component
BU406D
Public Made by Adomby adom
OSEN Bipolar (BJT), TO-252. 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
markdownBU406D
OSEN · Bipolar (BJT) · TO-252
BU406D from OSEN, in a TO-252. 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; Emitter-Base voltage max 9 V and continuous base current max 4 A. |
| 2 | C | passive | Collector of the NPN transistor (also the tab); VCBO 400 V, VCEO 200 V, continuous collector current 7 A. |
| 3 | E | passive | Emitter of the NPN transistor; VEBO 9 V max with respect to base. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | OSEN |
| Package | TO-252 |
| 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 Cutoff Current | ICBO | 10 | uA | VCB=400V, IB=0 | 3 | ||
| Emitter Cutoff Current | IEBO | 10 | uA | VEB=9V, IC=0 | 3 | ||
| Collector Emitter Sustaining voltage (Note 1) | BVCEO | 200 | V | IC=100mA, IB=0 | 3 | ||
| Collector Emitter Saturation Voltage (Note 1) | VCE(sat) | 1 | V | IC=5A,IB=1A | 3 | ||
| Base-Emitter Saturation Voltage (Note 1) | VBE(sat) | 1.5 | V | IC=2A,IB=0.4A | 3 | ||
| DC Current Gain (Note 1) | hFE | 50 | 85 | IC=2A, VCE=5V | 3 | ||
| Current-Gain-Bandwidth | fT | 10 | MHZ | VCE=10V, Ic=0.5A, f=1MHz | 3 | ||
| Storage Time | Ts | 1 | 2.5 | us | 3 | ||
| Rise Time | Tr | 1 | us | Ic=500mA,UI9600 | 3 | ||
| Fall Time | Tf | 1 | us | 3 | |||
| Collector-Base Voltage | VCBO | 400 | V | Tc=25°C | 2 | ||
| Collector-Emitter Voltage | VCEO | 200 | V | Tc=25°C | 2 | ||
| Emitter-Base Voltage | VEBO | 9 | V | Tc=25°C | 2 | ||
| Collector Current-Continuous | IC | 7 | A | Tc=25°C | 2 | ||
| Base Current-Continuous | IB | 4 | A | Tc=25°C | 2 | ||
| Collector Power Dissipation | PC | 60 | W | Tc=25°C | 2 | ||
| Max. Operating Junction Temperature | Tj | 150 | ℃ | 2 | |||
| Storage Temperature | Tstg | -55 | 150 | ℃ | 2 | ||
| Junction to Case Thermal Resistance | θJC | 2.08 | °C/W | 2 |
CAD (KiCad official)
- Symbol:
BU406D - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files:
bu406d-etched.step/bu406d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bu406d.step/bu406d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: OSEN datasheet (3 pp, sha256
1ebef8ffc6a6d215, retrieved 2026-10-19, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).