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What is the ESR (Equivalent Series Resistance) of HVC high voltage capacitors?
HVC Capacitor's high voltage ceramic capacitors demonstrate industry-leading low Equivalent Series Resistance (ESR) values — a critical parameter directly determining self-heating, efficiency, and operational lifetime in high-current and high-frequency applications.
| Product Line | Typical ESR Range | Measurement Frequency | ESR vs Competitor Advantage |
|-------------|-------------------|----------------------|----------------------------|
| HVCT8G N4700 (Doorknob) | 0.03Ω – 0.12Ω | 1 kHz | 40-60% lower than Vishay Y5U equivalent |
|---|---|---|---|
| HVCT8G N750 (HF Optimized) | 0.02Ω – 0.08Ω | 100 kHz | Lowest in class for HF operation |
| HVCD Disc (N4700) | 0.02Ω – 0.08Ω | 1 kHz | Comparable to TDK UHV, superior to SAMWHA |
| HVCD Disc (Y5U/Y5V) | 0.05Ω – 0.20Ω | 1 kHz | Competitive with major brands |
| HVCA Stacked Multi-Layer | 0.01Ω – 0.06Ω | 1 kHz | Superior to most stacked MLCC alternatives |
Self-Heating Power Calculation:
$$P_{heating} = I_{RMS}^2 \times ESR$$
| Application Scenario | RMS Current | HVC ESR | Heating Power | Competitor ESR | Competitor Heating |
|--------------------|------------|---------|--------------|----------------|-------------------|
| Laser PFN discharge (Ipk=1kA) | ~200A rms | 0.05Ω | 2,000W | 0.12Ω | 4,800W |
|---|---|---|---|---|---|
| Inverter snubber (Irms=10A) | 10A | 0.04Ω | 4W | 0.10Ω | 10W |
| RF tank circuit (Irms=5A @ 1MHz) | 5A | 0.03Ω | 0.75W | 0.08Ω | 2.0W |
Result: HVC's lower ESR reduces internal heating by 50-75%, enabling:
* Smaller heatsinks or passive cooling
* Higher operating currents without temperature derating
* Extended component lifetime (Arrhenius model: every 10°C reduction ≈ 2× life)
ESR is not constant — it varies with frequency due to skin effect and dielectric loss contributions:
| Frequency | Dominant ESR Mechanism | HVC N4700 Typical | Notes |
|-----------|----------------------|-------------------|-------|
| DC – 1 kHz | Bulk resistive (electrode/metalization) | 0.03 – 0.08Ω | Relatively stable |
| 1 kHz – 100 kHz | Dielectric contribution increases | 0.05 – 0.15Ω | Gradual rise |
| 100 kHz – 1 MHz | Skin effect dominates | 0.10 – 0.30Ω | Sharp increase above 500kHz |
| > 1 MHz | Package/lead inductance effects | Measure as impedance | Use impedance analyzer |
ESR equivalent series resistance, low ESR HV capacitor, capacitor self-heating calculation, high frequency ESR, capacitor lifetime temperature
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