Servo Drive Power Filtering Solution – Nichicon 6800MFD400WV | WV Series
Where This Product Is Used
The Nichicon 6800MFD400WV is a high-capacitance, high-voltage aluminum electrolytic capacitor engineered for demanding industrial power electronics. Typical deployment environments include:
- AC Servo Motor Drives – DC bus bulk capacitance for Fanuc, Mitsubishi, Yaskawa, and Siemens servo amplifiers
- Variable Frequency Drives (VFDs) – Smoothing and energy storage on the rectified DC link in 3-phase inverter stages
- Industrial UPS & Power Supplies – Hold-up capacitance in 380–480 VAC input switch-mode power supplies
- CNC Machine Tool Controllers – Spindle drive and axis drive DC bus filtering
- Robotics & Motion Control Systems – Energy buffer for regenerative braking circuits
- Elevator & Crane Drive Systems – Peak-load energy storage in heavy-duty motor controllers
- Welding Equipment – Energy reservoir in inverter-based MIG/TIG welding power sources
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6800MFD400WV |
| Capacitance | 6800 µF (6800 MFD) |
| Rated Voltage (DC) | 400 V |
| Series | WV Series (Snap-in, High Ripple) |
| Manufacturer | Nichicon Corporation (Japan) |
| Case Style | Snap-in / Screw Terminal (confirm datasheet) |
| Temperature Range | –25°C to +85°C (standard); confirm extended grade |
| Ripple Current | High ripple current rating — suitable for inverter duty |
| Polarity | Polarized (aluminum electrolytic) |
| Compliance | RoHS compliant |
| Weight | Approx. 1,250 g |
Why Engineers Specify This Model
- High Energy Density – 6800 µF at 400 V delivers 544 J of stored energy, sufficient for multi-axis servo bus stabilization
- Nichicon WV Series Reliability – Designed for long service life under continuous high-ripple conditions typical of PWM inverter loads
- Drop-in Replacement Compatibility – Matches OEM specifications for common servo drive platforms, reducing downtime during maintenance
- Proven Industrial Pedigree – Nichicon is a Tier-1 Japanese capacitor manufacturer with decades of supply to major automation OEMs
- Broad Voltage Headroom – 400 V rating provides adequate derating margin on 380 VAC (537 V peak) rectified bus systems
Complete System Bill of Materials
When replacing or specifying this capacitor in a servo drive system, consider sourcing the following complementary components:
- Rectifier bridge module (3-phase, matched current rating)
- Inrush current limiting NTC thermistor or bypass relay
- DC bus voltage monitoring relay or overvoltage protection module
- Capacitor mounting clamp / bracket hardware
- Bus bar or terminal lug connectors (M6 or M8, per drive spec)
- Servo drive control board (if full drive rebuild)
Compliance & Industry Standards
- RoHS 2011/65/EU compliant — no restricted hazardous substances
- Manufactured under ISO 9001 quality management system
- Meets IEC 60384-4 standard for aluminum electrolytic capacitors for use in electronic equipment
- Suitable for CE-marked drive assemblies when installed per application guidelines
Quality Assurance & Sourcing
All capacitors supplied by Konmask.com are sourced through verified industrial distribution channels. Each unit undergoes incoming inspection including:
- Visual inspection for case integrity and terminal condition
- Date code verification against manufacturer production records
- Capacitance and ESR spot-check testing on representative samples
- Anti-counterfeit verification against Nichicon authorized distributor documentation
We do not supply grey-market, refurbished, or remarked components. Traceability documentation available on request.
How to Source This Part
- In Stock: Add to cart and proceed to checkout — global shipping available
- Bulk / OEM Orders: Contact us for volume pricing on 10+ units
- Urgent Requirement: Email support@konmask.com with your required delivery date
- Cross-Reference: Provide your OEM part number and we will confirm compatibility
Application-Specific FAQ
Q: Can I use this capacitor to replace the DC bus capacitor in my Fanuc servo amplifier?
A: In many cases yes — verify the capacitance value, voltage rating, case dimensions, and terminal pitch against your amplifier’s service manual before installation.
Q: What is the expected service life?
A: Nichicon WV series capacitors are rated for 2,000–5,000 hours at maximum rated temperature and ripple. At typical operating conditions (70°C, 80% ripple), service life exceeds 10 years.
Q: Is this a polarized component?
A: Yes. Aluminum electrolytic capacitors are polarized. Ensure correct polarity when installing on the DC bus — reverse voltage will cause catastrophic failure.
Q: Do you provide a datasheet?
A: Yes. Contact us at support@konmask.com and reference part number 6800MFD400WV.
Q: Can this be used in a 480 VAC system?
A: A 480 VAC 3-phase system produces approximately 679 V peak on the DC bus. A 400 V capacitor is not suitable for this application — a 450 V or 500 V rated unit is required.
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