transistor help

Aug 21, 2006 2 Replies
I

Hello,



I have a home irrigation controller hat has gone faulty on one of the zones, I have opened it up and have found one of the transistors to be faulty there is a number on the transistor but it looks like its a part number from the manufacturer of the irrigation unit rather then the actual part number of the transistor.



The number written on it is 1401ES or 1401E5 cant make out if its a 5 or an S but looks like an S to me and sound like it might be an NPN transistor.



The purpose of this transiston from what I can tell from the board is to turn a solenoid on and off.



The Irrigation unit is made by Holman Distributors.



Any help you can provide would be greatly appreciated.



Thanks Imran Khan


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J

Yes, I seem to have read that before:

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Here's how you should have done it:

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*-*-*-*-*-*-*-*-appear+*-proper-answer-*-*-*-given+much-easier-*-*-*-*-what's-going-on+*-frowned-on+*-correcting+*-polite-*-mention-*-*-*-*-*-*-*+*-*-_perfect_-*-*-*-*+*-Followup-To-*+*-*-*-too-lazy-*-*-*-*-*-appropriate-*+Just-because-*-*-*-*-*-*-*-*-does-not-mean-*-*-*-*-*-*+*-*-*-*-two-groups-*-*-aren't-*-different

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J

those things are often AC, are you certain it's not a triac?

If you can tell the current and voltage the solenoid operates at that would help. (or the current output of the power supply for the irigation unit...)

that's a novel name for a manufacturer.

Bye. Jasen

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