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MMBTRA102SS
Public Made by Adomby adom
ST Semtech Digital Transistors, 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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README
markdownMMBTRA102SS
ST Semtech · Digital Transistors · SOT-23
MMBTRA102SS from ST Semtech, 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) | input | Base (input) of the PNP digital transistor, connected through built-in R1 = 10 kΩ with R2 = 10 kΩ to emitter; input voltage rating -30 V, -10 V (-VI). |
| 2 | Emitter (Common) | passive | Emitter (common) of the PNP digital transistor, shared with the R2 bias resistor return. |
| 3 | Collector (Output) | output | Collector (output) of the transistor, rated for -VO of 50 V and -IO of 100 mA maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| 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 |
|---|---|---|---|---|---|---|---|
| DC Current Gain | GI | 50 | at -VO = 5 V, -IO = 10 mA | 2 | |||
| Output Cutoff Current | -IO(OFF) | 500 | nA | at -VO = 50 V | 2 | ||
| Input Current | -II | 0.88 | mA | at -VI = 5 V | 2 | ||
| Output Voltage | -VO(ON) | 0.3 | V | at -IO = 10 mA, -II = 0.5 mA | 2 | ||
| Input Voltage (ON) | -VI(ON) | 2.4 | V | at -VO = 0.2 V, -IO = 5 mA | 2 | ||
| Input Voltage (OFF) | -VI(OFF) | 1 | V | at -VO = 5 V, -IO = 0.1 mA | 2 | ||
| Output Voltage (absolute maximum) | -VO | 50 | V | 1 | |||
| Input Voltage (absolute maximum) | -VI | -10 | 30 | V | 1 | ||
| Output Current | -IO | 100 | mA | 1 | |||
| Total Power Dissipation | Ptot | 200 | mW | 1 | |||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature Range | Tstg | -55 | 150 | °C | 1 | ||
| Thermal Resistance, Junction to Ambient | RθJA | 625 | °C/W | Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout | 1 | ||
| Built-in Bias Resistor R1 | R1 | 10 | KΩ | 1 | |||
| Built-in Bias Resistor R2 | R2 | 10 | KΩ | 1 |
CAD (KiCad official)
- Symbol:
MMBTRA102SS - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbtra102ss-etched.step/mmbtra102ss-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbtra102ss.step/mmbtra102ss.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (9 pp, sha256
400c353c397e8a23, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).