(Technical White Paper: HVC RF Power Capacitors as Strategic Alternatives to HEC & Vishay)

1. Abstract

In RF power matching networks, medical MRI coils, and semiconductor plasma generators, the selection of ceramic capacitors directly determines the system's power transfer efficiency and thermal stability. This white paper aims to explain how HVC Capacitor's HVCHF Series precisely covers the product lines of HEC (High Energy Corp) and Vishay (Draloric/TOS) through differentiated dielectric material technology.

This document follows the logic of "indexing alternatives by original manufacturer part number," focusing on providing detailed cross-reference tables for 7.5kV (Series A) and 15kV (Series B), helping you quickly identify HVC alternative models based on existing HEC/Vishay part numbers.

2. Dielectric Classification

To ensure accurate substitution, it is essential to first clarify the meaning of different dielectric codes from HEC and Vishay. HVC's dielectric formulations strictly align with these international standard codes:

2.1 Class I: High Frequency Resonant

Features: Extremely low dielectric loss (tan δ < 0.0006), extremely high Q value, no piezoelectric effect. Applications: 13.56MHz / 27.12MHz RF matching networks, LC resonant circuits.

2.2 Class II: High Capacitance

Features: High dielectric constant (High K), achieving large capacitance in a smaller volume, but with slightly higher loss than Class I. Applications: DC Blocking, Bypass, Coupling.

3. Cross Reference

Cross-reference data from HVC official product page. See complete tables at the end.

3.1 Series A: 7.5kV (Φ20mm)

For HEC HT50/HT58/HH58 and Vishay 7FAA/7FAU/5FAE/TOS 020016.

3.2 Series B: 15kV (Φ30mm)

For HEC HT57/HT59/HH57 and Vishay TOS 030033.

4. How to Select

Select appropriate dielectric based on application:

• High-frequency resonant: Choose NP0 or N750 dielectric.
• DC blocking/coupling: Choose N4700 high-K dielectric.

5. Conclusion

HVC HVCHF series provides RF engineers with a clear alternative path. HVC ensures your RF supply chain security with faster delivery and reliable quality.

6. Complete Cross Reference

6.1 HEC HT50 Series → HVC Alternative (7.5kV, Φ20mm)

6.2 HEC HT58 Series → HVC Alternative (7.5kV, Φ20mm)

6.3 HEC HT57 / HH57 Series → HVC Alternative (15kV, Φ30mm)

6.4 HEC HT59 Series → HVC Alternative (25kV, Φ58mm)

6.5 Vishay 7FAA / 7FAU / 5FAE Series → HVC Alternative

6.6 Vishay TOS 030033 Series → HVC Alternative (15kV, Φ30mm)

6.7 Vishay TOS 020016 Series → HVC Alternative (7.5kV, Φ21mm)

Contact & Technical Support