how check diode
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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=713
Printed Date: May 04, 2025 at 2:59 AM
Topic: how check diode
Posted By: bud 13
Subject: how check diode
Date Posted: May 11, 2002 at 9:50 PM
i want to connect 2 530t's to my alram and have diodes to do so. my ? is how can i check the diodes to make sure they're 1 ampere the only thing on the diodes are a bunch of numbers as follows MSC 9432, BELOW THAT, MSP 845.
Replies:
Posted By: HotRod53F100
Date Posted: May 12, 2002 at 2:29 PM
I looked in the information that I have and I could not find a listing for those numbers. My suggestion would be go to Radio Shack and buy a couple of the correct rating to be sure. They're cheap enough that I would buy new ones to be sure. If you go with an 1N4002, which are extrenely common, they will give you a 1A capacity. Personally, I would go bigger to be sure.
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HotRod
Posted By: bud 13
Date Posted: May 12, 2002 at 5:26 PM
hotrod
how big should i go? 2amp, 3amp? if so what would be the benefit.
Posted By: HotRod53F100
Date Posted: May 12, 2002 at 6:48 PM
Pardon my ignorance, but I'm not sure what 530T's are...here's the rule of thumb, if you know that you are going to draw 1 Amp, you should size for 2X your draw+10%. The same rule applies for sizing a fuse. That would put you around 2-3 Amps. If your only using diodes for isolation between circuits which I am assuming that you are doing from your description, going too big will never hurt you. The voltage drop across a diode is the same no matter what the current. The diode isn't meant to be a fuse, so going big won't hurt, thas what the fuse is for. Give me some more details on what you are working with and maybe I can guide you a little better.
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HotRod
Posted By: bud 13
Date Posted: May 12, 2002 at 9:11 PM
hot rod
the 530t's are the window modules from DEI, they allow you to control the windows when the alarm is armmed,i.e you can lower them, raise them(if connected to an aux channel) and vent them about two inches.
Posted By: Big Dog
Date Posted: May 14, 2002 at 2:07 PM
Hey Bud, Maybe I missed the beginning of this string somewhere else but why do you need to add diodes to your modules? The only reason would be to isolate the orange wire from a starter kill. For that purpose one amp is plenty as it only draws 200ma. ------------- Prepare your future. It wasn't the lack of stones that killed the stone age.
Posted By: NyxBass
Date Posted: May 16, 2002 at 11:55 PM
"The same rule applies for sizing a fuse. " NO! Please, everyone, a fuse is to protect the wire! It's size is determined by the length of your wire and the wire's size. It's the wire's size that is determined by the power draw. I just don't want to see anyone's ride burn from a bad fusing job. Please be careful with fusing! Do it correctly and be safe, save yourself a hassle! ------------- /NyxBass
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