NSI45030AT1G from onsemi, in a SOD-123. 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	K	passive	Cathode terminal of the constant current regulator. Current flows into the anode and out of the cathode, regulated to Ireg(SS) = 30 mA typ at Vak = 7.5 V.
2	A	passive	Anode terminal of the constant current regulator. Max anode-cathode voltage Vak = 45 V; regulated current 30 mA typ (27/33 min/max) at Vak = 7.5 V with only ~1.8 V voltage overhead.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOD-123
Category	LED-drv
Pins	2

Ordering variants

Same part, different packaging or reel option.

NSI45030AT1G
NSI45030AT1GNSV45030AT1G

CAD (KiCad official)

Symbol: NSI45030AT1G
Footprint: Diode_SMD:D_SOD-123
3D model: SOD-123 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`nsi45030at1g.step`	52 KB	You want the bare part, or you mark your own boards.
`nsi45030at1g-etched.step`	2.1 MB	You want the part with `NSI45030AT1G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 532 faces against 59 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: onsemi datasheet (8 pp, sha256 588a3e4ece87e39d, 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