Call:+86 13689553728 Email:sales@hv-caps.com
Adopted by Fortune 500 Companies
High Voltage Ceramic Capacitor Expert
What is the difference between single-disc and double-disc screw terminal capacitors?
HVC Capacitor offers both single-disc and double-disc configurations for its HVCT8G screw terminal high voltage ceramic capacitor line — each architecture optimized for different capacitance ranges, power handling requirements, and physical space constraints.
| Design Parameter | Single-Disc (HVCT8G-S) | Double-Disc (HVCT8G-D) | Engineering Implication |
|------------------|------------------------|------------------------|-------------------------|
| Physical Structure | One ceramic disc element | Two ceramic discs stacked in series | Double-disc doubles voltage rating |
|---|---|---|---|
| Capacitance Range | 280pF – 4,700pF | 100pF – 2,200pF | Single-disc = higher C per volume |
| Voltage Rating | 10kV – 80kV | 20kV – 150kV | Double-disc = higher V capability |
| ESR (Typical @ 1kHz) | 0.05Ω – 0.15Ω | 0.08Ω – 0.20Ω | Slightly higher ESR for double |
| ESL (Typical) | 3nH – 8nH | 5nH – 12nH | Higher ESL due to stacked structure |
| dV/dt Capability | Up to 50 kV/μs | Up to 30 kV/μs | Single-disc better for fast pulses |
| Thermal Dissipation | Better (single element) | Good (two elements share heat) | Single-disc runs cooler at high PRF |
| Footprint Diameter | Ø25mm – Ø50mm | Ø30mm – Ø60mm | Double-disc needs more PCB area |
| Application Priority | Recommended Configuration | Rationale |
|--------------------|--------------------------|-----------|
| Maximum capacitance density | Single-Disc | More C per unit volume |
|---|---|---|
| Ultra-high voltage (>80kV) | Double-Disc only | Only double-disc reaches >80kV |
| High dV/dt pulse circuits | Single-Disc | Lower ESL enables faster edges |
| Space-constrained designs | Single-Disc | Smaller footprint possible |
| Extreme reliability / redundancy | Double-Disc | Series structure provides graceful degradation margin |
* CO₂ Laser PFN Primary Tank: Typically uses single-disc HVCT8G-S (high C, moderate V, high dV/dt)
* Medical CT Scanner HV Tank: Often specifies double-disc HVCT8G-D (very high V, moderate C, safety-critical)
* Industrial X-Ray Generator: Mixed — lower-voltage stages use single-disc, final output stage uses double-disc
* Electrostatic Precipitator Filter Bank: Usually double-disc for extended voltage headroom and longevity
single disc vs double disc capacitor, screw terminal capacitor configuration, HVCT8G single double disc, high voltage capacitor architecture, dV/dt capacitor selection
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
