays. UL Listed certification further reinforces compliance with electrical codes and safe installation practices for 1000 Vdc PV circuits. Without terminals simplifies integration into prefabricated switchgear and busbar-based assemblies, delivering faster installation and fewer field connections. This compact MDL breaker suits retrofit projects and new builds where space is at a premium, while maintaining robust interrupt performance. Warranty terms follow Eaton policy: one year from installation or eighteen months from shipment, whichever occurs first, reducing risk for project timelines and procurement budgets.
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FAQs
MDLPV3350W is a three-pole MDL frame breaker supplied without terminals. For installation, mount the unit in compatible PV switchgear or busbar assemblies designed for MDL breakers and connect to the system via the host equipment terminals installed by the panel builder. Ensure the busbar arrangement and enclosure meet 1000 Vdc ratings and clearance requirements.
MDLPV3350W features a 7.5 kAIC interrupt rating at 1000 Vdc and a fixed trip type T186. It has a 350 A amperage rating and is designed for fixed thermal and fixed magnetic tripping, providing fast clearance and coordinated protection for PVDC circuits in solar installations.
Yes. The device is specifically engineered for PVGuard PV systems, with 1000 Vdc capability, 350 A rating, and three-pole protection. It aligns with PV arrays, inverters, and DC feeders, delivering reliable protection in rooftop and utility-scale configurations while meeting UL Listed safety requirements.
MDLPV3350W is UL Listed, confirming compliance with electrical safety standards for DC circuit protection. Its 1000 Vdc rating supports standard PV arrays, and it is designed for photovoltaic applications. These certifications help ensure regulatory compliance, safer installations, and streamlined procurement within solar projects.
Eaton offers a policy of one year from installation or eighteen months from shipment, whichever occurs first. This warranty supports procurement confidence and project timelines, with access to Eaton’s technical support and the PVGard product family documentation for ongoing maintenance and compatibility checks.