Siemens A5E00496080 Capacitor Board – G120 45–55 kW Tested Spare

What Is the A5E00496080 Capacitor/Power Board?

The Siemens A5E00496080 is the DC-link capacitor and power board used in SINAMICS G120 drive systems with PM240 / PM340 power modules in the 45–55 kW range. Its primary function is to smooth and store energy on the DC bus, providing the stable intermediate circuit voltage required by the IGBT inverter stage. Unlike control units or I/O boards, this is a power-stage component—it operates at DC bus potential and its condition directly determines whether the drive can enable its output.

Supplied as a tested replacement unit, it is intended for maintenance scenarios where the original capacitor board shows degradation, damage, or is implicated in a power-module fault that cannot be resolved through capacitor forming alone.

Technical Specifications

Important Distinction: The A5E00496080 is the capacitor/power board, not the Control Unit (CU) or the IGBT power block. F30022 can originate from capacitor failure, IGBT failure, or a self-test failure—replacing the capacitor board is appropriate when capacitor degradation is confirmed, not as a blanket fix for every F30022 occurrence.

When to Replace the A5E00496080 Capacitor Board

The most reliable indicator for this board is F30022 (Power module faulty), especially when the drive has been stored unpowered for an extended period.

• F30022 after long-term storage — DC-link electrolytic capacitors degrade when a drive sits unpowered for 2–3 years or more. Electrolyte dries out partially, the dielectric oxide layer breaks down, and internal resistance rises. The drive detects this condition and refuses to enable its output stages.
• Visible capacitor damage — bulging, leaking, or discoloration on the DC-link capacitor bank during visual inspection.
• Failed capacitor forming — if the recommended forming procedure (gradual voltage application) does not clear F30022, capacitor replacement becomes the next step.
• F30003 (DC-link undervoltage) — in some cases, severe capacitor degradation can contribute to abnormal DC-link behavior, though mains supply and braking energy should be ruled out first.

Compatibility & Verification

Before ordering, confirm the following:

• Power module MLFB — the exact order number on the PM240/PM340 nameplate, not only the kW rating.
• Existing board marking — confirm the original board reads A5E00496080, and check whether an alternate number (A5E01206074 / A5E00496081) is present on the label.
• Fault history — confirm F30022 is the active fault and that capacitor forming has been attempted or ruled out where applicable.
• If any point is unclear, send a photo of the power module nameplate and the original board label for review before purchase.

Frequently Asked Questions

Is A5E00496080 a Control Unit or a power board?
It is a capacitor/power board within the PM240/PM340 power module. It is not the Control Unit (CU) and not the IGBT power block.

What fault code does a failed capacitor board typically cause?
F30022 (Power module faulty) is the most relevant fault. It can also be triggered by IGBT failure or self-test failure, so capacitor forming and diagnostic steps should be completed before concluding the board is the root cause.

Are A5E01206074 and A5E00496081 direct replacements?
They appear in listings as related/alternate numbers for the same power-board family. Equivalence should be verified against the power module MLFB and the original board label before ordering.