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TO 92 |
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RonieRC 
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Joined: 10 Feb 2025 Status: Offline Points: 3 |
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 Topic: TO 92Posted: 08 Aug 2025 at 2:34am |
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How does the footprint Expert calculate the location of the pads/holes in TO92? Specially the Y location. Pitch is for the X location.
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5940 |
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Posted: 08 Aug 2025 at 7:50am |
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We've been using the same pattern since the 1980s.
Pin 1 & 3 are on a 2.54 mm (0.100") grid in the x axis. The group of pins is centered in the component body to have equal distance from Pin 1 to the body and Pin 2 to the body and Pin 3 to the Body in the 'Y' axis. However, you can place the pins 'In Line' with a pin pitch of whatever you want. Either way, you're bending leads (lead forming) to fit in the holes. |
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RonieRC
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Posted: 11 Aug 2025 at 12:12am |
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Im main concern is the y location. How Foot print Expert derived it. The information we only provided is the "E,D & b" . when I check the pin location it doesnt use the E. Instead of E=1.33 ( my input) .its 1.3075 . Please clarify
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Tom H
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Posted: 11 Aug 2025 at 7:20am |
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The pins are centered under the component package.
But you can move them anywhere you want. |
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