DY-ITR8105 from TONYU, in a DIP-4. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	Anode	passive	Infrared LED anode; forward voltage 1.2 V typ, 1.5 V max at IF=20mA, absolute maximum forward current 50 mA, reverse voltage 5 V.
2	Cathode	passive	Infrared LED cathode; 940 nm peak wavelength at IF=20mA, reverse current 10 uA max at VR=5V.
3	Collector	passive	Phototransistor collector; collector-emitter voltage 30 V max, collector current 20 mA max, dark current 100 nA max at VCE=20V.
4	Emitter	passive	Phototransistor emitter; emitter-collector voltage 5 V max, VCE(sat) 0.4 V max at IC=2mA.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Forward voltage	VF		1.2	1.5	V	IF=20mA	4
Reverse current	IR			10	μA	VR=5V	4
Dark current	ICEO			100	nA	VCE=20V, Ee=0mW/cm2	4
C-E saturation voltage	VCE(sat)			0.4	V	IC=2mA, Ee=1mW/cm2	4
Collector current (on)	IC(ON)	0.5			mA	VCE=5V, IF=20mA	4
Collector current (off)	IC(OFF)			20	μA	VCE=5V, IF=20mA	4
Power dissipation (input)	Pd			75	mW	at (or below) 25℃ free air temperature	7
Reverse voltage	VR			5	V		7
Forward current	IF			50	mA		7
Peak forward current	IFP			1	A	Pulse width ≦100μs, Duty cycle=1%	7
Collector power dissipation	Pc			75	mW		7
Collector current	Ic			20	mA		7
Collector-emitter voltage	BVCEO			30	V		7
Emitter-collector voltage	BVECO			5	V		7
Operating temperature	Topr	-25		85	℃		7
Storage temperature	Tstg	-45		85	℃		7
Soldering temperature	Tsol			260	℃	Wave soldering, 3mm out of physical body, ≤3S	7
Forward voltage tolerance	VF	-0.1		0.1	V		4
Radiant intensity tolerance		-10		10	%		4
Wavelength tolerance	λp	-1		1	nm		4
Peak wavelength	λp		940		nm	IF=20mA	4
Rise time	TR		15		μs	VCE=5V, IC=1mA, RL=1KΩ	4
Fall time	TF		15		μs	VCE=5V, IC=1mA, RL=1KΩ	4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	The kinked tooling scrape easily the pin of LED, where the LED bracket is rusting easily, especial expose it in moist air. To decrease the LED bracket rust, advise using plated tin LED bracket.	10

CAD (KiCad official)

Symbol: DY-ITR8105
Footprint: Package_DIP:DIP-4_W7.62mm
3D model: DIP-4 (KiCad packages3D, STEP)
3D model files: dy-itr8105-etched.step / dy-itr8105-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); dy-itr8105.step / dy-itr8105.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: TONYU datasheet (10 pp, sha256 88b2ed04b0465315, retrieved 2026-10-30, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

DY-ITR8105

Verified DY-ITR8105

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README