What type of diode is this?

[rebelroxy]

Hey all....I have this diode and on it says 27. Need to know if its 27volt and how many watts?

thanks

 

[rob_croxford]

Its a Zener diode. Where did it come from - letting us know this should allow us to tell you more of its use and hopefully its rating.

 

[rebelroxy]

It came from a 24 volt power supply. 110/230 VAC 2.2/1.0 A 50/60 HZ

 

[rebelroxy]

So what does the number 27 mean thats written on it?

 

[rob_croxford]

oh sorry i did not see this properly. Ok the Number written on it will denote its breakdown voltage, in this case 27V

Please ignore previous posts.

 

[rebelroxy]

ok cool. how do I know the wattage? I've seen 1 watt and 10 watt....

 

[rob_croxford]

this should do the trick -

http://cgi.ebay.co.uk/10-27v-Zener-diode-27-volt-1-3W-DO41-ROHS-BZX85C-v-/220515859680

27V - 1.3W

 

[rebelroxy]

thank you. that should work.

 

[TBennettcc]

...so how did you know it was a Zener diode?

 

[davenn]

...so how did you know it was a Zener diode?

my thoughts exactly, the 27 could mean just about anything. a big assumption to just say ... its a zener

one would really have to see the cct diag and where its placed in the cct

Dave

 

[Resqueline]

Hehe.. Dave does have some valid points but I'm with Rob here, tough I'd settle for it being a 400mW zener. I guess you can chalk it up to experience/recognition..

 

[rob_croxford]

As Resqueline says my conclusion was drawn by recognition and intuitian - i believed the OP wanted a quik fix as opposed to an explanation.

Oh and davenn the number written on a diode (as far as i have ever known) represents the breakdown voltage of that diode which for a 24V power supply 27 volts seems quite approproiate.

Cheers

 

[davenn]

hahahahaa you may only be seeing 1/2 the number its that damn blurry

worth a shot tho

I just think of the 100's of zeners that I have in stock that dont show any voltage rating.
the OP will soon find out soon enough if it works or not

without further info I will bow to your intuition

D

 

[davenn]

hey Res, can I have a party when I roll over the big 1000 ??

D

 

[rebelroxy]

I got lucky...on the board it says ZD2....short for zener diode number 2.

 

[rebelroxy]

oh ya....it did work fine...thanks everyone.

 

[davenn]

excellent good to hear

 

[rob_croxford]

good news - intuition can go a long way