TO-126

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BD135 NPN transistor in a TO-126 package.

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 and/or heatsinking.

History and origin

The JEDEC TO-126 descriptor is derived from the original full name for the package: Transistor Outline Package, Case Style 126. In the updated JEDEC outline system, the package is numbered as TO-225AA.[2]

See also

References

  1. ↑ BD135; BD137; BD139; NPN power transistors, Philips Semiconductors, 1999, retrieved 2013-12-09 
  2. ↑ AN1040/D: Mounting Considerations For Power Semiconductors, On Semiconductor, 2001, retrieved 2014-01-25 
Diode
Transistor
Single row
  • SIP / SIL
Dual row
Quad row
  • LCC
  • PLCC
  • QFN
  • QFP
  • QUIP / QUIL
Grid array
Wafer
Related topics
Note: It's relatively common to find packages that contain other components than their designated ones, such as voltage regulators in transistor packages, etc.
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