# DY-ITR8105

**TONYU** · Photointerrupters - Slot Type - Transistor Output · DIP-4

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](docs/dy-itr8105-datasheet.pdf) (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](docs/dy-itr8105-datasheet.pdf)