What is the CIV (Capacitance-Voltage-Impedance) characteristic of HVC capacitors?

CIV (Capacitance-Voltage-Impedance) characteristics describe how a capacitor's electrical behavior changes under varying operating conditions — critical for precision applications:

Parameter	N4700 Material Behavior	Y5U/Y5V Material Behavior

|-----------|------------------------|--------------------------|

C vs DC Bias Voltage	< ±1% change up to rated V	-20% to -80% change (severe!)
C vs AC Voltage Amplitude	< ±0.5% variation	±5% to ±15% variation
Impedance vs Frequency	Stable to 100kHz, gradual rise above	Strong frequency dependence
Temperature Coefficient (α)	NP0-type: ±30ppm/°C typical	High-K: -3300 to -5600ppm/°C

Key Takeaway: For applications requiring stable capacitance under bias voltage variations (filtering, timing, resonant circuits), N4700 material is essential. Y5U/Y5V materials exhibit severe capacitance drop when biased near their rated voltage — a frequently overlooked failure mode in designs migrated from Class 1 to Class 2 dielectrics.

HVC provides full CIV characterization curves in datasheets upon request for engineering evaluation.

CIV characteristic, capacitance voltage impedance curve, DC bias effect, N4700 vs Y5U stability, dielectric voltage coefficient

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civ-capacitance-voltage-impedance-characteristic-hvc

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{ "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "What is the CIV characteristic of HVC capacitors?", "acceptedAnswer": { "@type": "Answer", "text": "N4700: C vs DC bias<±1% to rated V, C vs AC amp<±0.5%, Z stable to 100kHz, α=±30ppm/°C(NP0). Y5U/Y5V: C drops -20%~-80% at bias(strong), C varies ±5-15% with AC, strong freq dep, α=-3300~ -5600ppm/°C. Key: for stable C under bias(timing/filtering/resonant), N4700 essential. Y5U/Y5V severe C drop at rated V = overlooked fail mode. Full curves on request." } }] }

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