# XBL354B-TAG

**XBLW** · Transistor, Photovoltaic Output Optoisolators · SOP-4-2.54mm

XBL354B-TAG from XBLW, in a SOP-4-2.54mm. 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/Cathode | input | Input LED terminal 1; the input is two anti-parallel infrared emitting diodes (AC input response), so this pin is anode of one diode and cathode of the other. |
| 2 | Cathode/Anode | input | Input LED terminal 2; the input is two anti-parallel infrared emitting diodes (AC input response), so this pin is cathode of one diode and anode of the other. |
| 3 | Emitter | passive | Phototransistor emitter output pin. |
| 4 | Collector | passive | Phototransistor collector output pin, with minimum BVCEO of 70 V guaranteed. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XBLW |
| Package | SOP-4-2.54mm |
| Category | Optoisolators |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `XBL354B-TAG`
- Footprint: `Package_SO:SOP-4_3.8x4.1mm_P2.54mm`
- 3D model: SOP-4-2.54mm (KiCad packages3D, STEP)
- 3D model files: `xbl354b-tag-etched.step` / `xbl354b-tag-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xbl354b-tag.step` / `xbl354b-tag.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XBLW datasheet](docs/xbl354b-tag-datasheet.pdf) (11 pp, sha256 `59e02cdcf4fc2e3e`, retrieved 2026-10-14, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/xbl354b-tag-datasheet.pdf)