Kingtronics Blog

Bridge rectifiers and zener diodes are commonly used in electronic products such as computers and stereos. Bridge rectifiers are composed of a four-diode array.

These diodes convert alternating current into direct current. Bridge rectifiers have four leads, and are found in power supplies. Zener diodes are used to provide

regulated voltage for power supplies. A failure of either a bridge rectifier or zener diode prevents electronic devices from working properly.

Bridge Rectifier

• Unplug the device that contains the bridge rectifier. This ensures the bridge rectifier is without power.
• Set the digital multimeter, or DMM, to the "diode test" setting per the device's instructions.
• Test the bridge rectifier diodes. Place the DMM's two leads on two adjacent rectifier pins. The DMM will read either "OL," indicating an open circuit; or a voltage of 0.7 volts DC or less. Switch the DMM leads. An operational bridge rectifier diode shows a reading opposite of the previous reading. Perform this test on each adjacent pair of bridge rectifier pins. The bridge rectifier is faulty if the readings are the same for any of the individual diodes.

Zener Diode

• Unplug the device containing the zener diode. This ensures the zener diode has no power.
• Set the DMM to the "diode test" setting.
• Test the zener diode. Place the two DMM leads on the two zener diode leads. The DMM will read either "OL" or 0.7 volts DC. Switch the DMM leads. A working zener diode exhibits a second reading opposite of the first reading.

Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits.

When connected in parallel with a variable voltage source so that it is reverse biased, a Zener diode conducts when the voltage reaches the diode's reverse breakdown voltage.

From that point on, the relatively low impedance of the diode keeps the voltage across the diode at that value.

Zener diodes are also used in surge protectors to limit transient voltage spikes.

We have much better prices offer for below zener diode, especially BZX55C and BZV55C.

Do you have inquiry for these zener diode?

Kingtronics Zener Diode Offer:

• 1/2W BZX55C 5V6 DO-35 Bulk or Ammo RoHS
• 1/2W BZV55C 2V7 - BZV55 C47 LL-34 Tape & Reel RoHS
• 1/2W BZX55C 2V7 - 8V2 DO-35 Bulk or Ammo RoHS
• 1W 1N4729A - 1N4756A DO-41 Bulk or Ammo RoHS
• 1/2W ZMM2V4 - ZMM47 LL-34 Tape & Reel RoHS
• 1W ZM4729A - ZM4756A LL-34Tape & Reel RoHS

Diodes were the first semiconductor electronic devices.

Today most diodes are made of silicon, but other semiconductors such as germanium are sometimes used.

We kingtronics have very strong offer for diode as a ISO 9001:2008 manufacturer.

We could provide you very excellent price with good quality.

We give good support to customers, many customers highly evaluated us, they said " we never meet any problem with kingtronics products, they have extremely quality, and the delivery time always is on time Like FedEx services". So kingtronics is really your reliable supplier!

Below is our new picture for some diodes. You can see our other products by visit our website: www.kingtronics.com

Kingtronics have very good quality for radial ceramic capacitors,  have ISO 9001:2008 certification. Here some features for your reference.

Class I capacitors: A typical class I capacitor will have a temperature coefficient of 30 ppm/°C. This will typically be fairly linear with temperature. Very high accuracy (~1%) class I capacitors are available (typical ones will be 5% or 10%). The highest accuracy class 1 capacitors are designated C0G or NP0.

Class II capacitors: A typical class II capacitor may change capacitance by 15% over a −55 °C to 85 °C temperature range. A typical class II capacitor will have a dissipation factor of 2.5%. It will have average to poor accuracy (from 10% down to +20/-80%).

Class III capacitors: A typical class III capacitor will change capacitance by -22% to +56% over a temperature range of 10 °C to 55 °C. It will have a dissipation factor of 4%. It will have fairly poor accuracy (commonly, 20%, or +80/-20%). These are typically used for decoupling or in other power supply applications.

