SSP61CN2502MR from Shanghai Siproin Microelectronics, in a SOT-23. 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	VOUT	output	NMOS open-drain detector output. Pulled low (to VSS) when VIN <= VDET(-) (~2.5V, -2%). High-impedance when VIN > VDET(+). Requires an external pull-up resistor (typ. 47k-100k) to the desired logic rail. Guaranteed sink current IOL >= 0.5mA at VOUT=0.2V with VIN=2V.
2	GND	power_in	Ground / VSS reference for the internal bandgap, comparator, and output NMOS source.
3	VIN	power_in	Supply voltage input and monitored voltage node (they are the same pin on this three-terminal detector). Operating range 0.7V to 10V; absolute-max -0.3V to +8.0V. The internal comparator trips VOUT low when VIN falls to VDET(-) = 2.5V - 2%.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

SSP61CN2502MRM
SSP61CN2502MRN

CAD (KiCad official)

Symbol: SSP61CN2502MR
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ssp61cn2502mr.step`	59 KB	You want the bare part, or you mark your own boards.
`ssp61cn2502mr-etched.step`	2.5 MB	You want the part with `SSP61CN2502MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 595 faces against 69 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: Shanghai Siproin Microelectronics datasheet (10 pp, sha256 49887c43b8edefc9, 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