Open-Box Surplus for a Critical Distribution Card

This DS200TCPDG1BDC is new surplus supplied without its original factory carton — the "open box" in the title. The board itself is uninstalled; only the packaging differs from our factory-sealed listing of the same number, and the condition table below states exactly what is supplied and warranted. For a component whose production ended with the Mark V line, open-box surplus is often the fastest route to a genuine, unused board.

The TCPD's Job in the Power Distribution Core

Inside every Speedtronic Mark V panel, one core exists purely to manage power: <PD>. The TCPD board mounted there takes the incoming feeds — battery-backed 125 V DC, and 115/230 V AC where a DACA converter rectifies it — and distributes fused 125 V DC outward: to the DS200TCPS supply in each of <R>, <S>, <T>, and <C>; to the TCEA protection boards on the X, Y, and Z channels of the protective core; and through auxiliary feeds for solenoids and gas turbine ignition transformers described in the application documentation. Thirty-six canister fuses with individual green OK LEDs, eight core power toggle switches, and four AC terminals (AC1H/AC1N/AC2H/AC2N) make up its working surface.

Symptoms That Point Away from the TCPD

Buy this board to fix a confirmed distribution failure — not to go looking for one. These patterns usually implicate other hardware:

• A single core rebooting or hanging during boot: the core's own TCPS supply and ribbon cables lead the suspect list. A widely read Mark V thread traced weeks of <S> core reboots to exactly that, with the TCPD exonerated early after every output wire had been lifted and checked.
• Ground fault annunciated on the DC system: often external — station battery condition (electrolyte leaks are a documented culprit), field wiring, or other loads sharing the 125 V DC bus.
• All fuse LEDs dark: loss of incoming supply, not board failure. Verify battery, breaker, and DACA output first.
• The same fuse clearing repeatedly: a downstream short. The fuse and its LED are doing their job; the distribution board is healthy.

Genuine board-level failures show as damaged terminals, worn toggle switches, or fuse positions that no longer hold — mechanical wear, visible on inspection and worth photographing for your records and for our team.

Part Number Anatomy: DS200TCPDG1BDC

Reading left to right: DS200 marks the GE board series; TCPD identifies the function (power distribution); G1 is the group — the compatibility boundary that must match your installed board, since G1 and G2 are different builds and G-group numbers never stand in for H-group numbers; BDC is the revision block, read by the trade as functional revision B, second revision D, artwork revision C. If your label reads G1BCC or G1BEC instead, we stock those revisions as well — quote the string exactly as printed and we will match it. Method and examples: GE Speedtronic Part Number Decoder.

Cross-Referencing Within the Speedtronic Line

The TCPD anchors the power layer of the DS200 card set alongside the TCPS supplies it feeds and the DACA converter ahead of it; TCEA protection boards and the DTBC/DTBD terminal boards complete the chain. Explore the full GE Mark V DS200 Boards collection, the platform overview in GE Mark V DS200 Boards Explained, and — for sites weighing retrofit against continued Mark V support — Mark V vs Mark VI: DS200 to IS200. The broader inventory, spanning generations, lives under GE Speedtronic Turbine Control Boards.

Quote Turnaround and Shipping Terms

Request a Quote with the full part number and revision from your label, a label photo, turbine model, Simplex or TMR configuration, quantity, and how quickly you need it. Our response arrives within 24 hours. Shipping is DDP to your site anywhere in the world — duties and clearance are our problem, not yours — and we accept purchase orders from plants and service contractors.

General Information about the Product
Part Number	DS200TCPDG1B Mark V DS200
Description	GE DS200TCPDG1B DS200TCPDG1BDC Power Distribution Board Mark V OPEN BOX
Condition	newSurplusNoBox Factory Packaged. With 1 Year Warranty