TO-126

TO-126 is a type of semiconductor package for devices with three pins, such as transistors.[1] The package is rectangular with a hole in the middle to allow for easy mounting to a board or a heat sink.

BD135 NPN transistor in a TO-126 package.

STMicroelectronics refers to this package style as SOT-32.[2]

History and origin

The JEDEC TO-126 descriptor is derived from the original full name for the package: Transistor Outline Package, Case Style 126.[3] In the updated JEDEC outline system, the package is numbered as TO-225AA.[4]

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gollark: I think it technically has its own, for the teletext chars and stuff.
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See also

References
  1. BD135; BD137; BD139; NPN power transistors (PDF), Philips Semiconductors, 1999, retrieved 2013-12-09
  2. MJE340 MJE350 Complementary silicon power transistors (PDF), STMicroelectronics
  3. "JEDEC TO-126 package specification" (PDF). JEDEC. May 1968. Archived from the original (PDF) on June 18, 2017.
  4. AN1040/D: Mounting Considerations For Power Semiconductors (PDF), On Semiconductor, 2001, retrieved 2014-01-25


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