component
MMBTSD123
Public Made by Adomby adom
YFW Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownMMBTSD123
YFW · Bipolar (BJT) · SOT-23
MMBTSD123 from YFW, 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 | Base | input | Base terminal of the NPN transistor; the datasheet gives drive only as IB = 50 mA with IC = 500 mA in the VCE(sat) test condition. |
| 2 | Emitter | passive | Emitter terminal of the NPN transistor, rated for an Emitter Base Voltage VEBO of 6.5 V. |
| 3 | Collector | passive | Collector terminal rated for Collector Base Voltage VCBO of 20 V, Collector Emitter Voltage VCEO of 15 V and Collector Current IC of 1 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| 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 Voltage | VCBO | 20 | V | 1 | |||
| Collector Emitter Voltage | VCEO | 15 | V | 1 | |||
| Emitter Base Voltage | VEBO | 6.5 | V | 1 | |||
| Collector Current | IC | 1 | A | 1 | |||
| Power Dissipation | Ptot | 200 | mW | 1 | |||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature Range | TS | -55 | 150 | °C | 1 | ||
| DC Current Gain | hFE | 150 | - | at VCE = 1 V, IC = 100 mA | 1 | ||
| Collector Cutoff Current | ICBO | 100 | nA | at VCB = 20 V | 1 | ||
| Emitter Cutoff Current | IEBO | 100 | nA | at VEB = 6 V | 1 | ||
| Collector Base Breakdown Voltage | V(BR)CBO | 20 | V | at IC = 50 µA | 1 | ||
| Collector Emitter Breakdown Voltage | V(BR)CEO | 15 | V | at IC = 1 mA | 1 | ||
| Emitter Base Breakdown Voltage | V(BR)EBO | 6.5 | V | at IE = 50 µA | 1 | ||
| Collector Emitter Saturation Voltage | VCE(sat) | 0.3 | V | at IC = 500 mA, IB = 50 mA | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | Abs | SOT-23 Plastic Package Absolute Maximum Ratings (Ta = 25 O | 1 |
CAD (KiCad official)
- Symbol:
MMBTSD123 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbtsd123-etched.step/mmbtsd123-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbtsd123.step/mmbtsd123.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YFW datasheet (3 pp, sha256
91035d66ed154bb7, retrieved 2026-10-28, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).