component
mmbta42-rtk
Public Made by Adomby adom
KEC Semicon Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 13d ago |
| viewers | 13d ago |
| mmbta42-rtk-etched.glb | 13d ago |
| mmbta42-rtk-hero.glb | 13d ago |
| mmbta42-rtk-hero.overlay.json | 13d ago |
| mmbta42-rtk.glb | 13d ago |
| mmbta42-rtk.kicad_mod | 13d ago |
| mmbta42-rtk.kicad_sym | 13d ago |
| mmbta42-rtk.lbr | 13d ago |
| mmbta42-rtk.step | 13d ago |
| package.json | 13d ago |
| page.json | 13d ago |
| README.md | 13d ago |
MMBTA42-RTK
KEC Semicon · Bipolar (BJT) · SOT-23
MMBTA42-RTK from KEC Semicon, 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 | EMITTER | passive | Emitter of the NPN transistor; emitter-base voltage VEBO max 5.0 V and emitter current IE max -500 mA. |
| 2 | BASE | passive | Base of the NPN transistor; drive conditions in the datasheet use IB=2.0 mA for VCE(sat)/VBE(sat) at IC=20 mA. |
| 3 | COLLECTOR | passive | Collector of the NPN transistor; MMBTA42 VCBO/VCEO 300 V and collector current IC max 500 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Collector-Base Breakdown Voltage | V(BR)CBO | 300 | V | IC=100μA, IE=0 | 1 | ||
| Collector-Emitter Breakdown Voltage | V(BE)CEO | 300 | V | IC=1.0mA, IB=0 | 1 | ||
| DC Current Gain | hFE | 40 | IC=1.0mA, VCE=10V | 1 | |||
| Collector-Emitter Saturation Voltage | VCE(sat) | 0.5 | V | IC=20mA, IB=2.0mA | 1 | ||
| Base-Emitter Saturation Voltage | VBE(sat) | 0.9 | V | IC=20mA, IB=2.0mA | 1 | ||
| Transition Frequency | fT | 50 | MHz | VCE=20V, IC=10mA, f=100MHz | 1 | ||
| Collector Output Capacitance | Cob | 3 | pF | VCB=20V, IE=0, f=1MHz | 1 | ||
| Collector-Base Voltage | VCBO | 300 | V | Ta=25℃ | 1 | ||
| Collector-Emitter Voltage | VCEO | 300 | V | Ta=25℃ | 1 | ||
| Emitter-Base Voltage | VEBO | 5 | V | Ta=25℃ | 1 | ||
| Collector Current | IC | 500 | mA | Ta=25℃ | 1 | ||
| Emitter Current | IE | -500 | mA | Ta=25℃ | 1 | ||
| Collector Power Dissipation | PC | 350 | mW | Ta=25℃; package mounted on 99.5% alumina 10×8×0.6mm | 1 | ||
| Junction Temperature | Tj | 150 | ℃ | Ta=25℃ | 1 | ||
| Storage Temperature | Tstg | -55 | 150 | ℃ | Ta=25℃ | 1 |
CAD (KiCad official)
- Symbol:
MMBTA42-RTK - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbta42-rtk-etched.step/mmbta42-rtk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbta42-rtk.step/mmbta42-rtk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (2 pp, sha256
ab70af63ca748e85, retrieved 2026-10-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).