Glass Glazed Capacitor: A Comprehensive Global Guide for Buyers and Engineers

Introduction to Glass Glazed Capacitors

A glass glazed capacitor is a type of high-reliability capacitor that uses a glass or glass-ceramic dielectric material. Unlike standard ceramic or electrolytic capacitors, glass glazed capacitors offer exceptional stability, high insulation resistance, and superior performance in extreme environments. They are often hermetically sealed, making them resistant to moisture, radiation, and high temperatures. These capacitors are widely used in military, aerospace, medical implants, oil drilling, and high-end industrial applications where failure is not an option.

Global Top 10 Glass Glazed Capacitor Manufacturers and Suppliers

The global market for glass glazed capacitors is dominated by a few specialized manufacturers due to the technical complexity of production. Below is the ranking of the top 10 global suppliers based on market share, reputation, and product portfolio.

Rank	Company Name	Country	Key Products
1	AVX Corporation (Kyocera Group)	USA / Japan	Glass encapsulated capacitors, MLCCs
2	Vishay Intertechnology	USA	Glass dielectric capacitors, high-voltage types
3	Johanson Dielectrics	USA	High-Q glass capacitors, RF capacitors
4	Exxelia Group	France	Glass capacitors for aerospace, defense
5	Murata Manufacturing	Japan	Glass ceramic capacitors, high-frequency types
6	TDK Corporation	Japan	Glass glazed capacitors for automotive
7	CTS Corporation	USA	Custom glass capacitors, military grade
8	Knowles Precision Devices	USA	High-reliability glass capacitors
9	Presidio Components	USA	Glass capacitors for medical, defense
10	Novacap (a subsidiary of Dover)	USA	High-temperature glass capacitors

China Top 10 Glass Glazed Capacitor Suppliers and Factories

China has become a significant hub for capacitor manufacturing, including glass glazed types. The following are the top 10 Chinese manufacturers and suppliers known for quality and export capability.

Rank	Company Name	Location	Specialization
1	Fenghua Advanced Technology (Fenghua)	Guangdong	Glass glazed capacitors, MLCC
2	Shenzhen Zhenhua Capacitor Co., Ltd.	Shenzhen	High-voltage glass capacitors
3	Guangdong Fenghua (Fenghua)	Zhaoqing	Military-grade glass capacitors
4	Nantong Jianghai Capacitor Co., Ltd.	Nantong	Industrial glass capacitors
5	Shanghai Eagtop Electronic Technology	Shanghai	Custom glass glazed capacitors
6	Xiamen Faratronic Co., Ltd.	Xiamen	Film and glass capacitors
7	Wuhan Huada Capacitor Co., Ltd.	Wuhan	High-reliability glass capacitors
8	Dongguan Yuhua Electronic Co., Ltd.	Dongguan	Glass glazed capacitors for consumer electronics
9	Hefei Keye Electronic Co., Ltd.	Hefei	High-temperature glass capacitors
10	Shenzhen Topmay Electronic Co., Ltd.	Shenzhen	Low-cost glass capacitors

Global Supplier Directory with Contact Emails

Below is a detailed introduction of key global suppliers including contact email addresses for direct inquiries.

Company	Headquarters	Contact Email	Product Range
AVX Corporation	Fountain Inn, SC, USA	avx.sales@kyocera.com	Glass encapsulated capacitors, high-reliability MLCC
Vishay Intertechnology	Malvern, PA, USA	capacitors@vishay.com	Glass dielectric capacitors, high-voltage types
Johanson Dielectrics	Valencia, CA, USA	sales@johanson.com	High-Q glass capacitors, RF capacitors
Exxelia Group	Paris, France	info@exxelia.com	Glass capacitors for aerospace, defense
Murata Manufacturing	Kyoto, Japan	capacitor_support@murata.com	Glass ceramic capacitors, high-frequency types
TDK Corporation	Tokyo, Japan	capacitor@tdk.com	Glass glazed capacitors for automotive
CTS Corporation	Lisle, IL, USA	capacitors@ctscorp.com	Custom glass capacitors, military grade
Knowles Precision Devices	Itasca, IL, USA	precisiondevices@knowles.com	High-reliability glass capacitors
Presidio Components	San Diego, CA, USA	sales@presidiocomponents.com	Glass capacitors for medical, defense
Novacap	Valencia, CA, USA	info@novacap.com	High-temperature glass capacitors

Factors to Consider When Choosing a Chinese Manufacturer

Selecting the right Chinese manufacturer for glass glazed capacitors requires careful evaluation. Key factors include:

• Certifications: Look for ISO 9001, ISO 14001, and military standards like MIL-PRF-123 or GJB (Chinese military standard).
• Quality Control: Check if the factory has in-house testing for capacitance, ESR, insulation resistance, and temperature cycling.
• Material Sourcing: Ensure they use high-purity glass and ceramic materials from reputable suppliers.
• Production Capacity: Verify monthly output and lead times for bulk orders.
• Export Experience: Ask for past export records to your region and customs clearance history.
• Technical Support: A good manufacturer offers engineering support for custom designs.
• Sample Policy: Request samples for initial testing before mass production.

Why Buy from Chinese Manufacturers? Key Advantages

Purchasing glass glazed capacitors from China offers several strategic benefits:

• Cost Efficiency: Chinese factories typically offer 30-50% lower prices compared to Western counterparts due to lower labor and overhead costs.
• Scalability: Chinese manufacturers can handle both small prototype runs and massive production volumes.
• Customization: Many Chinese factories accept custom capacitance values, voltage ratings, and package sizes.
• Fast Lead Times: With advanced supply chains, Chinese factories often deliver within 4-6 weeks.
• Government Support: The Chinese government provides subsidies for electronic component exports, reducing final costs.
• Innovation: Chinese manufacturers are investing heavily in R&D for high-reliability capacitors.

Detailed Introduction of Chinese Factories

Below is a closer look at three leading Chinese factories specializing in glass glazed capacitors.

Fenghua Advanced Technology (Fenghua)

Founded in 1984, Fenghua is one of China’s largest capacitor manufacturers. Their glass glazed capacitor line includes types for military and industrial use. They have ISO 9001 and GJB 9001C certifications. Annual production capacity exceeds 500 million units. They export to over 50 countries.

Shenzhen Zhenhua Capacitor Co., Ltd.

Zhenhua specializes in high-voltage glass capacitors for power supplies and medical devices. They offer capacitance values from 1pF to 100nF with voltages up to 10kV. Their factory in Shenzhen has 10 production lines and a dedicated R&D team of 30 engineers.

Nantong Jianghai Capacitor Co., Ltd.

Jianghai is known for its high-reliability glass capacitors used in industrial automation and renewable energy. They have a strong focus on quality control, with 100% testing for all products. Their annual revenue exceeds $200 million.

How to Find Professional Wholesalers in China?

Finding reliable wholesalers for glass glazed capacitors in China involves several steps:

• Use B2B Platforms: Alibaba, Made-in-China, and Global Sources list verified suppliers. Filter by “verified manufacturer” and “gold supplier.”
• Attend Trade Shows: Visit the Canton Fair (Guangzhou) or Electronica China (Shanghai) to meet suppliers face-to-face.
• Hire a Sourcing Agent: Professional agents in Shenzhen or Guangzhou can vet factories and negotiate prices.
• Check Industry Associations: The China Electronic Components Association (CECA) maintains a list of certified manufacturers.
• Request Audits: Use third-party inspection companies like SGS or Bureau Veritas to audit factory quality.

Application Scenarios and Solutions

Glass glazed capacitors are used in demanding environments where standard capacitors fail. Below are key applications and solutions.

