1amp diode can block direct short circuit?

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2000vsm

Copper - Posts: 65

Joined: June 30, 2002

Posted: July 18, 2002 at 3:16 PM / IP Logged

ok if i place a diode to do this, will it block the current? because i don't want to short out something

(+12V constant)----------------------<|--[diode]-------------------(GROUND)

will it still short circuit or blow up the diode?

the12volt

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Joined: March 07, 2002

Location: Louisiana, United States

Posted: July 18, 2002 at 4:43 PM / IP Logged

Hi 2000vsm, I'm not sure where you have the cathode side shown in your diagram, but if you have 12V+ on the cathode side and ground on the anode side, no current will flow (no short).

https://www.the12volt.com/diodes/diodes.asp

the12volt

2000vsm

Copper - Posts: 65

Joined: June 30, 2002

Posted: July 18, 2002 at 7:51 PM / IP Logged

yeah the cathode is 12v... but it's directly.. the 12volt is not going through a load.,.. just right to the diode and to ground...

go2pac

Copper - Posts: 179

Joined: May 04, 2002

Location: California, United States

Posted: July 18, 2002 at 10:42 PM / IP Logged

as long you don't reach the reverse break down voltage, then the diode won't short 12v to ground.

Karl

Pacific Accessory Corporation

Mobile Audio Interfacing Equipment

Connecting You to Your Music Since 1976

2000vsm

Copper - Posts: 65

Joined: June 30, 2002

Posted: July 19, 2002 at 11:04 AM / IP Logged

so current doesn't matter? of course it won't spike passed 400v right?? which is the reverse break down voltage i think...

it's a 1n4004 diode

2000vsm

Copper - Posts: 65

Joined: June 30, 2002

Posted: July 19, 2002 at 12:13 PM / IP Logged

can i put 2 didoes in series to get a more stronger diode?

2000vsm

Copper - Posts: 65

Joined: June 30, 2002

Posted: July 21, 2002 at 10:21 AM / IP Logged

????????????????????

Velocity Motors

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Joined: March 08, 2002

Location: Manitoba, Canada

Posted: July 21, 2002 at 10:25 PM / IP Logged

No, a diode does not get stronger when wired in parallel. Here's something to relate to what you are asking"

What's heavier a ton of feather or a tone of bricks ? " It's all relative and it you have a two 1 amp diodes in parallel, it's still only 1 amp. You must use a larger diode in order to have a greater current restriction.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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91blaze

Member - Posts: 27

Joined: May 02, 2002

Location: United States

Posted: August 05, 2002 at 12:02 AM / IP Logged

what if they were wired in parallel?

Velocity Motors

Moderator - Posts: 12,488

Joined: March 08, 2002

Location: Manitoba, Canada

Posted: August 05, 2002 at 8:00 AM / IP Logged

You CAN wire diodes in series ( sorry about that in previous post, got ahead of myself ). Just watch out that if the current flow is too high you will probably be able to see the diode glow in the dark from the heat 1amp diode can block direct short circuit? -- posted image. I put a picture of a circuit for a head light that requires diodes in series to increase amperage. These diodes are 1N4148 diodes that restrict about 100 mA of current.

1amp diode can block direct short circuit? -- posted image.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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