# BLM4953

**BL(Shanghai Belling)** · MOSFETs · SOP-8

BLM4953 from BL(Shanghai Belling), in a SOP-8. 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 | S1 | passive | Source of P-channel MOSFET 1; the device is rated for VDS = -30V and ID = -5.1A. |
| 2 | G1 | input | Gate of P-channel MOSFET 1; VGS is limited to ±20V, and the device operates with gate voltages as low as 4.5V. |
| 3 | S2 | passive | Source of P-channel MOSFET 2; the device is rated for VDS = -30V and ID = -5.1A. |
| 4 | G2 | input | Gate of P-channel MOSFET 2; VGS is limited to ±20V, and the device operates with gate voltages as low as 4.5V. |
| 5 | D2 | passive | Drain of P-channel MOSFET 2, tied to pin 6; VDS maximum is -30V and continuous ID is -5.1A. |
| 6 | D2 | passive | Drain of P-channel MOSFET 2, tied to pin 5; VDS maximum is -30V and continuous ID is -5.1A. |
| 7 | D1 | passive | Drain of P-channel MOSFET 1, tied to pin 8; VDS maximum is -30V and continuous ID is -5.1A. |
| 8 | D1 | passive | Drain of P-channel MOSFET 1, tied to pin 7; VDS maximum is -30V and continuous ID is -5.1A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BL(Shanghai Belling) |
| Package | SOP-8 |
| Category | Transistors |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `BLM4953`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `blm4953-etched.step` / `blm4953-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `blm4953.step` / `blm4953.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BL(Shanghai Belling) datasheet](docs/blm4953-datasheet.pdf) (6 pp, sha256 `a973dc97cd44df69`, retrieved 2026-10-28, 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/blm4953-datasheet.pdf)