Original Siemens Mm440/15kw/18.5kw/22kw/30kw/37kw Power Driver Board A5E00430139 A5EOO43O139

A5E00430139 | Siemens MICROMASTER 440 Inverter Drive Board — 18.5 / 22 / 30 / 37kW / MM440 Gate Trigger Board Spare

MICROMASTER 440 — Vector Control for Demanding Applications

The MICROMASTER 440 (MM440) is Siemens' full-featured variable speed drive from the MICROMASTER family — the highest-specification platform in the range, designed for applications requiring advanced control capability:

Full vector control: The MM440 implements field-oriented vector control for AC induction motors — providing fast, accurate torque response independent of motor speed. This distinguishes it from simpler V/Hz (volts-per-hertz) control drives and enables precise speed regulation under rapidly varying load conditions.

Integrated brake chopper: The MM440 includes a built-in braking resistor connection in all power ratings — enabling dynamic braking without a separate brake chopper unit. This is critical in applications where the motor must be stopped quickly against significant inertia loads.

Closed-loop control options: The MM440 supports encoder feedback for closed-loop speed control — delivering high-accuracy speed regulation and the ability to operate at very low speeds (including standstill torque) without speed drift.

The A5E00430139 drive board is the internal gate trigger PCB that enables the MM440's inverter to function at the 18.5–37kW power level.

Key Specifications

18.5–37kW — Four Drive Models, One Board

A5E00430139 covers four rated power outputs in the MM440 range:

18.5kW: Upper-end machine tool auxiliary drives, HVAC fans and pumps, textile machinery.

22kW: The 22kW rating — most frequently referenced in market listings — represents a widely deployed power class for industrial fan and pump applications, conveyor drives, and general machine automation.

30kW: Mid-range industrial applications — larger conveyor systems, medium-sized compressor drives, and process plant feed pumps.

37kW: The upper power rating of this board — approaching the boundary of the standard Frame C/D physical size, serving larger motors in the same application categories.

Application Scenarios

MM440 drive board fault — 22kW: A MICROMASTER 440 at 22kW develops inverter faults immediately on enable. The IGBT transistors test as undamaged. A5E00430139 is identified as the gate trigger board fault. Replacement restores correct IGBT switching.

30kW MM440 maintenance: An MM440 drive at 30kW undergoes planned internal board renewal. A5E00430139 is replaced preventively alongside the IGBT transistors to ensure long-term drive reliability.

FAQ

Q1: What is the difference between A5E00430139 (MM440) and A5E00430140 (MM430) — can they be substituted?

No. A5E00430139 is the drive board for the MICROMASTER 440 (6SE6440) at 18.5–37kW. A5E00430140 is the drive board for the MICROMASTER 430 (6SE6430) at 22–45kW. Despite adjacent part numbers, these boards are drive-model specific and not interchangeable. Always confirm from the installed drive's model number and the board's own label before ordering.

Q2: What MM440 fault codes indicate an A5E00430139 drive board failure?

Gate trigger board faults produce inverter alarms — typically F002 (overcurrent) or related hardware faults appearing immediately on drive enable at zero or very low current. These differ from motor-related faults (which appear at load current during running) and from parameter faults (software alarms). If the IGBT transistors pass static testing but the drive consistently faults on enable, A5E00430139 is the diagnostic priority.

Q3: Does A5E00430139 cover all four power ratings (18.5/22/30/37kW) without modification?

Yes. The same A5E00430139 board serves all four power ratings within its specified range. No hardware modification or configuration change is needed when using the board across different kW ratings within the 18.5–37kW span.

Q4: What safety precautions apply when replacing A5E00430139?

Isolate and lock out the MM440 mains supply. The DC bus retains hazardous voltage after mains removal — verify bus voltage is below 50V before accessing internal components. The drive board mounts adjacent to the IGBT transistors at full bus potential. Handle with an anti-static wrist strap on an ESD-safe surface.