Eaton JGSDC3125FAM PV Guard Solar MCCB - UL Listed
Part Number: JGSDC3125FAM
Quick Summary
PV Guard solar circuit breaker from Eaton provides reliable DC protection for PV arrays and solar power systems. Engineers often struggle with mismatched ratings, installation complexity, and compliance risk when integrating PV protection into distributed solar assets. UL Listed, IEC Rated, and CSA Certified ensure cross-market safety and performance, while the 125 A rating and dual voltage capability support rooftop, commercial, and utility-scale configurations. This product consolidates protection and control in a single, field-installable unit, helping streamline procurement and reduce total cost of ownership. With compact form factor and metric mounting, it also accelerates installation in limited spaces.
Product Information
Extended Description
JGSDC3125FAM Eaton: Eaton Series G DC/PvGard complete molded case circuit breaker, JG-frame, JG, Three-pole, Fixed thermal, adj. magnetic trip, 125A, 600 Vac, 250 Vdc, 85 kAIC at 240 Vac, 40 kAIC at 415 Vac, 35 kAIC at 480 Vac, 18 kAIC at 600 Vac
Product Name
Eaton PV Guard / Solar complete molded case circuit breaker
Catalog Number
JGSDC3125FAM
UPC
786689167028
Product Length/Depth
3.57 in
Product Height
4.13 in
Product Width
4.13 in
Product Weight
6.5 lb
Certifications
UL Listed IEC Rated CSA Certified
Type
PV Guard and Solar
Amperage Rating
125 A
Voltage rating
600 Vac, 250 Vdc
Trip Type
T185
Circuit breaker type
JG
Circuit breaker frame type
Complete breaker
Terminals
Metric end caps
Frame
JG
Class
Vdc
Mounting hardware
Metric
Interrupt rating
85 kAIC at 240 Vac 18 kAIC at 600 Vac 40 kAIC at 415 Vac 35 kAIC at 480 Vac
Number of poles
Three-pole
Value of Circuit Breakers for PV Systems and Eaton PVGard Solar Circuit Breakers
Eaton Specification Sheet - JGSDC3125FAM
Feature → Business Impact → Application: The JG frame three-pole design provides robust DC protection for multi-string PV configurations, consolidating protection and control in a single device, reducing wiring complexity and panel footprint. This translates to faster installation, fewer field errors, and improved uptime in rooftop and commercial PV enclosures. Feature → Business Impact → Application: 125 A amperage with 600 Vac and 250 Vdc ratings delivers reliable overcurrent protection for inverter outputs, enabling consistent performance across diverse PV topologies and string configurations. Use in DC PV protection schemes to minimize nuisance trips and protect critical power paths. Feature → Business Impact → Application: The fixed thermal with adjustable magnetic trip (T185) delivers predictable response under surge and fault conditions, supporting safer maintenance and quicker fault isolation in utility-scale plants and distributed PV sites. Feature → Business Impact → Application: Certifications UL Listed, IEC Rated, CSA Certified ensure cross-border compliance, simplifying procurement and interconnection with utilities. The metric terminals and mounting hardware enable straightforward integration into standard switchgear and control panels. Feature → Business Impact → Application: The unit’s compact dimensions (3.57 in L x 4.13 in W x 4.13 in H) and 6.5 lb weight reduce space requirements and allow easy retrofits in crowded enclosures, improving overall project timelines and installation ergonomics. Feature → Business Impact → Application: Compatibility with PVGuard products and DOE/utility guidelines supports streamlined maintenance, spares provisioning, and long-term total cost of ownership improvements for both rooftop and utility-scale PV systems.
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FAQs
JGSDC3125FAM installs on a three-pole, JG frame with metric terminals and mounting hardware, simplifying field wiring and enclosure fit. Its compact dimensions and 6.5 lb weight support straightforward panel mounting in PV combiner boxes. Use with compatible DC conductors and verify torque per spec to prevent overheating or arcing, ensuring safe, reliable operation in dense switchgear environments.
Key specs include 125 A amperage rating, 600 Vac and 250 Vdc voltage ratings, and a fixed thermal with adjustable magnetic trip (T185). Interruption ratings are 85 kAIC at 240 Vac, 18 kAIC at 600 Vac, 40 kAIC at 415 Vac, and 35 kAIC at 480 Vac. Trip type and frame (T185, JG) provide predictable fault response for PV circuits.
Yes. The JGSDC3125FAM is designed for DC PV protection with a three-pole JG frame, suitable for rooftop, commercial, and utility-scale PV configurations. Its compact, metric-mount design eases installation in combiner boxes and switchgear. Verify system voltage, string topology, and inverter protection requirements to ensure optimal protection coordination and compliance with local codes.
The breaker is UL Listed, IEC Rated, and CSA Certified, supporting cross-market safety and performance. This combination helps meet NEC/CEC interconnection requirements and utility-approval processes, reducing certification hurdles during project deployment and enabling broader market access for PV installations.
The JGSDC3125FAM offers robust, maintenance-light DC protection with a long service life. By consolidating protection and control in a single unit, it reduces spare parts, simplifies training, and lowers total cost of ownership. Fast fault isolation improves uptime, reduces downtime costs, and supports safer, more reliable PV system operation.