BSP52

@@ -0,0 +1,45 @@+# BSP52++**Nexperia** · Darlington Transistors · SOT-223++BSP52 from Nexperia, in a SOT-223. 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 | B | input | Base of the NPN Darlington. Drives the internal Darlington pair through an integrated base-emitter resistor. VBEsat up to 1.9 V at IC = 500 mA; IB rated to 100 mA max; VEBO = 5 V. |+| 2 | C | passive | Collector of the NPN Darlington (electrically common with pin 4 / heatsink tab). VCES = 80 V, VCBO = 90 V, IC = 1 A continuous (2 A peak); VCEsat up to 1.3 V at IC = 500 mA. |+| 3 | E | passive | Emitter of the NPN Darlington. Anti-parallel integrated diode is connected between collector and emitter. |+| 4 | C | passive | Collector (heatsink tab). Electrically identical to pin 2; provides thermal path for power dissipation. Rth(j-sp) = 17 K/W; Ptot = 1.25 W at Tamb = 25 °C on 1 cm² pad. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | SOT-223 |+| Category | Transistors/Thyristors |+| Pins | 4 |++## Ordering variants++Same part, different packaging or reel option.++- `BSP52`++## CAD (KiCad official)++- Symbol: `BSP52`+- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`+- 3D model: SOT-223 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/BSP52.pdf) (9 pp, sha256 `5cd6bd54ae06e75c`, 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).++[Datasheet PDF](docs/bsp52-datasheet.pdf)

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