OPA340NA from UMW, in a SOT-23-5. 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	output	Op-amp output. Rail-to-rail output stage swings to within ~1 mV of V+ and V- with a 100-kΩ load.
2	V-	power_in	Negative (lowest) power supply rail. Typically ground in single-supply operation; total supply range V+ to V- is 2.5 V to 5.5 V.
3	+IN	input	Non-inverting (positive) analog input. Common-mode range extends 500 mV below V- and 500 mV above V+.
4	-IN	input	Inverting (negative) analog input. Common-mode range extends 500 mV below V- and 500 mV above V+.
5	V+	power_in	Positive (highest) power supply rail. Single-supply operation from 2.5 V up to 5.5 V (V+ to V-).

Key specifications

Parameter	Value
Manufacturer	UMW
Package	SOT-23-5
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

OPA340NA

CAD (KiCad official)

Symbol: OPA340NA
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`opa340na.step`	85 KB	You want the bare part, or you mark your own boards.
`opa340na-etched.step`	1.5 MB	You want the part with `OPA340NA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 380 faces against 102 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: UMW datasheet (18 pp, sha256 e75e687924f6aa75, 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