# DY-ITR8402

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

DY-ITR8402 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 | Anode of the infrared emitter LED (940nm); forward current max 50mA, VF 1.2V typ at IF=20mA, needs a series protection resistor. |
| 2 | Cathode | passive | Cathode of the infrared emitter LED; reverse voltage max 5V. |
| 3 | Collector | passive | Collector of the phototransistor; collector-emitter voltage max 30V and collector current max 20mA. |
| 4 | Emitter | passive | Emitter of the phototransistor; emitter-collector voltage max 5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TONYU |
| Package | DIP-4 |
| Category | Optoelectronics |
| 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 |  | 4 |
| Forward voltage tolerance (footnote *) | VF | -0.1 |  | 0.1 | V | Forward voltage tolerance range as printed in table notes | 4 |
| Wavelength tolerance (footnote *) | λp | -1 |  | 1 | nm | Wavelength tolerance range as printed in table notes | 4 |
| Radiant intensity tolerance (footnote *) |  | -10 |  | 10 | % | Radiant intensity tolerance range as printed in table notes | 4 |
| Power dissipation | 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%; tw=100 μsec, T=10 msec | 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 |

## CAD (KiCad official)

- Symbol: `DY-ITR8402`
- Footprint: `Package_DIP:DIP-4_W7.62mm`
- 3D model: DIP-4 (KiCad packages3D, STEP)
- 3D model files: `dy-itr8402-etched.step` / `dy-itr8402-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dy-itr8402.step` / `dy-itr8402.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TONYU datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588892118920138752) (10 pp, sha256 `436ff48461565fb6`, retrieved 2026-10-15, 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-itr8402-datasheet.pdf)