High Voltage Mica Capacitors

Teledyne Reynolds UK High Voltage Mica Capacitors are engineered for high-reliability energy storage, filtering and pulsed-power circuits where long-term stability and environmental robustness are critical. Built with hermetically sealed ceramic-to-metal brazed construction, these capacitors are designed to maintain consistent electrical performance in harsh conditions, supporting aerospace and defence systems as well as scientific and industrial high-voltage equipment. :contentReference[oaicite:0]{index=0}

Mica-based dielectric construction is valued for stable capacitance, low losses and dependable insulation behaviour at elevated voltages. In practical system terms, that means predictable timing and pulse performance, efficient energy transfer, and reduced risk of moisture-related degradation over the service life of the equipment.

Key features

• Voltage ratings across the portfolio from 3 kVDC to 13 kVDC (WVDC)
• Capacitance range from 100 pF to 10 µF with tight tolerances
• Hermetically sealed ceramic-to-metal brazed construction to protect against moisture and contamination
• Low ESR for efficient energy transfer in pulse and discharge applications
• Operating temperature -55°C to +125°C with minimal capacitance drift
• Low dielectric absorption and low leakage characteristics

(Feature set as published for this product page.) :contentReference[oaicite:1]{index=1}

Benefits for high-energy and high-voltage designs

• Exceptional long-term capacitance stability for predictable circuit behaviour
• Hermetic sealing helps prevent moisture ingress, contamination and outgassing
• High reliability compared with electrolytic alternatives in demanding programmes
• Consistent performance across wide temperature and altitude ranges
• Precise electrical characteristics for critical timing and pulse circuits
• Certified quality systems supporting controlled manufacture and traceability

(Benefits as published for this product page.) :contentReference[oaicite:2]{index=2}

Typical applications

These high voltage mica capacitors are commonly specified where stable energy storage and dependable insulation performance are required, including:

• Electronic safe and arm devices for ordnance systems
• Capacitor discharge unit (CDU) energy storage
• High-voltage power supply filtering and energy storage
• Pulse generation and timing circuits
• Missile guidance and avionics systems
• High-energy physics and scientific instrumentation

(Applications as published for this product page.) :contentReference[oaicite:3]{index=3}

Specifications overview

• Voltage range: 3 kVDC to 13 kVDC (depending on configuration)
• Capacitance range: 100 pF to 10 µF standard (custom values available)
• Operating temperature: -55°C to +125°C
• Dielectric: mica paper with hermetically sealed housing
• Construction: ceramic-to-metal brazed hermetic sealing
• Quality standards: AS9100D, ISO 9001:2015, MIL-PRF-49469 compliant

(Specifications as published for this product page.) :contentReference[oaicite:4]{index=4}

Related links: High Voltage Mica Capacitors  |  High Energy Devices category  |  Reynolds UK overview

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Frequently Asked Questions

1) What makes a mica capacitor suitable for high-voltage, high-energy designs?

Mica dielectric construction is valued for stable capacitance and dependable insulation behaviour under electrical stress. For high-voltage and pulsed-power designs, that stability helps maintain predictable timing, repeatable pulse performance and reliable energy storage over long service life.

2) Why does hermetic sealing matter in high-voltage capacitors?

Hermetic sealing helps protect the dielectric system from moisture, contamination and outgassing. In real-world equipment, that typically improves reliability and reduces performance drift in harsh environments and long-duration deployments. :contentReference[oaicite:5]{index=5}

3) What information do you need to recommend the right capacitor?

The quickest route is: working voltage (including transients), target capacitance and tolerance, temperature range, pulse profile (if applicable), repetition rate/expected life cycles, and any mechanical constraints (mounting, clearances and terminations).

4) Are these capacitors intended for pulsed-power or continuous HV operation?

They are used in both contexts—high-voltage filtering/energy storage in power supplies, and pulse generation, timing and capacitor discharge applications. Selection depends on the duty cycle and pulse stress (peak current, pulse width and repetition rate). :contentReference[oaicite:6]{index=6}

5) How should I think about voltage derating for high-reliability programmes?

Many high-reliability designs apply derating to account for transients, tolerances, ageing and environmental factors. The best derating approach depends on whether your use case is DC filtering/energy storage or pulsed discharge, plus your programme’s qualification requirements.

6) What’s the advantage of low ESR in these capacitors?

Low ESR supports efficient energy transfer and helps reduce internal heating under pulse or ripple conditions. That’s particularly important in capacitor discharge units and pulse circuits where current peaks can be significant. :contentReference[oaicite:7]{index=7}

7) What standards are associated with these capacitors?

The published product information references AS9100D and ISO 9001:2015 quality systems and notes MIL-PRF-49469 compliance. Always confirm the exact compliance and documentation package needed for your specific programme. :contentReference[oaicite:8]{index=8}

8) Do you support custom values or configurations?

Yes—custom capacitance values and configurations may be available depending on the requirement. Share your electrical envelope and mechanical constraints, and we can advise on feasible options. :contentReference[oaicite:9]{index=9} ​