component
BSR43
Public Made by Adomby adom
Nexperia 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
markdownBSR43
Nexperia · Bipolar (BJT) · SOT-89
BSR43 from Nexperia, 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 | E | passive | Emitter of the NPN transistor; the emitter-base voltage VEBO is limited to 5 V (collector open) per the limiting values. |
| 2 | C | passive | Collector of the NPN transistor; limited to 80 V VCEO, 90 V VCBO and 1 A IC (2 A ICM peak), with Ptot 1.35 W at Tamb ≤ 25 °C on the specified FR4 mounting pad. |
| 3 | B | passive | Base of the NPN transistor; peak base current IBM is limited to 0.2 A (single pulse, tp ≤ 1 ms). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| 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 (open emitter) | VCBO | 90 | V | open emitter | 2 | ||
| collector-emitter voltage (open base) | VCEO | 80 | V | open base | 2 | ||
| emitter-base voltage (open collector) | VEBO | 5 | V | open collector | 2 | ||
| collector current | IC | 1 | A | 2 | |||
| peak collector current | ICM | 2 | A | 2 | |||
| peak base current | IBM | 0.2 | A | single pulse; tp ≤ 1 ms | 2 | ||
| total power dissipation | Ptot | 1.35 | W | Tamb ≤ 25 °C [1] | 2 | ||
| junction temperature | Tj | 150 | °C | 2 | |||
| ambient temperature | Tamb | -65 | 150 | °C | 2 | ||
| storage temperature | Tstg | -65 | 150 | °C | 2 | ||
| thermal resistance from junction to ambient | Rth(j-a) | 93 | K/W | in free air [1] | 3 | ||
| thermal resistance from junction to solder point | Rth(j-sp) | 13 | K/W | 3 | |||
| collector-base cut-off current (emitter open) | ICBO | 100 | nA | VCB = 60 V; IE = 0 A; Tamb = 25 °C | 4 | ||
| collector-base cut-off current (emitter open) | ICBO | 50 | µA | VCB = 60 V; IE = 0 A; Tj = 150 °C | 4 | ||
| emitter-base cut-off current (collector open) | IEBO | 100 | nA | VEB = 5 V; IC = 0 A; Tamb = 25 °C | 4 | ||
| DC current gain | hFE | 30 | VCE = 5 V; IC = 100 µA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 4 | |||
| DC current gain | hFE | 100 | 300 | VCE = 5 V; IC = 100 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 4 | ||
| DC current gain | hFE | 50 | VCE = 5 V; IC = 500 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 4 | |||
| collector-emitter saturation voltage | VCEsat | 250 | mV | IC = 150 mA; IB = 15 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 4 | ||
| collector-emitter saturation voltage | VCEsat | 500 | mV | IC = 500 mA; IB = 50 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 4 | ||
| base-emitter saturation voltage | VBEsat | 1 | V | IC = 150 mA; IB = 15 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 4 | ||
| base-emitter saturation voltage | VBEsat | 1.2 | V | IC = 500 mA; IB = 50 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 4 | ||
| collector capacitance | Cc | 12 | pF | VCB = 10 V; IE = 0 A; ie = 0 A; f = 1 MHz; Tamb = 25 °C | 4 | ||
| emitter capacitance | Ce | 90 | pF | VEB = 0.5 V; IC = 0 A; ic = 0 A; f = 1 MHz; Tamb = 25 °C | 4 | ||
| transition frequency | fT | 100 | MHz | VCE = 10 V; IC = 50 mA; f = 100 MHz; Tamb = 25 °C | 4 | ||
| turn-on time (between 10% and 90% levels) | ton | 250 | ns | 4 | |||
| turn-off time (between 10% and 90% levels) | toff | 1 | µs | IC = 100 mA; IBon = 5 mA; IBoff = -5 mA; Tamb = 25 °C | 4 |
CAD (KiCad official)
- Symbol:
BSR43 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
bsr43-etched.step/bsr43-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bsr43.step/bsr43.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (10 pp, sha256
b8a41c4e6d193338, retrieved 2026-10-18, tier: manufacturer) - 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).