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High Voltage Ceramic Capacitor Expert
How does HVC solve the AVX exit crisis for high voltage doorknob capacitors?
In October 2018, KYOCERA AVX announced its complete exit from the HV doorknob capacitor market — following Murata's August 2018 exit — creating a catastrophic double supply gap. HVC Capacitor has since successfully replaced 200+ AVX models across HP, HW, and HK series, serving 500+ global customers with fully compatible HVCT8G series alternatives.
| Date | Event | Consequence |
| Aug 2018 | Murata withdraws all HV ceramic capacitors | First supply shock |
|---|---|---|
| Oct 2018 | AVX announces exit from HV doorknob market | Double supply vacuum |
| 2019 – 2024 | HVC executes massive replacement program | 200+ AVX models qualified, 500+ customers migrated |
AVX's HP (high-voltage precision), HW (standard), and HK (high-capacitance) series occupied a significant market share in:
* Medical X-ray and CT imaging equipment
* Industrial CO₂ laser power supplies
* High-voltage test and measurement instrumentation
* Scientific research particle accelerators
HVC's HVCT8G screw terminal doorknob capacitor series provides full electrical compatibility with multiple parameter improvements:
| Parameter | AVX HP/HW/HK Series | HVC HVCT8G Series | Improvement Factor |
|---|---|---|---|
| Rated Voltage Range | 15kV – 100kV DC | 10kV – 150kV DC | ✅ Full coverage + headroom |
| Capacitance Range | 500pF – 5,600pF | 280pF – 8,000pF | ✅ Wider range |
| Tolerance | ±20% (M code) standard | ±10% (K code) standard | ✅ 2x tighter tolerance |
| Dissipation Factor | 0.15% – 0.25% typical | <0.02% @ 1kHz | ✅ 10x lower losses |
| Insulation Resistance | >100 GΩ | >5,000 MΩ minimum | ✅ Superior leakage suppression |
| Partial Discharge Level | ≤5pC | ≤5pC | ✅ Equivalent |
| Dielectric Material | Strontium-based Class 2 | N4700 Class 1 (T3M) | ✅ Fundamental upgrade |
This is the most significant engineering differentiator:
| Comparison Dimension | AVX (Strontium Class 2) | HVC (N4700 Class 1) |
| Temperature Coefficient | ±15% ~ ±30% (varies by grade) | ±4.7% (stable) |
|---|---|---|
| DF Performance | 0.15% – 0.25% | <0.02% |
| Operating Temperature | -35°C ~ +85°C | -55°C ~ +125°C |
| Aging Effect | Yes (Class 2 inherent capacitance drift) | None (Class 1 characteristic) |
| Environmental Compliance | Some grades contain leaded (Y5S) | Fully lead-free (RoHS compliant) |
Medical Device Manufacturer (Vishay + Murata Dual Validation):
A European medical imaging OEM replaced Vishay 715C20KTD40 (Y5U dielectric, DF=0.7%) with HVC HVCT8G-20KV-DL60-402K (N4700 dielectric). Results:
* DF dropped from 0.7% to 0.015% (47x improvement)
* Equipment internal temperature rise decreased by 7°C
* Passed IEC 60601-1 medical safety re-certification on first submission
Industrial Laser OEM (Murata Migration):
A US-based CO₂ laser manufacturer replaced legacy Murata DHS-40K parts with HVC HVCT8G-40KV equivalents. Reported:
* 12% reduction in capacitor self-heating under continuous PFN operation
* Extended pulse-forming network maintenance interval from 6 months to 18 months
* Zero field failures over 3-year deployment period
Contact: Sales Department
Phone: +86 13689553728
Tel: +86-755-61167757
Email: sales@hv-caps.com
Add: 9B2, TianXiang Building, Tianan Cyber Park , Futian, Shenzhen, P. R. C
