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Old 31st October 2010, 08:25 PM   #1
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Join Date: Dec 2004
Location: Cambridge, MA
Default High Idss 2SK170GR?

I measured a bunch of 2SK170GR for Idss this afternoon and am a little puzzled. First, I am an electronics novice, so please forgive my ignorance.

My milliammeter has blown its fuse and I do not have a replacement in stock yet. So I decided to measure the voltage across a 100R resistor between the positive terminal of a 9V battery and the drain. I shorted the gate and source and connected them to the negative battery terminal.

My voltage readings across the resistor were in the 0.3 - 1.3V range, suggesting an IDss of 3 - 13 mA, with most clustering around 12-13 mA. This is pretty out of range for GR parts. Is there something wrong with my technique, my parts, or does Toshiba play a little fast and loose with their parts labeling?

(my first post)
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Old 31st October 2010, 08:50 PM   #2
Piersma is offline Piersma  Netherlands
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Default Counterfeit

Are you sure that the SK170GR are genuine Toshiba parts?
Genuine Toshiba parts are within specs, no doubt.

There are a lot of counterfeiting parts supplied these days.....
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Old 31st October 2010, 11:40 PM   #3
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Location: Cambridge, MA
I have no certainty that these parts are genuine toshiba. I bought them from futurlec a few months ago. They look like any other 2sk170 I have used in the past, but who knows. It may be worth following up with futurlec Thanks for your response.

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