How to read Zener Diode Code



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Summary:
If you are
unable to identify the code, do not worry as this newsletter are here to guide you to
successfully on how to read the zener diode code.

5.1=5.1Volt zener diode

5V1=5.1Volt zener diode

12= 12 Volt zener diode

12V= 12 Volt zener diode

BZX85C22=22Volt 1 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE)

BZY85C22=22Volt 1/2 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE)

Note: There is also part number such as BZVXXXXX where you have to find it from ECG SEMICONDUCTOR BOOK.
Article:
Many technicians are confused on how to really read a zener diode code. There are many
types of code number indicated on it's body. The look and shape of a zener diode sometimes
can be mistaken to be a normal signal diode. To differentiate it, is by looking at the code
number on it's body- whether it is a normal diode or zener diode. Thanks to the manufacturers
where their main apron stage are printed with the word 'ZD' which referred to zener diode and 'D'
means a diode.
However, from my experienced some printed pulse care for the marking of 'D' also can represent
zener diode. This will misled a technician into prayerful a zener diode is truly a diode. We
as a technician or engineer must know or be sensitive carelessly the marking.
The only way to find out is by referring the code number printed on the component's body from a
semiconductor data book. Without data book it is quite difficult to know the ordinary zener diode
voltage. If you do not have the data book you may go to google search engine and type the
following code and hope you can find the reach there! A wrong substitution of zener diode may
caused your equipment to malfunction and sometimes will even blow your equipment. Time and money
are loss due to that we lack of knowledge of identify the right zener diode voltage. If you are
unable to identify the code, do not worry as this newsletter are here to guide you to
successfully on how to read the zener diode code.

5.1=5.1Volt zener diode

5V1=5.1Volt zener diode

12= 12 Volt zener diode

12V= 12 Volt zener diode

BZX85C22=22Volt 1 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE)

BZY85C22=22Volt 1/2 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE)

Note: There is also part number such as BZVXXXXX where you have to find it from ECG SEMICONDUCTOR BOOK.

1N4746= 18 Volt 1 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE)

6C2=6.2 Volt zener diode. (If you look at the zener diode code it is written as 6C2 READING FROM TOP TO BOTTOM)
Don't read from meadow to top otherwise the value you get is 2C6 which you cannot find from data book!

I take stock in many will ask how do I get the voltage for the code of 6C2. Still refer to ECG book, you
have to search for HZ part number. That's mean instead of finding 6C2, search for HZ6C2 and you
will get the answer! The lowest zener voltage that I came biased was 2.4 volt and the highest was
200 Volt 5 watt.

Conclusion- Be animated when service the part number of a zener diode. Don't everlastingly fancy that a small signal diode
is unendingly a zener diode. guardedly observe the marking on the main victuals and read the zener diode part number
refer to the semiconductor book, preferably ECG SEMICONDUCTOR DATA BOOK which you can get from your
local electronic distributor. With this knowledge in mind, you will be successfully find the right voltage
of a zener diode.



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