Eaton JGHDC3100FAW PVGuard MCCB - UL 489 Certification
Part Number: JGHDC3125FAG
Quick Summary
PV Guard JGHDC3100FAW is a complete molded case circuit breaker designed for solar PV protection in utility and commercial installations. Engineers often face nuisance trips and protection coordination challenges between PV inverters and protection devices; this model addresses those by combining fixed thermal with adjustable magnetic trip. UL 489 certification underpins safe, code-compliant protection, while the PVGuard branding signals suitability for solar applications. In practice, you gain improved selectivity, fast fault clearance, and a compact, plug-and-play solution that integrates with standard switchgear and PV combiner boxes. This reduces commissioning time, lowers maintenance costs, and improves system reliability for grid-tied PV setups.
Product Information
Extended Description
JGHDC3125FAG Eaton: Eaton Series G DC/PvGard complete molded case circuit breaker, JG-frame, JG, Complete breaker, Fixed thermal, adjustable magnetic trip type, Three-pole, 125A, 600 Vac, 250 Vdc, Line and load, Vdc
Product Name
Eaton PV Guard / Solar complete molded case circuit breaker
Catalog Number
JGHDC3125FAG
UPC
786685494432
Product Length/Depth
3.57 in
Product Height
4.13 in
Product Width
4.13 in
Product Weight
6.5 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
UL 489
Amperage Rating
125 A
Voltage rating
600 Vac, 250 Vdc
Trip Type
T185
Circuit breaker type
JG
Circuit breaker frame type
Complete breaker
Terminals
Line and load
Frame
JG
Class
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
Eaton Specification Sheet - JGHDC3125FAG
Eaton Specification Sheet - JGHDC3125FAG
Feature: 3-pole, 100 A rating provides reliable three-phase protection for PV inverters and DC links. Business impact: protects equipment and reduces downtime by rapid fault clearing; Application: commercial and utility-scale PV systems. Feature: 600 Vac / 250 Vdc voltage rating supports mixed AC/DC protection in hybrid PV architectures, enabling a single breaker to protect both inverter DC string circuits and AC distribution. Feature: T185 trip type with fixed thermal and adjustable magnetic trip enables selective coordination and adjustable fault response, reducing nuisance trips and improving reliability. Feature: UL 489 certified and Series G JG frame, with a compact, dashed dimension footprint; Benefit: easy drop-in replacement in existing assemblies and simplified procurement. Feature: Interrupt ratings up to 100 kAIC at 240 Vac / 65 kAIC at 480 Vac / 25 kAIC at 600 Vac provide robust fault withstand for high-current PV buses; Application: utility-scale or commercial PV plants. Feature: Without terminals offers installation flexibility in field-adjusted configurations, while compatibility with PVGuard products ensures streamlined integration with Eaton protective devices; Benefit: faster installation and reduced part numbers.
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FAQs
The JGHDC3100FAW is designed for standard Eaton JG frame switchgear and PV-ready assemblies, including solar combiner boxes and panelboards. It is a three-pole device rated for 600 Vac and 250 Vdc, intended for both AC distribution and DC protection in PV systems. The unit ships without terminals, enabling flexible field wiring with external terminals or bus-bar connections and easy integration into existing protection schemes.
T185 combines fixed thermal protection with adjustable magnetic trip, enabling selective coordination in PV arrays. This results in faster fault interruption during short-circuit events while minimizing nuisance trips from inverter transients. The outcome is improved system reliability and smoother inverter operation, which is critical for uptime in solar installations.
Yes. The JGHDC3100FAW is rated for 600 Vac and 250 Vdc, supporting protection for both AC distribution and DC string circuits within the same device. With a 100 A rating and robust interrupt capability, it is well-suited for commercial and utility-scale PV protection, including grid-tied configurations and hybrid architectures.
The breaker carries UL 489 certification, confirming conformance to standard requirements for molded case circuit breakers in industrial and PV applications. This certification supports code compliance, safe installation practices, and easier supplier qualification for solar projects, helping teams meet regulatory expectations and procurement standards.
PVGuard devices deliver reliable protection with minimized nuisance trips, reducing maintenance needs and service calls. The high interrupt ratings protect critical PV buses, while the compact form factor simplifies installation and reduces wiring costs. These factors contribute to higher system availability and a lower total cost of ownership over the project lifecycle.