531X111PSHAJG3 | GE Factory Tested & ISO Certified

Description

Product Introduction

The 531X111PSHAJG3 is the ultimate evolution of GE’s 1500W Mark V power supply. It’s the last and most refined version of this platform—offering the same brute-force capacity as the JG2, but with improved thermal management, a redesigned input stage, and a modular fan assembly that simplifies field maintenance. This is the supply you install when you want the highest reliability in the most demanding Mark V rack configurations.

Compared to the 531X111PSHAJG2, the “G3” revision brings a handful of targeted improvements: the input filter was redesigned to reduce conducted emissions, the fan assembly is now a fully modular drop-in cartridge (no individual fan replacement required), and the hold-up time was extended from 80ms to 90ms. The terminal assignment is identical—direct drop-in. No firmware changes required.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

Q: What’s the main improvement in the JG3 over the JG2?
The JG3 has a redesigned modular fan cartridge—you replace the entire fan assembly as a single unit, rather than individual fans. This simplifies field maintenance (no need to source specific fan models) and ensures both fans are always matched. The hold-up time was extended to 90ms (vs. 80ms), giving your UPS an extra 10ms to transfer. The inrush current was reduced from 38A to 36A, placing less stress on upstream breakers. The input filter was also redesigned to reduce conducted emissions, which helps in plants with sensitive equipment on the same power bus.

Q: How do I replace the fan cartridge on the JG3?
The fan cartridge is a drop-in module accessible from the rear panel. To replace it: (1) remove the two retaining screws, (2) pull the cartridge straight out (it slides on guide rails), (3) slide the new cartridge in, (4) secure the screws. The fans will start automatically. You don’t need to open the power supply enclosure. We recommend keeping a spare fan cartridge on hand—it’s a standard assembly with two 92mm fans, 12V DC, 50 CFM total. We can supply replacement cartridges separately.

Q: The Fault LED is red, but the DC OK LED is green. What’s happening?
Green DC OK means the 24V output is within spec. Red Fault indicates an internal warning—typically overtemperature (fan failure or blocked airflow) or an input voltage out of range (below 180VAC or above 265VAC). The JG3’s fan cartridge is modular—if both fans fail, the Fault LED will light and the supply will derate to 50% output. Check the fan cartridge for dust buildup—a blocked filter can cause overtemperature. The JG3’s thermal sensor triggers the fault at 80°C.

Q: The inrush current is 36A peak. Is that a concern for my branch breaker?
36A peak for 2ms is within the tolerance of most 20A C-curve breakers. The JG3’s inrush is 2A lower than the JG2’s and 9A lower than the JG1’s—a steady improvement across revisions. If you have multiple JG3s in a panel (e.g., two supplies in separate racks), the combined inrush of 72A may trip a 30A breaker on startup. Use D-curve breakers or sequence the power-up of the supplies by stagerring the AC feeds.

Q: The Overload LED is amber. What does that mean?
Amber Overload LED indicates the supply is drawing more than its continuous rating (62.5A). At loads between 62.5A and 75A, it’ll light amber and continue running—but the output voltage may droop (down to 22V). If the load exceeds 75A, the supply enters foldback current limiting (output drops to about 12V, and the LED flashes). Check your rack’s total load with a clamp meter on the backplane’s 24V line. If you’re consistently seeing amber, consider adding a second JG3 in parallel.

Q: Can I run two JG3 supplies in parallel for redundancy?
Yes—the JG3 has internal OR-ing diodes. Connect the DC outputs together (+24V to +24V, 0V to 0V) and feed the AC inputs from separate breakers. Each supply will share the load roughly equally (within 5%). The blue “Load Share” LED will light when both supplies are contributing. If one fails, the other takes the full load. In a redundant configuration, each supply should be sized for 50% of the load—for a 50A total load, two JG3s would each carry about 25A.

Q: Can I hot-swap the JG3 while the rack is powered?
The board supports hot-swapping when used in a redundant configuration (two supplies in parallel). In a single-supply configuration, pulling the supply will immediately shut down the entire rack—a guaranteed turbine trip. If you have redundant supplies, you can pull one—but only if the OR-ing diodes are present (they’re internal to the JG3). Verify the DC outputs are connected together before attempting.

Q: What’s the expected lifespan of the JG3?
The electrolytic capacitors are rated for 12,000 hours at 85°C. In a 40°C cabinet, the lifespan extends to about 18-22 years. The modular fan cartridge is rated for 60,000 hours at 40°C (about 6.8 years). The JG3’s improved efficiency and modular design help the capacitors run cooler, extending their life vs. the JG2. We recommend replacing the fan cartridge every 5-7 years proactively.

Q: What’s the lead time for a surplus unit?
We keep 2-3 units in stock. Domestic: 2-3 business days ground, overnight if ordered by 2 PM EST. International: 5-7 days via DHL, with customs potentially adding 1-3 days. This board is not ITAR-controlled, so we can ship to most countries without an export license. We include a GE certificate of origin and commercial invoice with every shipment. Contact us if you need expedited shipping for a critical outage.

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