531X111PSHAEH1 | GE Factory Tested & ISO Certified

Description

Product Introduction

The 531X111PSHAEH1 is the latest evolution of GE’s 800W Mark V power supply. It delivers the same brute-force capacity as the AEG1, but with a refreshed thermal design—the dual fans are now modular and hot-swappable, and the heatsink was redesigned for better airflow. If your rack is pulling 30A and running hot, this supply gives you both the current and the cooling to keep it stable.

Compared to the 531X111PSHAEG1, the “H1” revision is a meaningful hardware upgrade: the dual fans are now field-replaceable without powering down the supply (hot-swappable), the efficiency was bumped from 92% to 93% at full load, and the hold-up time was extended from 45ms to 50ms. 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 EH1 over the EG1?
The EH1 has hot-swappable fans—you can replace a failed fan while the supply is running without powering down the rack. The efficiency was improved to 93% (vs. 92%), reducing heat generation by about 8W at full load. The hold-up time increased to 50ms (vs. 45ms), giving your UPS more time to transfer. The extended operating temperature range (60°C vs. 55°C) is also a welcome change for hot cabinets. The inrush current was reduced from 40A to 35A, placing less stress on upstream breakers.

Q: How do I replace a fan on the EH1 while the supply is running?
The fans are modular and hot-swappable. Each fan has a finger-grip handle and a locking latch. To replace a fan: (1) pull the latch to release it, (2) slide the fan module out, (3) slide in the new fan, (4) press the latch to lock it. The fan will start automatically. You can replace one fan at a time—the other fan continues running, so the supply stays cool enough. We recommend keeping spare fan modules on hand—they’re standard 80mm x 25mm, 12V DC units rated at 40 CFM. We can supply them 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 85VAC or above 265VAC). The EH1 has dual hot-swappable fans—check both. If one fan fails, the Fault LED will light to warn you, but the supply can continue running with reduced airflow. The EH1’s thermal sensor triggers the fault at 80°C—if the temperature reaches 85°C, the supply will shut down.

Q: The inrush current is 35A peak. Is that a concern for my branch breaker?
35A peak for 2ms is within the tolerance of most 20A C-curve breakers. The EH1’s inrush is 5A lower than the EG1’s—a meaningful improvement. If you have multiple EH1s in a panel (e.g., two supplies in separate racks), the combined inrush of 70A may trip a 30A breaker on startup. Use D-curve breakers (which tolerate higher inrush) 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 (33.3A). At loads between 33.3A and 40A, it’ll light amber and continue running—but the output voltage may droop (down to 22V). If the load exceeds 40A, 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 supply in parallel.

Q: Can I run two EH1 supplies in parallel for redundancy?
Yes—the EH1 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 30A total load, two EH1s would each carry about 15A.

Q: Can I hot-swap the EH1 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 EH1). Verify the DC outputs are connected together before attempting.

Q: What’s the expected lifespan of the EH1?
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 hot-swappable fans are each rated for 60,000 hours at 40°C (about 6.8 years). The EH1’s improved efficiency and dual-fan design help the capacitors run cooler, extending their life vs. the EG1. We recommend replacing both fans every 5-7 years proactively—with the hot-swappable design, it’s a quick maintenance task.

Q: What’s the lead time for a surplus unit?
We keep 2-4 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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