component
2SA73
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UMW Bipolar Transistors - BJT, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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2SA73
UMW · Bipolar Transistors - BJT · SOT-23
2SA73 from UMW, 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 terminal of the 2SA73 PNP transistor in the SOT-23 package. |
| 2 | E | passive | EMITTER terminal of the 2SA73 PNP transistor in the SOT-23 package. |
| 3 | C | passive | COLLECTOR terminal of the 2SA73 PNP transistor in the SOT-23 package; the datasheet rates collector-base voltage at -60 V and collector current at -150 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-23 |
| Category | Transistors |
| 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 | -60 | V | 1 | |||
| Collector-Emitter Voltage | VCEO | -50 | V | 1 | |||
| Emitter-Base Voltage | VEBO | -5 | V | 1 | |||
| Collector Current | IC | -150 | mA | 1 | |||
| Collector Power Dissipation | PC | 200 | mW | 1 | |||
| Thermal Resistance From Junction To Ambient | RθJA | 625 | °C/W | 1 | |||
| Junction Temperature | TJ | 150 | °C | 1 | |||
| Storage Temperature | TSTG | -55 | 150 | °C | 1 | ||
| Collector-base breakdown voltage | V(BR)CBO | -60 | V | IC=-5μA, IE=0 | 2 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | -50 | V | IC=-1mA, IB=0 | 2 | ||
| Emitter-base breakdown voltage | V(BR)EBO | -5 | V | IE=-50μA, IC=0 | 2 | ||
| Collector cut-off current | ICBO | -0.1 | μA | VCB=-60V, IE=0 | 2 | ||
| Emitter cut-off current | IEBO | -0.1 | μA | VCB=-5V, IE=0 | 2 | ||
| DC current gain | hFE | 120 | 475 | VCE=-6V, IC=-1mA | 2 | ||
| Collector-emitter saturation voltage | VCE(sat) | -0.3 | V | IC=-100mA, IB=-10mA | 2 | ||
| Collector Output Capacitance | Cob | 4.5 | 7 | pf | VCE=-10V, IE=0, f=1MHz | 2 |
CAD (KiCad official)
- Symbol:
2SA73 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
2sa73-etched.step/2sa73-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);2sa73.step/2sa73.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (6 pp, sha256
3c3df1d77355024c, retrieved 2026-10-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed (audit)), 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).
# 2SA73
**UMW** · Bipolar Transistors - BJT · SOT-23
2SA73 from UMW, 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 terminal of the 2SA73 PNP transistor in the SOT-23 package. |
| 2 | E | passive | EMITTER terminal of the 2SA73 PNP transistor in the SOT-23 package. |
| 3 | C | passive | COLLECTOR terminal of the 2SA73 PNP transistor in the SOT-23 package; the datasheet rates collector-base voltage at -60 V and collector current at -150 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-23 |
| Category | Transistors |
| 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 | | | -60 | V | | 1 |
| Collector-Emitter Voltage | VCEO | | | -50 | V | | 1 |
| Emitter-Base Voltage | VEBO | | | -5 | V | | 1 |
| Collector Current | IC | | | -150 | mA | | 1 |
| Collector Power Dissipation | PC | | | 200 | mW | | 1 |
| Thermal Resistance From Junction To Ambient | RθJA | | | 625 | °C/W | | 1 |
| Junction Temperature | TJ | | | 150 | °C | | 1 |
| Storage Temperature | TSTG | -55 | | 150 | °C | | 1 |
| Collector-base breakdown voltage | V(BR)CBO | -60 | | | V | IC=-5μA, IE=0 | 2 |
| Collector-emitter breakdown voltage | V(BR)CEO | -50 | | | V | IC=-1mA, IB=0 | 2 |
| Emitter-base breakdown voltage | V(BR)EBO | -5 | | | V | IE=-50μA, IC=0 | 2 |
| Collector cut-off current | ICBO | | | -0.1 | μA | VCB=-60V, IE=0 | 2 |
| Emitter cut-off current | IEBO | | | -0.1 | μA | VCB=-5V, IE=0 | 2 |
| DC current gain | hFE | 120 | | 475 | | VCE=-6V, IC=-1mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) | | | -0.3 | V | IC=-100mA, IB=-10mA | 2 |
| Collector Output Capacitance | Cob | | 4.5 | 7 | pf | VCE=-10V, IE=0, f=1MHz | 2 |
## CAD (KiCad official)
- Symbol: `2SA73`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `2sa73-etched.step` / `2sa73-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sa73.step` / `2sa73.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [UMW datasheet](docs/2sa73-datasheet.pdf) (6 pp, sha256 `3c3df1d77355024c`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed (audit)), 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).
[Datasheet PDF](docs/2sa73-datasheet.pdf)