component
2SD2391U
Public Made by Adomby adom
ST Semtech Bipolar (BJT), SOT-89. 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
markdown2SD2391U
ST Semtech · Bipolar (BJT) · SOT-89
2SD2391U from ST Semtech, in a SOT-89. 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; emitter-base voltage VEBO max 6 V, base drive for IC up to 2 A continuous (6 A peak, PW = 10 ms). |
| 2 | C | passive | Collector; VCBO and VCEO are 60 V max, collector current IC 2 A max and ICP 6 A peak (PW = 10 ms). |
| 3 | E | passive | Emitter; VEBO max 6 V relative to base, carries the combined collector and base current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| Package | SOT-89 |
| 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 Voltage | VCBO | 60 | V | 1 | |||
| Collector Emitter Voltage | VCEO | 60 | V | 1 | |||
| Emitter Base Voltage | VEBO | 6 | V | 1 | |||
| Collector Current | IC | 2 | A | 1 | |||
| Peak Collector Current | ICP | 6 | A | PW = 10 ms | 1 | ||
| Total Power Dissipation | Ptot | 0.5 | W | Device on FR-4 PC board, minimum recommended pad layout (footnote 1) | 1 | ||
| Total Power Dissipation | Ptot | 2 | W | Device on FR-4 PC board, 2oz copper, 1-inch square copper plate (footnote 2) | 1 | ||
| Junction Temperature | Tj | 150 | ℃ | 1 | |||
| Storage Temperature Range | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 250 | ℃/W | Device on FR-4 PC board, minimum recommended pad layout (footnote 1) | 1 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 62.5 | ℃/W | Device on FR-4 PC board, 2oz copper, 1-inch square copper plate (footnote 2) | 1 | ||
| DC Current Gain | hFE | 120 | 270 | VCE = 2 V, IC = 500 mA | 2 | ||
| DC Current Gain | hFE | 45 | VCE = 2 V, IC = 1.5 A | 2 | |||
| Collector Base Cutoff Current | ICBO | 100 | nA | VCB = 50 V | 2 | ||
| Emitter Base Cutoff Current | IEBO | 100 | nA | VEB = 5 V | 2 | ||
| Collector Base Breakdown Voltage | V(BR)CBO | 60 | V | IC = 50 μA | 2 | ||
| Collector Emitter Breakdown Voltage | V(BR)CEO | 60 | V | IC = 1 mA | 2 | ||
| Emitter Base Breakdown Voltage | V(BR)EBO | 6 | V | IE = 50 μA | 2 | ||
| Collector Emitter Saturation Voltage | VCE(sat) | 0.35 | V | IC = 1 A, IB = 50 mA | 2 |
CAD (KiCad official)
- Symbol:
2SD2391U - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
2sd2391u-etched.step/2sd2391u-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);2sd2391u.step/2sd2391u.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (5 pp, sha256
9dd72a1eba57d4f5, retrieved 2026-10-18, 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).