component

MMBTA42

Public Made by Adom

by adom

hongjiacheng Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistors-thyristorsmmbta42factory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 28d ago
viewers mmbta42: viewers · Ray 28d ago
mmbta42-etched.glb mmbta42: factory component page (tier=lcsc) · Ray 28d ago
mmbta42-etched.step mmbta42: factory component page (tier=lcsc) · Ray 28d ago
mmbta42-hero.glb mmbta42: hero GLB from the etched model (keeps the MPN mark) · Ray 28d ago
mmbta42-hero.overlay.json Publish 0.1.0 · Ray 28d ago
mmbta42.glb Publish 0.1.0 · Ray 28d ago
mmbta42.kicad_mod Publish 0.1.0 · Ray 28d ago
mmbta42.kicad_sym Publish 0.1.0 · Ray 28d ago
mmbta42.lbr Publish 0.1.0 · Ray 28d ago
mmbta42.step Publish 0.1.0 · Ray 28d ago
package.json Publish 0.1.0 · Ray 28d ago
page.json Set visibility: public · Ray 28d ago
README.md Publish 0.1.0 · Ray 28d ago

MMBTA42

hongjiacheng · Bipolar (BJT) · SOT-23

MMBTA42 from hongjiacheng, in a SOT-23. 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 input Base terminal of the NPN transistor; the datasheet limits emitter-base voltage VEBO to 5.0 V maximum and gives VBE(sat) of 0.9 V maximum at IC=20 mA, IB=2.0 mA.
2 E passive Emitter terminal of the NPN transistor; the datasheet limits emitter-base voltage VEBO to 5.0 V and collector current IC to 0.5 A.
3 C passive Collector terminal of the NPN transistor; the datasheet limits collector-emitter voltage VCEO to 300 V, collector-base voltage VCBO to 300 V, collector current IC to 0.5 A, and collector power dissipation PC to 350 mW.

Key specifications

Parameter Value
Manufacturer hongjiacheng
Package SOT-23
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: MMBTA42
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mmbta42-etched.step / mmbta42-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbta42.step / mmbta42.glb are the bare package body.

Provenance

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

  • Datasheet: hongjiacheng datasheet (3 pp, sha256 734f759be2c4599a, retrieved 2026-10-09, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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