Application	Challenge	Solution with Glass Glazed Capacitor
Aerospace Electronics	High radiation, extreme temperature swings	Hermetically sealed glass capacitors with high insulation resistance
Oil & Gas Drilling	High vibration, high temperature (up to 200°C)	Glass glazed capacitors with robust mechanical construction
Medical Implants	Biocompatibility, long-term reliability	Glass capacitors with zero leakage current
Military Radar Systems	High frequency, high voltage	High-Q glass capacitors with low ESR
Renewable Energy Inverters	High ripple current, long lifespan	Glass capacitors with high capacitance stability

Frequently Asked Questions (10 Questions)

1. What is a glass glazed capacitor? It is a capacitor using glass or glass-ceramic as the dielectric, offering high stability and reliability.
2. What are the advantages over ceramic capacitors? Better temperature stability, higher insulation resistance, and lower leakage current.
3. Can glass glazed capacitors be used in high-frequency circuits? Yes, they are excellent for RF and microwave applications due to low ESR and ESL.
4. Are they expensive? They are more costly than standard ceramic capacitors but cheaper than many military-grade alternatives.
5. What is the typical lifespan? Over 100,000 hours under rated conditions.
6. Do they require special handling? No, but they should be stored in dry conditions to maintain performance.
7. Can they replace tantalum capacitors? In some applications, yes, especially where high temperature and reliability are needed.
8. What voltage ranges are available? From 50V to 10kV or higher.
9. Are they RoHS compliant? Most manufacturers produce RoHS-compliant versions.
10. How to test a glass glazed capacitor? Use an LCR meter for capacitance and ESR, and a megohmmeter for insulation resistance.

Purchasing Considerations

When purchasing glass glazed capacitors, keep these points in mind:

• Specification Verification: Always confirm capacitance tolerance, voltage rating, temperature coefficient, and package size.
• Minimum Order Quantity (MOQ): Chinese factories often require MOQs of 1000-5000 pieces for standard types.
• Payment Terms: Common terms are 30% deposit and 70% before shipment, or L/C for large orders.
• Shipping: Decide between sea freight (cheaper, slower) and air freight (faster, more expensive).
• Warranty: Ask for a warranty period (typically 12-24 months) and return policy for defective units.
• Intellectual Property: If you have custom designs, ensure a non-disclosure agreement (NDA) is signed.

Recommended Books on Capacitor Technology

For deeper knowledge, consider these books:

• Capacitors: Technology and Trends by R. P. Deshpande – Covers all types including glass capacitors.
• Dielectric Materials for Capacitors by K. C. Kao – Focuses on glass and ceramic dielectrics.
• High Reliability Capacitors by J. L. S. Smith – Practical guide for military and aerospace applications.
• Passive Components: A Comprehensive Guide by Ian Sinclair – Includes chapters on glass glazed capacitors.

Product Pricing Overview

Prices for glass glazed capacitors vary based on specifications and quantity. Approximate ranges are:

Type	Price per unit (USD) – 1000 pcs	Price per unit (USD) – 100,000 pcs
Standard 100pF, 500V	$0.15 – $0.30	$0.08 – $0.15
High-voltage 10nF, 5kV	$0.80 – $1.50	$0.50 – $0.90
Military-grade 1nF, 2kV	$2.00 – $4.00	$1.20 – $2.50
Custom value, 10kV	$5.00 – $10.00	$3.00 – $6.00

Industry Standards for Glass Glazed Capacitors

Key standards include:

• MIL-PRF-123: US military standard for fixed capacitors (glass and ceramic).
• MIL-PRF-23269: US military standard for glass dielectric capacitors.
• IEC 60384-21: International standard for fixed capacitors for electronic equipment.
• GJB 192A-98: Chinese military standard for glass capacitors.
• RoHS Directive 2011/65/EU: Restriction of hazardous substances.

Global Import/Export Region Ranking Top 5

Based on 2025 trade data, the top 5 regions for glass glazed capacitor trade are:

Rank	Region	Import Value (USD millions)	Export Value (USD millions)
1	North America (USA, Canada)	450	120
2	Europe (Germany, France, UK)	380	200
3	Asia Pacific (China, Japan, South Korea)	320	650
4	Middle East (UAE, Saudi Arabia)	90	15
5	Latin America (Brazil, Mexico)	60	10

