Fuji G11 Modules | G11-PPCB-4-1.5 SA528530-06 Power PCB

Technical Dossier

Product Details And Specifications

Fuji Electric G11 Series: Comprehensive Module Range and Technical Overview

The Fuji Electric G11 series represents one of the most widely deployed variable frequency drive (VFD) and industrial control platforms in global heavy industry. Installed across petrochemical complexes, nuclear power auxiliary systems, offshore refineries, and large-scale chemical processing plants, the G11 platform established Fuji Electric's position as a tier-one supplier for high-reliability motor control and power conversion infrastructure. Its modular PCB architecture — separating power, control, gate drive, and interface functions onto discrete boards — allows targeted component-level repair without full drive replacement, a critical factor for facilities operating under continuous-process constraints where unplanned downtime carries significant financial and safety consequences.

The Evolution of G11 Architecture

The G11 series was introduced by Fuji Electric as a successor to the earlier G9 and G7 drive families, incorporating IGBT-based power stages in place of earlier bipolar transistor designs. The initial G11 release targeted the 0.4 kW to 630 kW power range, with frame sizes designated by current rating and input voltage class (200V / 400V). The internal PCB architecture evolved across production runs: early units used discrete analog control circuits on the main control board, while later revisions integrated DSP-based vector control with enhanced parameter memory. The G11S variant introduced enhanced EMC filtering and extended ambient temperature tolerance for outdoor enclosure applications. Compatibility between early and late G11 PCB revisions requires verification of the SA-series part number suffix, as connector pinouts and firmware interfaces changed between major board revisions. The G11 has now entered the mature/end-of-life phase of its product lifecycle; Fuji Electric has transitioned current production to the FRENIC-Ace and FRENIC-MEGA series. However, the installed base of G11 drives in long-lifecycle industrial facilities remains substantial, and component-level PCB support continues to be the primary maintenance strategy for operators who cannot justify full drive replacement.

G11 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced components within the Fuji Electric G11 drive series, organized by functional category:

Power PCB / Gate Drive Boards

• G11-PPCB-4-1.5 SA528530-06: Power PCB for 400V class, 1.5 kW G11 frame; governs IGBT gate signal distribution and DC bus interface.
• G11-PPCB-4-2.2 SA528530-07: Power PCB for 400V class, 2.2 kW frame; compatible gate drive topology with revised current sensing resistor array.
• G11-PPCB-4-3.7 SA528531-01: Power PCB for 400V class, 3.7 kW frame; includes integrated thermistor input for IGBT junction temperature monitoring.
• G11-PPCB-4-5.5 SA528531-03: Power PCB for 400V class, 5.5 kW frame; dual-channel gate drive output with deadtime control circuit.
• G11-PPCB-4-7.5 SA528531-05: Power PCB for 400V class, 7.5 kW frame; reinforced DC bus capacitor discharge path for safety compliance.
• G11-PPCB-2-1.5 SA528532-02: Power PCB for 200V class, 1.5 kW frame; single-phase input compatible variant with modified rectifier interface.
• G11-PPCB-2-2.2 SA528532-04: Power PCB for 200V class, 2.2 kW frame; includes soft-charge relay drive circuit on-board.

Control PCB / CPU Boards

• G11-CPCB-A SA528520-01: Main control PCB; DSP-based vector control processor, parameter EEPROM, and analog I/O interface for standard G11 frames.
• G11-CPCB-B SA528520-03: Revised control PCB with extended parameter set and enhanced PID loop resolution; drop-in replacement for SA528520-01 in most frames.
• G11-CPCB-S SA528521-02: Control PCB for G11S variant; includes additional EMC filter stage and extended temperature-rated components.

Interface / Option PCBs

• G11-OPC-PR1 SA528540-01: PROFIBUS-DP communication option card; supports cyclic data exchange for process automation integration.
• G11-OPC-CC1 SA528541-01: CC-Link communication option card; compatible with Mitsubishi CC-Link master stations for mixed-vendor plant networks.
• G11-OPC-DV1 SA528542-01: DeviceNet option card; supports explicit and I/O messaging for Rockwell Automation network environments.
• G11-OPC-RS1 SA528543-01: RS-485 / Modbus RTU option card; provides serial fieldbus connectivity for legacy SCADA integration.

Power Supply / Fan PCBs

• G11-SPCB-4 SA528550-02: Switched-mode power supply PCB for 400V class frames; generates internal 5V, 15V, and 24V rails for control and gate drive circuits.
• G11-FANPCB-A SA528560-01: Cooling fan control PCB; manages variable-speed fan operation based on heatsink temperature feedback.

Sourcing Hard-to-Find & Obsolete G11 Parts

With the G11 series formally discontinued from Fuji Electric's active production schedule, procurement of replacement PCBs has shifted entirely to the secondary market and specialist distributors. DriveKNMS maintains a dedicated inventory program for G11 series boards, with particular focus on the SA528530-xx and SA528520-xx part number families, which represent the highest-demand replacement items across the installed base. For facilities operating G11 drives in continuous-process environments — where a single failed PCB can halt an entire production line — DriveKNMS provides: verified pull stock from decommissioned drives, professionally refurbished boards with full functional test documentation, and cross-reference support for identifying equivalent boards across G11 frame size variants. Long-term maintenance contracts covering multi-year spare parts reservation are available for operators managing large G11 fleets.

Quality Control for the G11 Range

G11 series PCBs present specific test challenges due to their integrated gate drive and power bus architecture. DriveKNMS applies a structured test protocol to all G11 boards prior to dispatch: incoming inspection verifies physical integrity of the PCB substrate, solder joints, and connector housings; functional test applies controlled DC bus voltage to verify gate signal output timing and deadtime compliance using an oscilloscope-based measurement fixture; IGBT driver output is verified against Fuji Electric's published gate voltage and current specifications for each frame size; EEPROM integrity is confirmed on control boards by parameter read-back verification; and thermal cycling is applied to boards intended for high-ambient-temperature installations. All test results are documented and supplied with each shipment on request.

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