component
MMBT3906 2A
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
markdownMMBT3906 2A
Changjing · Bipolar (BJT) · SOT-23
MMBT3906 2A 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 PNP transistor; the datasheet limits the emitter-base voltage (VEBO) to -5 V. |
| 2 | EMITTER | passive | Emitter terminal of the PNP transistor; the emitter-base breakdown voltage V(BR)EBO is -5 V minimum at IE = -10 μA. |
| 3 | COLLECTOR | passive | Collector terminal of the PNP transistor, rated for -0.2 A continuous collector current with a collector-emitter voltage limit (VCEO) of -40 V. |
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 | -40 | V | IC=-10μA, IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | -40 | V | IC= -1mA, IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | -5 | V | IE= -10μA, IC=0 | 1 | ||
| Collector cut-off current | ICBO | -100 | nA | VCB= -40 V, IE=0 | 1 | ||
| Collector cut-off current | ICEX | -50 | nA | VCE=-30V, VBE(off)=-3V | 1 | ||
| Emitter cut-off current | IEBO | -100 | nA | VEB= -5V, IC=0 | 1 | ||
| DC current gain | hFE1 | 100 | 300 | VCE=-1V, IC= -10mA | 1 | ||
| DC current gain | hFE2 | 60 | VCE= -1V, IC=-50mA | 1 | |||
| DC current gain | hFE3 | 30 | VCE= -1V, IC=-100mA | 1 | |||
| Collector-emitter saturation voltage | VCE(sat)1 | -0.3 | V | IC=-50mA, IB=-5mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | -0.95 | V | IC= -50mA, IB=-5mA | 1 | ||
| Transition frequency | fT | 300 | MHz | VCE=-20V,IC=-10mA,f=100MHz | 1 | ||
| Delay time | td | 35 | nS | 1 | |||
| Rise time | tr | 35 | nS | VCC=-3V,VBE=-0.5V, IC=-10mA, IB1=IB2=-1mA | 1 | ||
| Storage time | ts | 225 | nS | 1 | |||
| Fall time | tf | 75 | nS | VCC=-3V,IC=-10mA, IB1=IB2=-1mA | 1 | ||
| Collector-base voltage | VCBO | -40 | V | TA=25℃ | 1 | ||
| Collector-emitter voltage | VCEO | -40 | V | TA=25℃ | 1 | ||
| Emitter-base voltage | VEBO | -5 | V | TA=25℃ | 1 | ||
| Collector current, continuous | IC | -0.2 | A | TA=25℃ | 1 | ||
| Collector dissipation | PC | 0.2 | W | TA=25℃ | 1 | ||
| Thermal resistance junction to ambient | RθJA | 625 | ℃/W | 1 | |||
| Junction temperature | TJ | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
MMBT3906 2A - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbt3906-2a-etched.step/mmbt3906-2a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbt3906-2a.step/mmbt3906-2a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (2 pp, sha256
427549748caaec25, 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).