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3DD4242DM-126

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Jilin Sino-Microelectronics Bipolar Transistors - BJT, TO-126. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3dd4242dm-126-etched.step 3dd4242dm-126: factory component page (tier=lcsc) · Ray 21h ago
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3DD4242DM-126

Jilin Sino-Microelectronics · Bipolar Transistors - BJT · TO-126

3DD4242DM-126 from Jilin Sino-Microelectronics, in a TO-126. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 B passive Base of the NPN transistor; the emitter-base voltage VEBO is limited to 9 V.
2 C passive Collector; VCEO is 400 V (IB=0) and VCES is 700 V (VBE=0), with DC collector current IC up to 1.5 A and pulse ICP up to 3.0 A.
3 E passive Emitter of the NPN transistor; VEBO is limited to 9 V.

Key specifications

Parameter Value
Manufacturer Jilin Sino-Microelectronics
Package TO-126
Category Transistors
Pins 3

CAD (KiCad official)

  • Symbol: 3DD4242DM-126
  • Footprint: Package_TO_SOT_THT:TO-126-3_Vertical
  • 3D model: TO-126 (KiCad packages3D, STEP)
  • 3D model files: 3dd4242dm-126-etched.step / 3dd4242dm-126-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 3dd4242dm-126.step / 3dd4242dm-126.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Jilin Sino-Microelectronics datasheet (9 pp, sha256 d1634e2289b1e56e, retrieved 2026-10-28, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF