component
MPSA42U
Public Made by Adomby adom
CBI 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
markdownMPSA42U
CBI · Bipolar (BJT) · SOT-89
MPSA42U from CBI, 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 of the NPN transistor; VEBO max is 5 V and the emitter-base breakdown voltage V(BR)EBO is min 5 V at IE=100µA. |
| 2 | C | passive | Collector of the NPN transistor; VCBO and VCEO are both 300 V, with continuous collector current IC of 0.3 A. |
| 3 | E | passive | Emitter of the NPN transistor; the emitter-base breakdown voltage V(BR)EBO is min 5 V at IE=100µA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | CBI |
| 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 breakdown voltage | V(BR)CBO | 300 | V | IC= 100μA, IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | 300 | V | IC= 1mA, IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | 5 | V | IE= 100μA, IC=0 | 1 | ||
| Collector cut-off current | ICBO | 0.25 | μA | VCB=200V, IE=0 | 1 | ||
| Emitter cut-off current | IEBO | 0.1 | μA | VEB= 5V, IC=0 | 1 | ||
| DC current gain | hFE(1) | 60 | VCE= 10V, IC= 1mA | 1 | |||
| DC current gain | hFE(2) | 100 | 200 | VCE= 10V, IC=10mA | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.2 | V | IC=20mA, IB= 2mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | 0.9 | V | IC= 20mA, IB=2mA | 1 | ||
| Transition frequency | fT | 50 | MHz | VCE= 20V, IC= 10mA, f=30MHz | 1 | ||
| Collector-base voltage | VCBO | 300 | V | 1 | |||
| Collector-emitter voltage | VCEO | 300 | V | 1 | |||
| Emitter-base voltage | VEBO | 5 | V | 1 | |||
| Collector current, continuous | IC | 0.3 | A | 1 | |||
| Collector power dissipation | PC | 0.35 | W | 1 | |||
| Junction temperature | TJ | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance, junction to ambient | RӨJA | 357 | ℃/mW | 1 |
CAD (KiCad official)
- Symbol:
MPSA42U - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
mpsa42u-etched.step/mpsa42u-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mpsa42u.step/mpsa42u.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: CBI datasheet (3 pp, sha256
4f5c9a2a1811b02f, 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).