component
BSR33-QX
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
markdownBSR33-QX
Nexperia · Bipolar (BJT) · SOT-89
BSR33-QX 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 PNP transistor; emitter-base voltage is limited to -5 V (VEBO) and emitter current is bounded by the collector current limit of -1 A (IC). |
| 2 | C | passive | Collector of the PNP transistor, also tied to the exposed heatsink tab; limits are VCBO -90 V, VCEO -80 V, IC -1 A continuous and ICM -2 A peak (single pulse). |
| 3 | B | input | Base of the PNP transistor; peak base current is limited to -200 mA (IBM, 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 | VCBO | -90 | V | open emitter | 2 | ||
| Collector-emitter voltage | VCEO | -80 | V | open base | 2 | ||
| Emitter-base voltage | VEBO | -5 | V | open collector | 2 | ||
| Collector current | IC | -1 | A | 2 | |||
| Peak collector current | ICM | -2 | A | 2 | |||
| Peak base current | IBM | -200 | mA | single pulse; tp ≤ 1 ms | 2 | ||
| Total power dissipation | Ptot | 1.35 | W | Tamb ≤ 25 °C; device mounted on FR4 PCB, single-sided copper, mounting pad for collector 6 cm² | 2 | ||
| Junction temperature | Tj | 150 | °C | 2 | |||
| Ambient temperature | Tamb | -65 | 150 | °C | 2 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 2 | ||
| Thermal resistance junction to ambient | Rth(j-a) | 93 | K/W | in free air; device mounted on FR4 PCB, single-sided copper, mounting pad for collector 6 cm² | 2 | ||
| Thermal resistance junction to solder point | Rth(j-sp) | 13 | K/W | 2 | |||
| Collector-base cut-off current (emitter open) | ICBO | -100 | nA | VCB = -60 V; IE = 0 A; Tamb = 25 °C | 3 | ||
| Collector-base cut-off current (emitter open) | ICBO | -50 | µA | VCB = -60 V; IE = 0 A; Tj = 150 °C | 3 | ||
| Emitter-base cut-off current (collector open) | IEBO | -100 | nA | VEB = -5 V; IC = 0 A; Tamb = 25 °C | 3 | ||
| DC current gain | hFE | 30 | VCE = -5 V; IC = -100 µA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 3 | |||
| DC current gain | hFE | 100 | 300 | VCE = -5 V; IC = -100 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 3 | ||
| DC current gain | hFE | 50 | VCE = -5 V; IC = -500 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 3 | |||
| Collector-emitter saturation voltage | VCEsat | -0.25 | V | IC = -150 mA; IB = -15 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 3 | ||
| Collector-emitter saturation voltage | VCEsat | -0.5 | V | IC = -500 mA; IB = -50 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 3 | ||
| Base-emitter saturation voltage | VBEsat | -1 | V | IC = -150 mA; IB = -15 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 3 | ||
| Base-emitter saturation voltage | VBEsat | -1.2 | V | IC = -500 mA; IB = -50 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.01; Tamb = 25 °C | 3 | ||
| Transition frequency | fT | 100 | MHz | VCE = -10 V; IC = -50 mA; f = 100 MHz; Tamb = 25 °C | 3 |
CAD (KiCad official)
- Symbol:
BSR33-QX - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
bsr33-qx-etched.step/bsr33-qx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bsr33-qx.step/bsr33-qx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (7 pp, sha256
64ef407deafc4d7b, retrieved 2026-10-19, 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).