Product Details

Baumuller 3.0122K, also marked as 30122K, is a dedicated capacitor power board for the Baumuller BM4434 legacy servo drive series. This capacitor power board carries the DC‑link capacitor bank, voltage smoothing circuits and pre‑charge components to stabilize the main DC bus inside the servo drive. It absorbs voltage ripples, stores energy for peak torque demand and suppresses bus voltage spikes during motor acceleration, deceleration and regenerative braking. The drive power PCB adopts heavy‑copper industrial FR4 layout with conformal coating, offering reliable protection against dust, moisture and corrosive vapors within control cabinets. As an obsolete and scarce discontinued spare, it serves as a direct drop‑in replacement to restore stable DC‑link power supply and full power stage operation for ageing Baumuller servo drives.

Basic Parameters

Brand: Baumuller

Model: 3.0122K, alternative marking: 30122K

Product Type: Servo drive DC‑link capacitor power PCB board

Main Function: DC bus smoothing, energy buffering, pre‑charge control, ripple suppression, bus voltage stabilization

Interfaces: High‑power bus terminals, backplane power connectors, monitoring signal pins

PCB Treatment: Conformal coated heavy copper multi‑layer circuit board, UL 94V‑0 flame retardant

Mounting: Internal fixed mounting inside compatible BM4434 servo drive housing

Supply Voltage: Connected to drive internal DC link circuit

Net Weight: Approximately 340 g

Condition: Original discontinued industrial spare

Supported Functions

This capacitor power board supports continuous DC‑link stabilization for high‑dynamic servo operation. The DC link board buffers energy for sudden torque surges and absorbs regenerative energy fed back from the servo motor. It works with the rectifier and inverter sections to maintain a steady bus voltage, preventing under‑voltage or over‑voltage trips during heavy cyclic motion. It also provides hardware‑level voltage monitoring for fault detection. If this power board fails, the drive will trigger DC link faults and cannot enable power output; replacing this drive power PCB quickly recovers the power stage of the servo unit.

Core Functions

The core function of this capacitor power board is DC‑link energy storage and voltage smoothing for the servo drive. It reduces bus ripple and maintains stable power delivery to the IGBT power stage under variable load conditions. It helps absorb regenerative energy and protects adjacent power electronics from voltage transients. It acts as a drop‑in replacement spare to rebuild the main power circuit of legacy Baumuller motion machinery and avoid unplanned downtime on old production lines.

Hardware Specifications & Environmental Features

Operating Temperature: 0°C ~ +60°C

Storage Temperature: -20°C ~ +75°C

Relative Humidity: 5%–95%, non‑condensing

Housing: Bare coated power PCB with heavy‑duty terminals

Protection: Overvoltage suppression, ESD protection for signal ports, IP20

Anti‑interference: Onboard snubber and filtering circuits to suppress electromagnetic noise inside cabinets

Compatibility: Matched for Baumuller BM4434 servo drive units

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note：Confirm drive model compatibility, DC link rating and terminal torque specification before ordering.

This is from our current stock.

available stock.xlsx