component
2SA1740
Public Made by Adomby adom
Changjiang Electronics Tech (CJ) Bipolar Transistors - BJT, SOT-89-3L. 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
markdown2SA1740
Changjiang Electronics Tech (CJ) · Bipolar Transistors - BJT · SOT-89-3L
2SA1740 from Changjiang Electronics Tech (CJ), in a SOT-89-3L. 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 of the PNP transistor; VEBO max -5 V and emitter cut-off current IEBO max -100 nA at VEB=-4 V. |
| 2 | COLLECTOR | passive | Collector of the PNP transistor; VCBO and VCEO -400 V max, continuous collector current -200 mA max. |
| 3 | EMITTER | passive | Emitter of the PNP transistor; total collector dissipation 500 mW max with junction temperature 150 °C max. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | SOT-89-3L |
| 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 breakdown voltage | V(BR)CBO | -400 | V | IC=-10μA,IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | -400 | 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=-300V,IE=0 | 1 | ||
| Emitter cut-off current | IEBO | -100 | nA | VEB=-4V,IC=0 | 1 | ||
| DC current gain | hFE | 60 | 200 | VCE=-10V,IC=-50mA | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | -0.6 | V | IC=-50mA,IB=-5mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | -1 | V | IC=-50mA,IB=-5mA | 1 | ||
| Transition frequency | fT | 70 | MHz | VCE=-30V,IC=-10mA | 1 | ||
| Collector output capacitance | Cob | 5 | pF | VCB=-30V,IE=0,f=1MHz | 1 | ||
| Turn-ON Time | ton | 0.25 | μs | VCC=-150V,Ic=-50mA,IB1=-IB2=-5mA | 1 | ||
| Turn-OFF Time | toff | 5 | μs | VCC=-150V,Ic=-50mA,IB1=-IB2=-5mA | 1 | ||
| Collector-Base Voltage | VCBO | -400 | V | Ta=25℃ | 1 | ||
| Collector-Emitter Voltage | VCEO | -400 | V | Ta=25℃ | 1 | ||
| Emitter-Base Voltage | VEBO | -5 | V | Ta=25℃ | 1 | ||
| Collector Current -Continuous | IC | -200 | mA | Ta=25℃ | 1 | ||
| Collector Dissipation | PC | 500 | mW | Ta=25℃ | 1 | ||
| Junction Temperature | TJ | 150 | ℃ | Ta=25℃ | 1 | ||
| Storage Temperature | Tstg | -55 | 150 | ℃ | Ta=25℃ | 1 |
CAD (KiCad official)
- Symbol:
2SA1740 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
2sa1740-etched.step/2sa1740-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);2sa1740.step/2sa1740.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjiang Electronics Tech (CJ) datasheet (1 pp, sha256
4f9e03e443be0592, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).