IC3600EPSW1 low-voltage regulator card overview

The IC3600EPSW1 is a regulator card from the IC3600EPS power-supply group of the GE Speedtronic Mark I / Mark II turbine control system, the earliest Speedtronic platform of discrete plug-in cards. In the EPS group's division of labor it is the low-voltage regulator, designated as the 12 V / 5 V card: it derives a regulated low-voltage logic rail from a higher supply rail and holds it steady for the rack. Where the EPSS regulator produces the -12 V rail from the -50 V bus, the EPSW handles the lower 12 V / 5 V end of the supply.

The 5 V rail is the one the panel's logic depends on most directly, so a fault here rarely stays local. When it drifts or collapses you tend to see erratic, seemingly unrelated logic behavior across several cards at once — which is precisely why this card gets blamed for problems it did not cause.

Rule out the load and the input rail first

A low or missing 5 V rail is one of the most misdiagnosed conditions on a legacy rack. Before ordering a replacement EPSW, work through these checks:

• Suspect a downstream short before the regulator. A single shorted or failing card on the 5 V rail can pull the whole rail down and make the regulator look faulty. Remove or isolate cards one at a time and watch whether the rail recovers.
• Confirm the input rail. The EPSW needs its higher input rail present and in tolerance to produce the regulated output. If the input is low or absent, correct that upstream first.
• Clean and reseat the edge connector. Contaminated edge fingers and a poor rack seat cause the sort of intermittent, tap-sensitive rail faults that imitate a failed regulator on every IC3600 board.
• Measure input and output together. A good input with a bad output, and the rail staying low even with the load removed, is the combination that finally implicates the EPSW itself.

Because the 5 V rail touches so much of the panel, taking the time to isolate the load protects both your spare and your troubleshooting time.

Making sense of the IC3600EPSW1 number

IC3600 identifies the Mark I / Mark II Speedtronic card series, EPS the power-supply group, and W this specific regulator (the 12 V / 5 V card, as distinct from the S regulator, the D 28 V supply and the C inverter drive). The trailing 1 is the revision or dash detail; where a longer suffix appears on a given board, match it in full. The GE Speedtronic Part Number Decoder lays out how the blocks are read.

The EPSW in the wider Mark I-II supply chain

The EPSW works alongside the rest of the EPS group: the EPSS regulator, the EPSD 28 V supply, the EPSU/EPSV primary supply pair and the EPSC inverter drive. Because each card handles a different rail, the quickest way to localize a supply problem is to compare against known-good neighbors. Our GE Mark I-II IC3600 Cards collection gathers the group together, and GE Speedtronic Turbine Control Boards covers the broader control range. Mark I-II predates triple-redundant control, so the EPSW is single-channel supply hardware, not a voted R/S/T channel.

Help us quote your IC3600EPSW1 accurately

To get you the right regulator, please include:

• The complete part number and any suffix printed on the board, for example IC3600EPSW1.
• A photo of the label and the board where possible.
• Your turbine model and Speedtronic generation (Mark I or Mark II).
• Quantity needed and your timeframe.

Request a quote for the IC3600EPSW1

This IC3600EPSW1 is offered as new surplus, no box. Click Request a Quote and we will respond within 24 hours. We ship worldwide DDP, accept purchase orders from qualified organizations, and can help you gather the neighboring EPS cards if you are working through the whole power supply.

General Information about the Product
Part Number	IC3600EPSW1 Mark I-II IC3600
Description	IC3600EPSW1 By GE Speedtronic IC3600EPSW 12V/5V Regulator Card NSNB
Condition	newSurplusNoBox With 1 Year Warranty.