component
BST52
Public Unreviewedby Ray
Nexperia Darlington Transistors, SOT-89-3. Datasheet-verified pinout, 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
markdownBST52
Nexperia · Darlington Transistors · SOT-89-3
BST52 from Nexperia, in a SOT-89-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | E | passive | Emitter of the NPN Darlington pair. Common return path for collector current; VEBO limited to 5 V (open collector). |
| 2 | C | passive | Collector of the NPN Darlington pair. Main current-handling terminal; VCEO up to 80 V, IC up to 1 A (peak 2 A). Also connected to the SOT89 heat-spreading tab for improved thermal dissipation. |
| 3 | B | passive | Base control input of the NPN Darlington pair. Drives the compound transistor through an integrated base-emitter resistor with an anti-parallel diode; IB limited to 100 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-89-3 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
BST52 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (8 pp, sha256
8ca616767aa12634, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).