Nichicon 6800MFD400WV Capacitor CE Series

Nichicon 6800MFD400WV Capacitor CE Series: Replacement and Sourcing Information

The Nichicon 6800MFD400WV is a high-capacitance, high-voltage electrolytic capacitor rated at 6800µF / 400V, engineered for demanding industrial power supply and motor drive applications. As a core component in the Nichicon CE Series, this capacitor delivers stable DC bus voltage, reduces ripple current losses, and supports the energy-efficient operation of variable frequency drives (VFDs), servo amplifiers, and industrial power conversion systems. For factories seeking to reduce idle energy consumption, minimize voltage transients, and extend the service life of drive electronics, the 6800MFD400WV is a proven, field-tested solution.

Product Specification Table

System Compatibility and Application

In a modern energy-optimized production line, the Nichicon 6800MFD400WV functions as the energy reservoir at the heart of the DC bus circuit. When paired with a Mitsubishi FR-A800 Series Variable Frequency Drive, the capacitor smooths the rectified DC voltage, reducing harmonic distortion and enabling the drive to deliver cleaner, more efficient power to three-phase induction motors. This directly translates to lower motor heating, reduced iron losses, and improved overall drive efficiency.

In servo motion control architectures, the 6800MFD400WV is commonly deployed alongside Yaskawa SGDV Series Servo Amplifiers and Panasonic MINAS A6 Servo Drivers, where it absorbs regenerative energy spikes during deceleration cycles. Without adequate capacitance on the DC bus, regenerative braking energy is dissipated as heat through braking resistors — a direct unplanned downtime. With the Nichicon CE Series capacitor in place, a portion of this energy is temporarily stored and reused, reducing the load on the braking resistor and lowering overall system heat generation.

For PLC-controlled automation cells using Siemens S7-1200 or S7-1500 PLCs, the power supply module feeding the controller rack benefits from stable upstream DC bus voltage. Voltage sags caused by motor start-up transients can cause PLC I/O modules to misread sensor signals, leading to false fault triggers and unplanned downtime. The 6800MFD400WV’s high capacitance buffers these transients, protecting the control layer from power quality disturbances.

In distributed I/O architectures using Beckhoff EtherCAT I/O terminals or Omron NX-series I/O modules, stable power supply voltage is critical for accurate analog signal acquisition. Condition monitoring sensors — such as Schneider Electric PowerLogic PM5000 Series Power Meters — rely on clean power to deliver accurate kWh, kVAR, and power factor readings. The Nichicon 6800MFD400WV, installed in the upstream power supply, ensures that these measurement devices receive stable operating voltage, improving the accuracy of energy audit data.

HMI panels such as the Weintek cMT Series or Siemens SIMATIC HMI TP1200, which display real-time energy consumption dashboards, are also indirectly protected by stable DC bus capacitance. Operators can monitor drive efficiency, motor load percentage, and energy consumption trends without interference from voltage noise — enabling faster, data-driven decisions on production scheduling and load balancing.

Maintenance and Replacement Notes

In high-cycle stamping and injection molding lines, motor drives experience frequent acceleration and deceleration cycles — sometimes hundreds of times per hour. Each cycle generates a voltage spike on the DC bus. Without sufficient capacitance, these spikes stress the IGBT modules inside the drive inverter, accelerating insulation degradation and increasing the risk of drive failure. The Nichicon 6800MFD400WV, with its 6800µF capacitance and 400V rating, provides the energy buffer needed to absorb these spikes, extending IGBT service life and reducing unplanned maintenance events.

From an energy consumption perspective, a drive operating with an undersized or degraded DC bus capacitor draws more reactive current from the supply, worsening the power factor and increasing apparent power demand. Facilities with power factor penalty clauses in their utility contracts can see measurable reductions in electricity bills by maintaining proper DC bus capacitance. Replacing aged or failed capacitors with the Nichicon 6800MFD400WV restores the drive’s designed power factor performance and reduces reactive power losses.

Predictive maintenance programs benefit directly from capacitor health monitoring. Many modern VFDs — including the ABB ACS880 Series — include built-in capacitor aging diagnostics that estimate remaining capacitor life based on operating hours and temperature history. By using a high-quality, long-life capacitor such as the Nichicon CE Series 6800MFD400WV, maintenance teams can extend the interval between scheduled capacitor replacements, reducing spare parts consumption and labor costs. All units supplied by ZYPLC undergo pre-shipment functional testing to verify capacitance, ESR (equivalent series resistance), and leakage current before dispatch, ensuring that every capacitor meets its rated specification on arrival.

In multi-axis CNC machining centers, where multiple servo axes share a common DC bus, the aggregate capacitance on the bus determines how well the system handles simultaneous axis deceleration. Insufficient capacitance leads to bus overvoltage faults, which trip the drive and halt the machining cycle — a costly interruption in high-value part production. Specifying the correct capacitance, such as the 6800MFD400WV, as part of the drive system design prevents these faults and keeps production throughput on target.

ZYPLC maintains ready stock of the Nichicon 6800MFD400WV to support urgent maintenance and production continuity requirements. All units are covered by a 12-month warranty and are available for rapid dispatch to minimize equipment downtime.

Product Sourcing FAQ

Q1: How does the Nichicon 6800MFD400WV improve energy efficiency in VFD applications?
The 6800MFD400WV stabilizes the DC bus voltage in variable frequency drives, reducing ripple current and switching losses. A stable DC bus allows the drive’s IGBT inverter to operate at its designed efficiency point, minimizing wasted energy as heat and improving the overall drive system efficiency rating.

Q2: Is the 6800MFD400WV compatible with drives from multiple manufacturers?
Yes. The Nichicon 6800MFD400WV is a standard aluminum electrolytic capacitor with industry-standard dimensions and electrical ratings. It is compatible with DC bus capacitor banks in drives from Mitsubishi, Yaskawa, Siemens, ABB, Omron, Fuji Electric, and other major VFD manufacturers, provided the capacitance and voltage ratings match the drive’s specification requirements.

Q3: What is the recommended replacement interval, and how do I assess capacitor condition?
Nichicon CE Series capacitors are rated for long service life under standard operating conditions. Replacement is recommended when capacitance drops below 80% of the rated value or ESR increases significantly above the initial specification. Many modern drives provide built-in capacitor diagnostics. ZYPLC recommends proactive replacement as part of scheduled drive maintenance to prevent unplanned downtime.

Q4: What testing is performed before shipment, and what does the 12-month warranty cover?
All Nichicon 6800MFD400WV units supplied by ZYPLC are tested for capacitance value, ESR, and leakage current prior to dispatch. The 12-month warranty covers manufacturing defects and parameter deviations from the rated specification. Units that fail to meet specification within the warranty period are replaced or refunded. Contact ZYPLC’s technical team for warranty claims and replacement support.

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