Ceramic gas discharge tube (GDT) is a core component for circuit lightning protection and overvoltage protection, widely used in fields such as communication, power supply, and industrial equipment. At present, the active brands in the market are mainly concentrated in Chinese Mainland and Taiwan. Combining the technical characteristics, product lines and market positioning, the following representative brands can be sorted out:
1、 Junyao Electronics (BK Electronics, Taiwan, China/Shenzhen)
Junyao Electronics is currently owned by YAGEO, a leading GDT supplier in the industry. Its products are known for their high reliability and complete specification coverage
Product features: Covering SMD surface mount and DIP direct insertion packaging, providing a 2-pole/3-pole structure, with a DC breakdown voltage coverage of 200V~3000V, and a current carrying capacity of 1kA~10kA (8/20 μ s pulse).
Representative models: such as 2RL470M6TB (470V/5kA patch), 3RP470M8SSS (three pole type), etc., with clear naming conventions and parameter identification.
Application areas: High frequency signal protection scenarios such as communication base stations, power ports, and security equipment.
2、 SOCAY Electronics (Shenzhen)
National high-tech enterprise (stock code: 839612), with technological innovation and a full range of protective devices as its advantages:
Product System:
The three main series of SMT GDT are UN1206 (0.5kA), UN1210 (1kA), and UN1812 (2kA), with voltage coverage of 90V-600V and refined packaging size (such as UN1206 only 3.2 × 1.65mm).
Simultaneously provide three pole lightning protection tubes (such as UN3E8300HP).
Technical support: Our own EMC laboratory and FAE team provide protection solution design services.
Application direction: Ethernet interfaces, xDSL devices, consumer electronics, and other scenarios that require low capacitance (usually<1.5pF).
3、 RUILON, Shenzhen
Focusing on high-performance surface mount GDT, differentiated by ultra-low capacitance and high-frequency compatibility:
Star product: 2R4S series, capacitance value<0.8pF, current flow 3kA, supports GHz level signal lines (such as 5G base stations and antenna systems).
Packaging features: Square patch (4.0 × 4.2mm), compatible with automated SMT processes.
Applicable fields: broadband equipment RS485、 Medical electronics and IEEE 802.3 standard interface.
4、 DFirst Electronics (Changzhou)
Focusing on lightning protection for high-power power supplies, we specialize in high wave and surge resistant products
Technical parameters: current carrying capacity of 20kA-1000kA (8/20 μ s), withstand voltage of 600V-1500V, suitable for 10/350 μ s lightning waveform.
Structural design: Cylindrical packaging (Φ 16mm~Φ 29.5mm), enhancing heat dissipation and flow capacity.
Typical applications: Strong current surge environments such as power equipment, industrial control systems, grounding protection modules, etc.
5、 Hanxiao Electronics (Xiaogan, Hubei)
Deeply cultivate discharge tubes for special scenarios, such as high-energy ignition and vacuum devices:
Core products: Ceramic encapsulated ignition tubes such as R12M and R50M, used in medical stone crushers, microwave equipment, etc.
Process features: Glass metal/ceramic metal sealing technology, meeting the requirements of high-pressure vacuum environment.
6、 Penang Electronics (Shenzhen)
Participants in the development of lightning protection standards, with strengths in system level protection solutions:
Product portfolio: GDT collaborates with semiconductor discharge tubes (TSS) to provide circuit optimization design for customers such as Huawei and Foxconn.
Service mode: From environmental analysis → lightning testing → scheme design → on-site optimization of the entire process support, reducing equipment repair rate.
Summary: Brand positioning and selection suggestions
|Brand | Core Advantages | Typical Scenarios|
|Junyao | Full specification coverage | Universal communication/power protection|
|Shuokai | Small size SMT and Solution Services | Consumer Electronics/Signal Ports|
|Ruilongyuan | Ultra low capacitance high-frequency characteristics | 5G/high-speed data line|
|Dingxian | Ultra high wave surge tolerance | Level 1 lightning protection for power supply/power system|
|Hanxiao | Special Vacuum/Ignition Devices | Medical/Industrial Ignition Devices|
|Penang | System level protection design | Enterprise level equipment (such as base stations/servers)|
If specific parameter selection is required (such as breakdown voltage, current value), further reference can be made to the official websites or technical manuals of various brands.