component
MMBTA42Q-7-F
Public Made by Adomby adom
Diodes Incorporated 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
markdownMMBTA42Q-7-F
Diodes Incorporated · Bipolar (BJT) · SOT-23
MMBTA42Q-7-F from Diodes Incorporated, 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 of the NPN transistor; VEBO max 6.0 V, and the base-emitter saturation voltage is at most 0.9 V at IC = 20 mA, IB = 2.0 mA. |
| 2 | E | passive | Emitter of the NPN transistor; emitter-base voltage rating is 6.0 V. |
| 3 | C | passive | Collector of the NPN transistor; VCEO and VCBO are 300 V and the maximum collector current is 500 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| 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 = 100A, IE = 0 | 1 | ||
| Collector-Emitter Breakdown Voltage | V(BR)CEO | 300 | V | IC = 1.0mA, IB = 0 | 1 | ||
| Emitter-Base Breakdown Voltage | V(BR)EBO | 6 | V | IE = 100A, IC = 0 | 1 | ||
| Collector Cutoff Current | ICBO | 100 | nA | VCB = 200V, IE = 0 | 1 | ||
| DC Current Gain | hFE | 25 | IC = 1.0mA, VCE = 10V | 1 | |||
| DC Current Gain | hFE | 40 | IC = 10mA, 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 | ||
| Output Capacitance | Ccb | 3 | pF | VCB = 20V, f = 1.0MHz, IE = 0 | 1 | ||
| Current Gain-Bandwidth Product | fT | 50 | MHz | VCE = 20V, IC = 10mA, f = 100MHz | 1 | ||
| Collector-Base Voltage | VCBO | 300 | V | Maximum Ratings @ TA = 25C | 1 | ||
| Collector-Emitter Voltage | VCEO | 300 | V | Maximum Ratings @ TA = 25C | 1 | ||
| Emitter-Base Voltage | VEBO | 6 | V | Maximum Ratings @ TA = 25C | 1 | ||
| Collector Current | IC | 500 | mA | Note 1, Note 3 | 1 | ||
| Power Dissipation | Pd | 300 | mW | Note 1 (device mounted on FR-4 PCB, 1 inch x 0.85 inch x 0.062 inch) | 1 | ||
| Operating and Storage and Temperature Range | Tj, TSTG | -55 | 150 | C | 1 | ||
| Thermal Resistance, Junction to Ambient | RJA | 417 | K/W | Note 1 | 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 |
|---|---|---|---|---|
| contacts | tin | Also Available in Lead Free Plating (Matte Tin Finish). Please see Ordering Information, | 1 |
CAD (KiCad official)
- Symbol:
MMBTA42Q-7-F - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbta42q-7-f-etched.step/mmbta42q-7-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbta42q-7-f.step/mmbta42q-7-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (3 pp, sha256
01d532eee3a04713, 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).