VNL5050S5TR-E from STMicroelectronics, in a SO-8. 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	SUPPLY VOLTAGE	power_in	Supply voltage for the signal (logic) part, typically 5 V. Feeds the internal SUPPLY/LOGIC block.
2	INPUT	input	Voltage-controlled input pin with hysteresis, CMOS compatible. Controls the output switch (power MOS) state. DC input current rating -1 to 10 mA. Recommended pull-down to GND through a 10 kΩ resistor if left unused.
3	STATUS	output	Open-drain digital diagnostic pin (VNL5050S5-E only). Signals fault conditions such as overtemperature or open-load. May be left floating if unused; must NOT be tied to ground. DC status current rating -1 to 10 mA.
4	NC	unconnected	No internal connection. May be left floating or tied to ground.
5	DRAIN	passive	Power MOSFET drain. Connects to the load (low-side switch - the other side of the load ties to the battery). Internally clamped VDS (VCLAMP = 41 V), ID up to 19 A. Pins 5 and 8 are internally tied together.
6	SOURCE	power_in	Power MOSFET source and ground reference for the control section. Pins 6 and 7 are internally tied together and used as the device ground.
7	SOURCE	power_in	Power MOSFET source and ground reference for the control section. Pins 6 and 7 are internally tied together and used as the device ground.
8	DRAIN	passive	Power MOSFET drain. Connects to the load (low-side switch). Pins 5 and 8 are internally tied together; recommended to connect all DRAIN pins to a copper pour for thermal dissipation.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SO-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

VNL5050S5-E
VNL5050S5TR-E
VNL5050N3-E
VNL5050N3TR-E

CAD (KiCad official)

Symbol: VNL5050S5TR-E
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`vnl5050s5tr-e.step`	122 KB	You want the bare part, or you mark your own boards.
`vnl5050s5tr-e-etched.step`	2.5 MB	You want the part with `VNL5050S5TR-E` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 603 faces against 147 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: STMicroelectronics datasheet (33 pp, sha256 44edd20a5e513e96, 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