Original Siemens 430/440/S120 Inverter/Converter Power Supply Board C98043-A7600-L3 C98043A7600L3 C98O43-A76OO-L3

C98043-A7600-L3 | Siemens Inverter Power Board — C98043-A7600 Series / L3 Revision / Drive Inverter PCB Spare

C98043-A7600 — Inverter Power Board Family

The C98043-A7600-L3 is an inverter power board — a PCB within the Siemens C98043-A7600 drive board family. Within the broader C98043 spare parts system, the A7600 sub-family is specifically identified as the inverter power board series — distinct from other C98043 board families serving power interface (A7002), field supply (A7004), and other drive functions.

The C98043 prefix spans Siemens' drive spare parts family for multiple platforms — including SIMOREG DC drives and SIMOVERT AC inverter drives. The A7600 designation positions this board in the inverter power section of the applicable drive platform.

Key Product Information

Inverter Power Board — Function in Drive Architecture

Inverter power boards in the C98043-A7600 family serve defined functions within the drive's inverter power section. In Siemens drive architectures using the C98043 spare parts system, inverter power boards typically:

Transistor interface: Connect to the drive's switching transistors (IGBT or other power devices) — providing gate drive signals, transistor monitoring, and fault detection at the power stage level.

Power measurement: Provide current and voltage measurement points for the drive's feedback and protection circuits — measuring actual motor current and drive output voltage for closed-loop control.

Protection coordination: Detect overcurrent, overvoltage, or transistor fault conditions at the power stage and signal the drive's control electronics for protective shutdown.

The screw terminal or connector interface on the C98043-A7600-L3 connects the board to the surrounding drive hardware within its specific drive platform.

Application Scenarios

Inverter power board fault: A Siemens drive system develops power-stage level faults traceable to the C98043-A7600-L3 inverter power board. The board is identified from its label. Replacement restores correct power-stage interface function.

Drive maintenance: A production facility maintaining Siemens drive equipment replaces C98043-A7600-L3 as part of a planned drive overhaul — renewing the inverter power board to prevent age-related failures.

FAQ

Q1: How do I confirm C98043-A7600-L3 is the correct board for my drive system?

Read the part number from the installed board's label inside the drive unit. If it reads C98043-A7600-L3, this is the confirmed replacement. The full part number including the L3 revision level must match — cross-reference with the applicable drive maintenance manual's spare parts table and board assembly diagram.

Q2: Is C98043-A7600-L3 interchangeable with L4 or L5 variants?

Not without verification. Different L-level revisions within the A7600 family may be hardware-compatible or may involve component or interface changes. Substituting an L4 or L5 for L3 (or vice versa) requires confirmation in the applicable drive documentation. Some L-level changes are backward compatible; others introduce hardware differences that prevent substitution. Confirm from the drive's spare parts table before substituting.

Q3: What fault symptoms indicate a C98043-A7600-L3 inverter power board failure?

Inverter power board faults typically produce: power-stage alarms (overcurrent, phase fault, transistor fault) that occur at low or zero current on drive enable, asymmetric motor current in the three phases (indicating incorrect switching in one or more phases), or loss of one or more current feedback signals causing the drive to fault on current measurement error. If the power transistors and motor test as healthy but these alarms persist, the inverter power board is the diagnostic priority.

Q4: What safety precautions apply when replacing C98043-A7600-L3?

Isolate and lock out the mains supply to the drive. The drive's DC bus retains hazardous voltage after mains isolation — allow the full discharge interval and verify DC bus voltage is below 50V before accessing internal components. The C98043-A7600-L3 is located within the power section of the drive adjacent to components at full DC bus potential. Handle the replacement board with an anti-static wrist strap on an ESD-safe surface.