New-Surplus DS3810MMBE1A1A: A Complete Spare, Not Just a Board

This DS3810MMBE1A1A is a GE Mark IV memory module from the DS3810 assembly family, supplied new surplus in its factory package with a DS3800HUMB Universal Memory Board (UMB) mounted and ready to install. The DS3800HUMB is the card that stores the panel's application program and control constants on EPROM/EEPROM modules, which the <R>, <S>, and <T> processors in the Mark IV's Triple Modular Redundant (TMR) architecture read at every startup. Because a UMB failure effectively idles the whole panel until it's replaced, many sites choose to hold a factory-packaged spare like this one rather than wait on a repair cycle after the fact.

The mounted DS3800HUMB is built for fast rack exchange: a modular connector on one end and retention levers on the other allow it to be pulled and reinstalled without disturbing neighboring cards, and the front edge carries a single red LED plus a toggle switch used when erasing and reprogramming the memory modules. The board's jumpers, single-pin connectors, and module sockets are organized into four quads (A, B, C, D), and pin numbering restarts in each quad, so a referenced pin only makes sense once you know which quad it belongs to.

Confirm the Fault Before You Install a Spare

Even with a spare in hand, it's worth confirming the memory board is genuinely the problem before swapping it in:

• Reseat the existing board and confirm the connector and levers are fully engaged — loose seating after other rack work can mimic a hardware failure.
• Check whether the fault is really in the EPROM/EEPROM modules rather than the carrier board; modules are normally transplanted to a new carrier rather than sourced separately.
• Rule out rack power quality — sagging or noisy supply voltage can cause intermittent checksum faults that clear after a clean power cycle.
• Confirm the active alarm and quad genuinely point to the UMB, not a companion board, since the single LED is only a general status indicator.

Part Number Breakdown: Assembly and Board

"DS3810MMBE1A1A" identifies the carrier assembly and its revision; "DS3800HUMB" identifies the memory board function mounted on it. GE's trailing suffix codes mark specific hardware/firmware revisions that are not universally interchangeable — match both part numbers against your existing nameplates, and reach out if you want us to confirm the combination first. Our GE Speedtronic Part Number Decoder explains the general logic behind these part numbers.

Other Boards in the Same Mark IV Panel

Alongside this memory module, a Mark IV panel typically includes boards such as the DS3800HFPG Drive Control Board, DS3800HMPK Microprocessor/Regulator Control Board, and DS3800NDAC Analog Output Board, all listed in our GE Mark IV DS3800 Boards collection. If your facility is planning a longer-term migration, our Mark V vs Mark VI: DS200 to IS200 guide explains how later Speedtronic hardware families differ from Mark IV.

Have This Ready for Your Quote Request

• Full part numbers for the assembly and board (DS3810MMBE1A1A / DS3800HUMB)
• A photo of your existing nameplate(s), if replacing a failed unit
• Turbine model/frame and confirmation of Mark IV
• Quantity needed, including whether this is for spares stock
• Required lead time

Request a Quote — New Surplus, Factory Packaged

This DS3810MMBE1A1A with mounted DS3800HUMB is new surplus in factory package, cleaned and tested, with a 1-year warranty. We ship worldwide DDP (Delivered Duty Paid), accept purchase orders, and respond to quote requests within 24 hours. Submit a Request a Quote and our team will confirm it matches your turbine and panel.

General Information about the Product
Part Number	DS3810MMBE1A1A Mark IV DS3800
Description	DS3810MMBE1A1A by General Electric DS3810MMBE w DS3800HUMB Universal Mem Board
Condition	newSurplusFactoryPackage Cleaned and Tested. With 1 Year Warranty.