BSP452 from Infineon, 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	OUT	power_out	High-side switched output to the load. Connected to the drain-side of the internal N-channel power FET; RON ~0.16 Ω typ at Tj=25 °C, self-limited load current IL(SC) ~1.5 A typ, output clamps at Vbb-VON(CL) (~47 V typ) during inductive switch-off.
2	GND	power_in	Logic (signal) ground reference for the device. A 150 Ω resistor in series with GND is required for reverse-battery protection and to limit GND current at supply voltages above Vbb(AZ).
3	IN	input	CMOS-compatible logic input that activates the high-side power switch on a logical high signal. VIN(T+) max 3.5 V, VIN(T-) min 1.5 V, integrated series resistor RIN ~2.8 kΩ typ, allowable input range -3.0 V to Vbb (input current must not exceed ±5 mA).
4	Vbb	power_in	Positive battery/power supply input. Operating range 5.0 V to 34 V, absolute max 40 V; undervoltage shutdown at 3.5-5 V, overvoltage shutdown at 34-42 V, internal overvoltage clamp Vbb(AZ) ≥41 V.

Key specifications

Parameter	Value
Manufacturer	Infineon
Package	SOT-223
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

BSP452Q67000-S271

CAD (KiCad official)

Symbol: BSP452
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bsp452.step`	64 KB	You want the bare part, or you mark your own boards.
`bsp452-etched.step`	1.4 MB	You want the part with `BSP452` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 341 faces against 75 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Infineon datasheet (10 pp, sha256 815edbc3f6313043, retrieved 2026-08-17, tier: lcsc)
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