# BL8531CC3TR30

**BL(Shanghai Belling)** · DC-DC Converters · SOT-89-3

BL8531CC3TR30 from BL(Shanghai Belling), in a SOT-89-3. 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 | GND | power_in | Ground pin of the controller. |
| 2 | OUT | power_in | Output pin that supplies power to the internal circuitry, with an absolute maximum voltage range of -0.3V to 12V. |
| 3 | EXT | output | Switching pin that drives the external NMOSFET or NPN transistor, with an absolute maximum voltage of -0.3V to (VOUT+0.3V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BL(Shanghai Belling) |
| Package | SOT-89-3 |
| Category | Power Management ICs |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BL8531CC3TR30`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `bl8531cc3tr30-etched.step` / `bl8531cc3tr30-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bl8531cc3tr30.step` / `bl8531cc3tr30.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BL(Shanghai Belling) datasheet](docs/bl8531cc3tr30-datasheet.pdf) (12 pp, sha256 `728fb85b6bf28bac`, retrieved 2026-11-02, tier: lcsc)
- **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/bl8531cc3tr30-datasheet.pdf)