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MMBTRC402E

Public Made by Adom

by adom

ST Semtech Digital Transistors, SOT-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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MMBTRC402E

ST Semtech · Digital Transistors · SOT-523

MMBTRC402E from ST Semtech, in a SOT-523. 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 Base input Base (input) connected through R1 = 10 kΩ, with R2 = 10 kΩ to emitter; maximum input voltage VEBO is 30 V and -10 V.
2 Emitter passive Emitter (common) of the NPN transistor, connected to the R2 bias resistor, with maximum collector current IC of 100 mA.
3 Collector output Collector (output) with VCBO rating of 50 V, maximum IC of 100 mA and VCE(SAT) max of 0.3 V at IC = 10 mA.

Key specifications

Parameter Value
Manufacturer ST Semtech
Package SOT-523
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: MMBTRC402E
  • Footprint: Package_TO_SOT_SMD:SOT-523
  • 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: mmbtrc402e-etched.step / mmbtrc402e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbtrc402e.step / mmbtrc402e.glb are the bare package body.

Provenance

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

  • Datasheet: ST Semtech datasheet (9 pp, sha256 95eebcd1d9067e39, retrieved 2026-10-09, tier: lcsc)
  • 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