DY-ITR9813 from TONYU, in a DIP-4. 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	ANODE	passive	IR emitter LED anode. Forward voltage VF ≈ 1.2V typ (1.5V max) at IF=20mA; absolute-max IF=50mA (peak IFP=1A, tw≤100µs, 1% duty). Requires an external current-limit resistor.
2	CATHODE	passive	IR emitter LED cathode. Reverse voltage VR = 5V max, reverse current IR ≤ 10µA at VR=5V. Peak emission wavelength λp = 940nm.
3	EMITTER	passive	NPN phototransistor emitter. Typically tied to signal ground (or through load resistor to ground in emitter-follower configuration). BVECO = 5V.
4	COLLECTOR	passive	NPN phototransistor collector. BVCEO = 30V, IC = 20mA max, PC = 75mW. On-state collector current IC(ON) ≥ 0.5mA at VCE=5V/IF=20mA; dark current ICEO ≤ 100nA at VCE=20V; VCE(sat) ≤ 0.4V at IC=2mA, Ee=1mW/cm².

Key specifications

Parameter	Value
Manufacturer	TONYU
Package	DIP-4
Category	Sensor
Pins	4

CAD (KiCad official)

Symbol: DY-ITR9813
Footprint: Package_DIP:DIP-4_W7.62mm
3D model: DIP-4 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`dy-itr9813.step`	158 KB	You want the bare part, or you mark your own boards.
`dy-itr9813-etched.step`	1.8 MB	You want the part with `DY-ITR9813` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 438 faces against 80 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: TONYU datasheet (10 pp, sha256 7465e7673cd3c6c5, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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