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

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{ "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "How does HVC solve the AVX exit crisis for high voltage doorknob capacitors?", "acceptedAnswer": { "@type": "Answer", "text": "Since AVX's Oct 2018 exit from HV doorknob market (following Murata's Aug 2018 exit), HVC has successfully replaced 200+ AVX HP/HW/HK models using HVCT8G series for 500+ global customers. Key advantages: 10-150kV voltage coverage (vs AVX 15-100kV), N4700 Class 1 dielectric with DF<0.02% (vs AVX 0.15-0.25%), ±10% tolerance (vs AVX ±20%), -55°C to +125°C operating range. Proven medical device case: 47x DF reduction, 7°C temperature drop." } }] }

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