# NCE4953

**Wuxi NCE Power Semiconductor** · MOSFETs · SOP-8

NCE4953 from Wuxi NCE Power Semiconductor, 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, rated VDS -30V and ID -5.1A. |
| 2 | G1 | input | Gate of MOSFET 1, with VGS limit of ±20V and RDS(ON) specified at VGS=-4.5V and -10V. |
| 3 | S2 | passive | Source of P-channel MOSFET 2, rated VDS -30V and ID -5.1A. |
| 4 | G2 | input | Gate of MOSFET 2, with VGS limit of ±20V and RDS(ON) specified at VGS=-4.5V and -10V. |
| 5 | D2 | passive | Drain of MOSFET 2, tied internally to pin 6, with pulsed drain current up to -20A. |
| 6 | D2 | passive | Drain of MOSFET 2, tied internally to pin 5, with pulsed drain current up to -20A. |
| 7 | D1 | passive | Drain of MOSFET 1, tied internally to pin 8, with pulsed drain current up to -20A. |
| 8 | D1 | passive | Drain of MOSFET 1, tied internally to pin 7, with pulsed drain current up to -20A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Wuxi NCE Power Semiconductor |
| Package | SOP-8 |
| Category | Transistors/Thyristors |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Drain-Source Voltage | VDS | -30 |  |  | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Drain Current-Continuous | ID | -5.1 |  |  | A |  | 1 |
| Drain Current-Pulsed (Note 1) | IDM | -20 |  |  | A | Repetitive rating: pulse width limited by maximum junction temperature | 1 |
| Maximum Power Dissipation | PD |  |  | 2.5 | W |  | 1 |
| Operating Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance, Junction-to-Ambient (Note 2) | RθJA |  |  | 50 | ℃/W | Surface mounted on FR4 Board, t ≤ 10 sec | 1 |
| Drain-Source Breakdown Voltage | BVDSS | -30 | -33 |  | V | VGS=0V ID=-250μA | 1 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | μA | VDS=-24V,VGS=0V | 1 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±20V,VDS=0V | 2 |
| Gate Threshold Voltage | VGS(th) | -1 | -1.6 | -3 | V | VDS=VGS,ID=-250μA | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 43 | 55 | mΩ | VGS=-10V, ID=-5.1A | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 62 | 90 | mΩ | VGS=-4.5V, ID=-4.2A | 2 |
| Forward Transconductance | gFS | 4 | 7 |  | S | VDS=-15V,ID=-4.5A | 2 |
| Diode Forward Voltage (Note 3) | VSD |  |  | -1.2 | V | VGS=0V,IS=-5.1A | 2 |

## CAD (KiCad official)

- Symbol: `NCE4953`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `nce4953-etched.step` / `nce4953-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nce4953.step` / `nce4953.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Wuxi NCE Power Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588879900501004288) (7 pp, sha256 `30ac150c7cd653ba`, retrieved 2026-10-10, 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/nce4953-datasheet.pdf)