There is a three digit code printed on a ceramic capacitor specifying its value. The value is given in picofarads (pF). A letter suffix indicates the tolerance:

- Trimming Potentiometer 3296 3006 3386 3323 3329 3362 3266 3309 3590 3540 065 C3305 (SMD 3mm)...
- Diode rectifier: S1M, RS1M, SM4007 melf, BZV55C, UF4007, 1N4007S, 1N4007, 1N5399, RL207, 1N5408, 6A10, FR107, 1N4937, FR157, FR207, 1N5822....etc..
- Bridge rectifier: DB107, DB107S, MB10S, KBL410, KBU610, KBPC2510, KBPC3510, KBPC3510W......etc
- Radial ceramic capacitor cross AVX SR series, Murata RPE, Nippon THD series, Vishay K (Mono Cap ), Kemet C315-C350, Panasonics ECU-S ....
- Radial tantalum capacitor cross AVX TAP series, Kemet T350-T359, NIC NDTM, Nemco TB, Panasonic ECSF...

If you have inquiry, pls send to selina@kingtronics.cn , we will be glad to quote for you! Thank you!

Rectifier diodes (large current)

Rectifier diodes are used in power supplies to convert alternating current (AC) to direct current (DC), a process called rectification. They are also used elsewhere in circuits where a large current must pass through the diode.

All rectifier diodes are made from silicon and therefore have a forward voltage drop of 0.7V. The table shows maximum current and maximum reverse voltage for some popular rectifier diodes. The 1N4001 is suitable for most low voltage circuits with a current of less than 1A.

Do you buy Trimming Potentiometer? Come here!

Kingtronics are ISO 9001: 2008 maufacturer of Trimming Potentiometer 3296 3006 3386 3266 3590S 3329, we produce Trimming Potentiometer since 1990.

Please kindly visit our website: www.kingtronics.com, you will find our ISO certification and SGS certification on website, besides, we put Trimming Potentiometer cross guide on website.

We can provide equivalent Trimming Potentiometer of Bourns, Murata, BI Technoly, Tocos, and Vishay.

RKT-3296W        BI 67W        Murata PV36W        Tocos: J9X
RKT-3266W        BI 64W        Murata PV37W
RKT-3386P         BI 72P         Murata PV34P         Vishay 63P
RKT-3590S         Bourns 3590S

You can find complete cross list through http://www.kingtronics.com/pdf/cross-reference.pdf

As ISO 9001: 2008 manufacturer, Kingtronics produce Trimming Potentiometer since 1990.

We mainly focus on these part number: 3296 3006 3386 3266 3362 3329 3590S

Most of above are through-hole, please help me sell C3305, this is 3mm SMD trimmer.

RKT-C3305
Datasheet:http://www.kingtronics.com/trimming-potentiometers/RKT-c3305.html
Cross to:Bourns C3303 Alps: RH03ADC Citec: 3130 , Murata: PVZ3A Panasonic: EVM1SSW/X

A Zener diode is a special kind of diode which allows current to flow in the forward direction same as an ideal diode, but will also permit it to flow in the reverse direction when the voltage is above a certain value known as the breakdown voltage. A Zener diode exhibits almost the same properties, except the device is specially designed so as to have a greatly reduced breakdown voltage.

The Zener diode's operation depends on the heavy doping of its p-n junction allowing electrons to tunnel from the valence band of the p-type material to the conduction band of the n-type material.

All such diodes, regardless of breakdown voltage, are usually marketed under the umbrella term of "Zener diode".

Kingtronics have much better prices offer for below zener diode, especially BZX55C and BZV55C.

1/2W  BZV55C 2V7 - BZV55 C47    LL-34  Tape & Reel
1/2W  BZX55C 2V7 - 8V2    DO-35 Bulk or Ammo
1W   1N4729A - 1N4756A   DO-41 Bulk or Ammo
1/2W  ZMM2V4 - ZMM47    LL-34  Tape & Reel
1W   ZM4729A - ZM4756A   LL-34Tape & Reel

Please check our website www.kingtronics.com, you can download all PDF datasheet...

Zener diodes are used to maintain a fixed voltage. They are designed to 'breakdown' in a reliable and non-destructive way so that they can be used in reverse

to maintain a fixed voltage across their terminals. The diagram shows how they are connected, with a resistor in series to limit the current.

Zener diodes can be distinguished from ordinary diodes by their code and breakdown voltage which are printed on them. Zener diode codes begin BZX... or BZY...

Their breakdown voltage is printed with V in place of a decimal point, so 4V7 means 4.7V for example.
Zener diodes are rated by their breakdown voltage and maximum power:

• The minimum voltage available is 2.4V.
• Power ratings of 400mW and 1.3W are common.