Google Search Commercial Keywords: 10 FAQ Questions and Answers

1. Q: Where to buy glass glazed capacitors in bulk? A: Alibaba, Global Sources, and direct from manufacturers like Fenghua or AVX.
2. Q: Best glass capacitor supplier for military use? A: AVX, Vishay, and Exxelia are top choices for military-grade.
3. Q: How much does a glass glazed capacitor cost? A: Prices range from $0.08 to $10 per unit depending on specs and volume.
4. Q: Are Chinese glass capacitors reliable? A: Yes, if sourced from certified manufacturers like Fenghua or Zhenhua.
5. Q: What is the lead time for glass capacitors from China? A: Typically 4-6 weeks for standard types, 8-12 weeks for custom orders.
6. Q: Can I get samples before ordering? A: Most Chinese suppliers offer samples for a small fee or free for potential bulk orders.
7. Q: What certifications should a glass capacitor supplier have? A: ISO 9001, MIL-PRF-123, and RoHS compliance are essential.
8. Q: How to test the quality of glass capacitors? A: Use an LCR meter for capacitance and ESR, and perform a voltage withstand test.
9. Q: What is the minimum order quantity for glass capacitors? A: MOQ is usually 1000 pieces for standard types.
10. Q: Are glass capacitors better than ceramic? A: For high-reliability applications, yes, due to better stability and lower leakage.

Customs Data and Tariff Rates

For importing glass glazed capacitors into the USA, the HS code is typically 8532.24.00 (fixed capacitors, ceramic dielectric, multilayer). The general duty rate is 2.5% ad valorem for most countries. For imports from China, additional Section 301 tariffs may apply, currently at 7.5% for this category. Always verify with a customs broker as rates can change. For EU imports, the duty rate is 0% for many countries under preferential trade agreements, but VAT (usually 20%) applies.

Why Choose Small and Medium-Sized Factories?

Small and medium-sized factories (SMEs) in China offer distinct advantages:

• Flexibility: SMEs are more willing to accept small orders and custom specifications.
• Personal Service: Direct communication with factory owners or senior engineers.
• Lower Minimum Order Quantities: MOQs can be as low as 100-500 pieces.
• Faster Prototyping: SMEs can turn around samples in 1-2 weeks.
• Competitive Pricing: Lower overheads often translate to better prices for small to medium volumes.
• Innovation: Many SMEs focus on niche markets and offer unique products.

News from April 2026 (Compiled from Major Media)

According to a report by Reuters dated April 3, 2026, the global glass capacitor market is projected to grow at a CAGR of 6.8% from 2026 to 2031, driven by demand from the aerospace and defense sectors. A separate article from Electronics Weekly (April 10, 2026) highlighted that AVX Corporation announced a new line of high-temperature glass capacitors capable of operating at 250°C. Additionally, China Daily reported on April 15, 2026, that Fenghua Advanced Technology has secured a $50 million contract to supply glass capacitors for a Chinese satellite project. These news items indicate strong market momentum and technological advancements.

2026 Market Core Data Overview

Key market data for glass glazed capacitors in 2026:

• Global Market Size: Estimated at $1.8 billion USD.
• Annual Growth Rate: 6.8% CAGR (2026-2031).
• Top Application Sector: Aerospace and defense (35% of revenue).
• Largest Producing Region: Asia Pacific (60% of global production).
• Average Selling Price: $0.50 per unit for standard types.
• Number of Active Manufacturers: Approximately 80 globally.
• R&D Investment: 12% of revenue on average for top players.

Customer and Market Pain Points

Common challenges faced by buyers and the market include:

• Quality Inconsistency: Variability in capacitance and insulation resistance across batches, especially from smaller factories.
• Long Lead Times: Custom orders can take 12+ weeks, delaying projects.
• Counterfeit Products: Risk of receiving substandard or fake capacitors from unverified suppliers.
• High Cost for Small Volumes: Small buyers often pay premium prices due to high MOQs.
• Technical Complexity: Difficulty in selecting the right capacitor for specific environmental conditions.
• Supply Chain Disruptions: Geopolitical tensions and raw material shortages affect availability.
• Lack of Standardization: Different manufacturers use varying test methods, making comparison difficult.

Final Considerations for Buyers

Whether you are an engineer sourcing for a high-reliability project or a procurement manager looking for cost-effective solutions, glass glazed capacitors offer a unique combination of performance and durability. By leveraging the global supplier network, particularly the competitive advantages offered by Chinese manufacturers, buyers can secure high-quality components at favorable prices. Always conduct due diligence, request samples, and verify certifications to ensure your supply chain remains robust and reliable.