GE Turbine Control & Drive Spare Parts: Mark I/II, Mark IV, Mark V, Mark VI and Series 90 Components
General Electric's Speedtronic turbine control systems and GE Fanuc industrial drive platforms are among the most widely installed automation and power generation control architectures in the world. Gas turbines, steam turbines, hydro plants, and heavy industrial drive systems running on GE control hardware operate across power generation facilities, oil and gas installations, and manufacturing plants on every continent.
When a board fails in a GE Mark IV, Mark V, or Mark VI turbine control system, or in a GE Fanuc Series 90 PLC or 531X drive control rack — the search for a genuine replacement part under time pressure is one of the most challenging sourcing situations in industrial maintenance. Many of these boards are discontinued or approaching end-of-life, making verified-stock suppliers critical.
This guide covers the most in-demand GE turbine control and drive spare parts by platform family, with part numbers, functions, and direct links to availability at Industrial Partner.
Industrial Partner stocks GE turbine control boards, GE Fanuc drive modules, and Series 90 PLC components — including discontinued IC3600, DS3800, IS200, 531X, and IC300 series parts. Browse GE components or request a quote.
GE Mark I and Mark II Turbine Control — IC3600 Series Boards
The IC3600 series boards form the control core of GE's original Speedtronic Mark I and Mark II gas turbine control systems. Introduced in the early 1970s, these systems remain operational in power generation facilities worldwide, and their discrete analog and digital control boards are among the highest-demand discontinued GE components in the global industrial MRO market.
The IC3600 platform uses individual plug-in circuit boards for each control function, power supply, voltage regulation, fuel control, speed control, and protection logic, making board-level replacement the primary maintenance strategy. Because these boards are long discontinued, sourcing verified units requires a specialist supplier.
IC3600 Series — High-Demand Part Numbers
The following IC3600 boards are among the most actively searched GE Mark I/II replacement components:
All IC3600 series boards above are stocked at Industrial Partner. Browse GE IC3600 components or contact the team for same-day quote on any IC3600 part number.
GE Mark IV Turbine Control — DS3800 Series Boards
The GE Speedtronic Mark IV represented a significant evolution from the Mark I/II architecture — introducing microprocessor-based control logic while maintaining the modular plug-in board format. The DS3800 prefix identifies Mark IV boards, which are used in gas and steam turbine control applications and remain in active service across legacy power generation installations.
Mark IV DS3800 boards handle functions including firing circuit control, analog I/O processing, communication, power supply, and protection logic. Like IC3600 series parts, genuine DS3800 boards are discontinued by GE and must be sourced through specialist MRO suppliers.
Industrial Partner maintains DS3800 Mark IV inventory. Request a quote for DS3800 series components.
GE Mark VI Turbine Control — IS200 Series Boards
The GE Speedtronic Mark VI is GE's most advanced turbine control platform and the current generation architecture for gas and steam turbine management in large power generation applications. Introduced in the late 1990s, the Mark VI uses a triple-redundant distributed control architecture with IS200-prefix boards handling specific control, I/O, communication, and protection functions.
Although the Mark VI is more recent than Mark I through IV systems, IS200 boards are still subject to component availability issues as GE transitions to newer platforms. Sourcing replacement IS200 boards for operational Mark VI systems requires verified stock from qualified industrial suppliers.
Browse GE Mark VI IS200 components at Industrial Partner, including IS200AEPAH1A and related excitation and I/O boards.
GE 531X Series — Industrial Drive Control Boards
The GE 531X platform covers control boards used in GE's AC-300, DC-300, and AC-500 general purpose industrial drive systems. These drives are widely installed in heavy manufacturing, metals processing, paper mills, and other continuous-process industries. The 531X boards provide micro-application interface, terminal board, and control logic functions within these drive systems.
While GE has transitioned to newer drive platforms, the 531X architecture remains in active use and replacement boards are frequently required for ongoing maintenance.
Source 531X series drive boards at Industrial Partner — including discontinued and hard-to-find 531X application boards.
GE Fanuc Series 90 PLC — IC300 Series Modules
The GE Fanuc Series 90 PLC family — including the Series 90-20, Series 90-30, and Series 90-70 platforms — uses IC300, IC693, and IC695 prefix modules. The IC300 OCS (Operator Control Station) series provides operator interface and I/O processing functions for the Series 90 platform.
Series 90 PLCs are installed across a wide range of manufacturing and process control applications. IC300 modules including analog output and analog input cards are frequently needed for ongoing maintenance and are subject to increasing lead times as the platform matures.
Browse GE Fanuc Series 90 IC300 analog modules and PLC components at Industrial Partner.
Why GE Turbine and Drive Control Parts Are Difficult to Source
The IC3600, DS3800, IS200, 531X, and IC300 series all share a common challenge: they were designed and manufactured for platforms with 20 to 40-year operational lifespans, but the original manufacturing runs are long complete. GE has transitioned to newer platform generations, and standard distribution channels have depleted stock of most older part numbers.
The consequence for maintenance teams is that when a Mark I, II, or IV turbine control board fails, the path to a replacement part runs through specialist industrial MRO suppliers — not standard automation distributors. The same is true for 531X drive boards and IC300 PLC modules in legacy Series 90 installations.
Three factors make sourcing these parts particularly high-stakes:
Industrial Partner: We maintain verified inventory of GE turbine control boards across the IC3600, DS3800, IS200, 531X, and IC300 series — including multiple hardware revisions for high-demand part numbers. Our technical team confirms revision compatibility before dispatch. Browse GE components or request a same-day quote.
Conclusion
GE Speedtronic turbine control systems and GE Fanuc drive and PLC platforms are the backbone of power generation and heavy industrial automation in facilities worldwide. The IC3600 Mark I/II boards, DS3800 Mark IV boards, IS200 Mark VI boards, 531X drive boards, and IC300 Series 90 PLC modules covered in this guide are among the most actively searched GE components in the industrial MRO market — precisely because the combination of long operational lifespans and discontinued manufacturing creates persistent sourcing demand.
For maintenance teams managing these platforms, having a verified supplier with confirmed stock — and the technical expertise to confirm hardware revision compatibility — is the difference between a planned maintenance swap and a multi-day turbine outage.
Industrial Partner stocks GE turbine control and drive spare parts across all major Mark series and Series 90 PLC platforms.
