Eaton JGHDC3175FAG PVGuard MCCB - UL 489, 3-pole
Part Number: JGHDC3175FAG
Quick Summary
Eaton PVGuard JGHDC3175FAG is a three-pole molded case circuit breaker for solar PV systems. Engineers often contend with crowded panels and nuisance trips during fault events; this device provides fixed thermal protection and adjustable magnetic trip to improve selectivity and reliability. UL 489 certification and robust safety compliance underpin dependable performance in demanding solar environments. Its rugged build, standard mounting hardware, and comprehensive data sheets support scalable protection, faster commissioning, and easier retrofit across growing PV installations. This combination translates to reduced downtime and lower total cost of ownership for industrial and commercial solar projects.
Product Information
Extended Description
JGHDC3175FAG Eaton: Series G JG-frame molded case circuit breaker, 175A, Three-pole, With terminals, Fixed thermal, adjustable magnetic, Cu wire, With collars, JGHDC type
Product Name
Eaton PV Guard / Solar complete molded case circuit breaker
Catalog Number
JGHDC3175FAG
UPC
786685494456
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
175 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
Mounting hardware
Metric
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 - JGHDC3175FAG
Eaton Specification Sheet - JGHDC3175FAG
Feature: 175 A amperage rating with a three-pole design delivers strong overcurrent protection for mid-sized PV distributions. Benefit: Enhanced protection and stable fault clearing reduce the risk of equipment damage and wildfire hazards in outdoor arrays. Application: Ideal for PV combiner boxes, main distribution centers, and inverter interfaces in commercial solar installations. Feature: 600 Vac / 250 Vdc voltage rating supports both AC distribution and DC PV circuits with a single MCCB. Benefit: Simplifies design while maintaining compliance and reducing component count. Application: Useful in hybrid electrical systems and mixed-voltage solar plants. Feature: Fixed thermal, adjustable magnetic trip (T185) enables precise selectivity and fast fault isolation. Benefit: Improves system uptime and protects critical loads. Application: Used where coordinated protection between PV strings and inverters is required. Feature: Line and load terminals with metric mounting hardware simplify installation and reduce wiring errors. Benefit: Faster field assembly, consistent torque, and reliable connections. Application: Suitable for standard enclosures and modular racks in solar DC/AC interfaces. Feature: Complete breaker frame JG with a compact form factor (3.57 in L, 4.13 in W/H) reduces panel footprint. Benefit: Higher packing density and easier retrofits. Application: Ideal for retrofit projects and space-constrained electrical rooms. Feature: UL 489 listed with Eaton warranty support provides peace of mind and long-term serviceability. Benefit: Clear compliance and predictable maintenance cycles. Application: Essential for compliance-heavy projects and long-term asset management.
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FAQs
For PV installations, ensure proper panel space and accommodate line and load terminals with metric mounting hardware. Verify enclosure compatibility for the 3-pole unit and confirm mounting orientation aligns with wiring practices. Use the catalog and datasheet references to follow torque guidelines and ensure consistent conductor sizing. The JGHDC3175FAG’s compact footprint supports dense layouts in combiner boxes and distribution panels, reducing field wiring complexity.
The device is rated at 175 A with a 3-pole configuration. It provides protection at 600 Vac and 250 Vdc, with a trip type T185. It is a JG frame MCCB with line and load terminals. This combination enables protection across AC distribution and DC PV circuits, supporting safe operation in solar installations while meeting UL 489 requirements.
Yes, it supports DC PV circuits within its 250 Vdc rating and 600 Vac capability for AC sections. The device offers fixed thermal protection and adjustable magnetic trip (T185) for precise coordination in PV systems, helping prevent overcurrent conditions from affecting inverters and string cabling. UL 489 listing further confirms compliance with recognized protection standards for MCCBs used in solar applications.
The JGHDC3175FAG carries UL 489 certification, which validates its suitability for molded case circuit protection in industrial and electrical distribution. This certification supports compliance with national and regional electrical codes and standards for solar installations, enabling safer design, easier approval processes, and reliable performance in harsh environments typical of outdoor PV sites.
Maintenance is typically minimal due to the solid-state protection and robust mechanical design. The 1 year warranty from Eaton (or 18 months from shipment, per policy) provides coverage during early life. ROI is driven by reduced nuisance tripping, improved uptime for inverters, and lower maintenance costs, especially in medium-sized PV deployments where reliable protection translates to fewer downtime events and faster commissioning.