Topdiode Blog

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Topdiode provides TVS (Transient Voltage Suppression) diodes that safeguard circuits against damage or latch-up caused by electrostatic discharge (ESD). Our devices feature low clamping voltage, low capacitance, and low leakage current.
Main features:
1. Ultra Low Capacitance
2. Low Leakage Current and Clamping Voltage
3. Low Operating Voltage
4. ROHS Compliant
Main applications:
1. High Definition Multi-Media Interface (HDMI)
2. Digital Visual Interface (DVI)
3. DisplayPortTM Interface & MDDI Ports
4. PCI Express & eSATA Interfaces
5. USB 2.0 / 3.0
6. Networking Equipment & Set Top Box
7. Notebook Computers
As for the detailed electrical characteristics, please refer to our website: www.topdiode.com

 Transient Voltage Suppression Diode (TVS   Diode)

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Topdiode tantalum capacitors factory keep some regular stocks for below capacitors, do you have interest?
 ISO 9001 & ISO 14001 manufacturer, specialized on tantalum capacitors and discrete components
 

Email: info@topdiode.com  MSN: topdiode@gmail.com   Skype: topdiode  Website:www.topdiode.com

   Topdiode  include: M7 (SMD4001-4007), S1A -S1M, RS1A - RS1M, GS1A - GS1M, LL4148, FR101-FR107, FR151-FR157, FR201-FR207, 1N4933-1N4937, 6A05-6A10, RL201-RL207, 1N5400-1N5408, 1A1-1A7, 6A05-6A10, UF4001-UF4007, UF5400-UF5408, SM4001- SM4007, 1N4001S-1N4007S, 1N4001-1N4007, 1N5391-1N5399, 1N5817-1N5819, 1N5820-1N5822, SS32 - SS320, SS12 - SS110, SM5817 -SM5819, 1N4148, 1N4148W, 1N4148WS, 1N4148WT, BZV55-SERIES, BZX55C, BZX84C, BZX85C, 1N4727A -1N4761A, ZMM1-ZMM75, ZM4728 -ZM4761.

 Email: info@topdiode.com      MSN: topdiode@gmail.com    Skype: topdiode   Website: www.topdiode.com

CA42
CA42 Radial Tantalum Capacitor is a professional grade device manufactured with a flame retardant coating and featuring low leakage current and impedance, very small physical sizes and exceptional temperature stability. It is designed and conditioned to operate to +125°C (see page 2 for voltage derating above 85°C) and is available bulk and Ammo taped for auto insertion. The 6 sizes with wide capacitance and working voltage ranges means the CA42 series can accommodate lots of applications. CA42 is a perfect replacement of AVX TAP series (please refer to Topdiode cross guide). CA42 is designed for industrial use. Military radial tantalum capacitor is available on request.
CA45
CA45 Chip Tantalum Capacitor is a general purpose SMT chip tantalum series. CA45 can replace Kemet T491, AVX TAJ, and Vishay 293D Series.
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      Silicon carbide has a high thermal conductivity and temperature has little influence on its switching and thermal characteristics. With special packaging it is possible to have operating junction temperatures of over 500 K, which allows passive radiation cooling in aerospace applications.

      The Schottky diode (named after German physicist Walter H. Schottky; also known as hot carrier diode) is a semiconductor diode with a low forward voltage drop and a very fast switching action. The cat's-whisker detectors used in the early days of wireless can be considered primitive Schottky diodes.
When current flows through a diode there is a small voltage drop across the diode terminals. A normal silicon diode has a voltage drop between 0.6–1.7 volts, while a  

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Storage of capacitors
Aluminum electrolytic capacitors

Storing aluminum electrolytic capacitors at high temperatures or in direct sunlight will cause the electrolyte within the capacitor to evaporate through the rubber end seals. The loss of electrolyte through accelerated evaporation causes the capacitance to decrease and increases in the dissipation factor, ESR and leakage current. The life expectancy of the capacitors will also be decreased. The solderability of the capacitors can also be compromised.
Do not store aluminum electrolytic capacitors in wet or humid conditions or outdoors. Storing capacitors in moist conditions can corrode the lead wires which can prevent the capacitors from soldering properly.
Storage in oil, ultraviolet ray, ozone and radiation will cause the deterioration of the rubber end seals causing the capacitors end seals weaken resulting in the reliability of the capacitors to be compromised.
Storing aluminum electrolytic capacitors should between +5°C and +40°C with 75% relative humidity and indoors.
Storing aluminum electrolytic capacitors should also be limited to 2 years after which time the capacitors should be checked for compliance to specifications. If the capacitors have any specification out of specification the capacitors can be reconditioned. After reconditioning the capacitors can be stored up to 2 additional years. Capacitors that have been stored for over 2 years after reconditioning should be scrapped and new parts should be used. 

Film capacitors
Film capacitors like aluminum electrolytic capacitors should be stored under controlled conditions to prevent any deterioration of the capacitors. Film capacitors should be stored in similar conditions to aluminum electrolytic capacitors except film capacitors can be stored for many years before they will drift out of specifications.

Email: info@topdiode.com  MSN: topdiode@gmail.com   Skype: topdiode  Website:www.topdiode.com