High-frequency amplifiers, e.g. antenna amplifiers, FM- VHF-, UHF-tuners and oscillators are mostly built into metal housings in order to avoid spurious radiaton. For insertion of the current lines into the metal housing STELCO offers ceramic feedthrough capacitors in many different styles.

High-integrated components and electronic circuits are very susceptible to malfunction due to electro-magnetic interference. Therefore more and more comprehensive measures to suppress interference voltages are necessary. An effective method to intercept these interferences is e.g. the application of connectors with feedthrough capacitors styles DEEQ and BEEQ.

Standards and Capacitor Ceramics - 6 pages PDF-document

Measuring and test conditions - 4 pages PDF-document

 Data sheet

The most important properties of the SUMIDA-feedthrough capacitor programme are the following:

• wide capacitance range
• low self-inductance
• high attenuation for frequencies up to 3 GHz
• extensive style programme
• smallest dimensions
• resistibility to voltage impulses

series with lead wire:
BDBQ 3-10 (2709)
BUBQ 5-00, BDBQ 5-02, BDBQ 5-00 (2701)
LUEQ 6-01, LDEQ 6-01 (2703)
DDMN 1,7-00 (2706)
DDMZ 3-00 (2705)

series without lead wire:
BEEQ 3-01 (2709)
BEBQ 5-00, BEEQ 5-00 (2701)
BEBQ 6-00, BEEQ 6-00 (2702)
LEEQ 6-00 (2704)

 Data sheet

Pi-filters contain two capacitive and one inductive element resulting in low impedance to primary and secondary side (source and load). Using these 3 elements a better high frequency performance is obtained than with pure L/C combinations.

Pi-filters are available in 2 styles:

• BDMN 2,6 - with M4-thread
• BDNN 2,6 - for assembling by soldering