component
MMBTA05
Public Made by Adomby adom
Changjing 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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README
markdownMMBTA05
Changjing · Bipolar (BJT) · SOT-23
MMBTA05 from Changjing, 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 driver transistor; the datasheet gives an emitter-base breakdown voltage of 4 V minimum (V(BR)EBO at IE=100μA) and a base-emitter voltage of 1.2 V max at VCE=1V, IC=100mA. |
| 2 | EMITTER | passive | Emitter terminal of the NPN transistor; the absolute maximum emitter-base voltage VEBO is 4 V and the maximum continuous collector current IC is 0.5 A. |
| 3 | COLLECTOR | passive | Collector terminal of the NPN transistor; the absolute maximum collector-base and collector-emitter voltages are 60 V each, with collector power dissipation PC of 300 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| 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 | 60 | V | IC= 100μA, IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | 60 | V | IC= 1mA, IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | 4 | V | IE=100μA, IC=0 | 1 | ||
| Collector cut-off current | ICBO | 0.1 | μA | VCB=60V, IE=0 | 1 | ||
| Emitter cut-off current | IEBO | 0.1 | μA | VEB=3V, IC=0 | 1 | ||
| DC current gain | hFE1 | 100 | 400 | VCE=1V, IC= 10mA | 1 | ||
| DC current gain | hFE2 | 100 | VCE=1V, IC= 100mA | 1 | |||
| Collector-emitter saturation voltage | VCE(sat) | 0.25 | V | IC=100mA, IB=10mA | 1 | ||
| Base-emitter voltage | VBE | 1.2 | V | VCE=1V, IC= 100mA | 1 | ||
| Transition frequency | fT | 100 | MHz | VCE= 2V, IC=10mA, f=100MHz | 1 | ||
| Collector-base voltage | VCBO | 60 | V | 1 | |||
| Collector-emitter voltage | VCEO | 60 | V | 1 | |||
| Emitter-base voltage | VEBO | 4 | V | 1 | |||
| Collector current -continuous | IC | 0.5 | A | 1 | |||
| Collector power dissipation | PC | 300 | mW | 1 | |||
| Junction temperature | TJ | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
MMBTA05 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbta05-etched.step/mmbta05-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbta05.step/mmbta05.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (2 pp, sha256
4edf6833fcb57bc7, retrieved 2026-10-09, 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).