# AT817B-FeH-DE

**AOTE** · Transistor, Photovoltaic Output Optoisolators · DIP-4

AT817B-FeH-DE from AOTE, 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 | LED anode (input side). Forward current IF up to 50 mA continuous, 1000 mA peak (1 µs pulse); VF typ 1.2 V / max 1.4 V at IF=20 mA. Drive through a current-limit resistor; keep reverse voltage below VR=6 V. |
| 2 | CATHODE | passive | LED cathode (input side). Return terminal for the infrared emitter; typically tied to input-side ground/return of the drive circuit. |
| 3 | EMITTER | passive | Phototransistor emitter (output side). Galvanically isolated from the LED side (VISO > 5000 Vrms, 1 min). Usually tied to output-side ground/return. |
| 4 | COLLECTOR | passive | Phototransistor collector (output side). Maximum IC=50 mA, VCEO=80 V, PC=150 mW. Dark current ICEO ≤ 100 nA at VCE=20 V. Current transfer ratio 130%-260% (bin B) at IF=5 mA, VCE=5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | AOTE |
| Package | DIP-4 |
| Category | Optoisolators |
| Pins | 4 |

## Ordering variants

Same part, different packaging or reel option.

- `AT817B-FeH-DED`
- `AT817B-FeH-DEM`
- `AT817B-FeH-DES`

## CAD (KiCad official)

- Symbol: `AT817B-FeH-DE`
- Footprint: `Package_DIP:DIP-4_W7.62mm`
- 3D model: DIP-4 (KiCad packages3D, STEP)
- 3D model files: `at817b-feh-de-etched.step` / `at817b-feh-de-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `at817b-feh-de.step` / `at817b-feh-de.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [AOTE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590921295544729600) (12 pp, sha256 `29c7ba82cd4372ed`, 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](docs/at817b-feh-de-datasheet.pdf)