# SI9948AEY

**UMW** · MOSFETs · SOP-8

SI9948AEY from UMW, 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 channel 1 (P-channel MOSFET); the device limits are VDS = -60 V and continuous ID = -5.3 A at TC = 25 °C. |
| 2 | G1 | input | Gate of channel 1; the datasheet limits VGS to ±20 V. |
| 3 | S2 | passive | Source of channel 2 (P-channel MOSFET); the device limits are VDS = -60 V and continuous ID = -5.3 A at TC = 25 °C. |
| 4 | G2 | input | Gate of channel 2; the datasheet limits VGS to ±20 V. |
| 5 | D2 | passive | Drain of channel 2 (P-channel MOSFET); the device limit is VDS = -60 V. |
| 6 | D2 | passive | Drain of channel 2 (P-channel MOSFET); the device limit is VDS = -60 V. |
| 7 | D1 | passive | Drain of channel 1 (P-channel MOSFET); the device limit is VDS = -60 V. |
| 8 | D1 | passive | Drain of channel 1 (P-channel MOSFET); the device limit is VDS = -60 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| 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 |  |  | -60 | V |  | 2 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 2 |
| Continuous Drain Current | ID |  |  | -5.3 | A | TC=25°C | 2 |
| Continuous Drain Current | ID |  |  | -5 | A | TC=70°C | 2 |
| Pulsed Drain Current | IDM |  |  | -32 | A |  | 2 |
| Continuous Source-Drain Diode Current | IS |  |  | -4.1 | A | TC=25°C | 2 |
| Continuous Source-Drain Diode Current | IS |  |  | -2 | A | TA=25°C | 2 |
| Avalanche Current | IAS |  |  | -20 | A |  | 2 |
| Single-Pulse Avalanche Energy | EAS |  |  | 20 | mJ | L = 0.1 mH | 2 |
| Maximum Power Dissipation | PD |  |  | 4 | W | TC=25°C | 2 |
| Maximum Power Dissipation | PD |  |  | 2.5 | W | TC=70°C | 2 |
| Maximum Power Dissipation | PD |  |  | 2 | W | TA=25°C | 2 |
| Maximum Power Dissipation | PD |  |  | 1.4 | W | TA=70°C | 2 |
| Operating Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | °C |  | 2 |
| Maximum Junction-to-Ambient (t ≤ 10s) | RthJA |  | 38 | 50 | °C/W | t ≤10s | 1 |
| Maximum Junction-to-Ambient (steady state) | RthJA |  |  | 85 | °C/W | Steady-state, per note c | 1 |
| Maximum Junction-to-Foot | RthJF |  | 20 | 25 | °C/W |  | 1 |
| Drain-Source Breakdown Voltage | VDS | -60 |  |  | V | VDS=0V, ID=-250μA | 3 |
| Gate-Source Threshold Voltage | VGS(th) | -1 |  | -3 | V | VDS=VGS, ID=-250μA | 3 |
| Gate-Source Leakage | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±20V | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | µA | VDS=-30V, VGS=0V | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -5 | µA | VDS=-30V, VGS=0V, TJ=55°C | 3 |
| On-State Drain Current | ID(ON) | -30 |  |  | A | VDS≥-10V, VGS=-10V | 3 |
| Drain-Source On-State Resistance | RDS(ON) |  |  | 54 | mΩ | VGS=-10V, ID=-5A | 3 |
| Drain-Source On-State Resistance | RDS(ON) |  |  | 59 | mΩ | VGS=-4.5V, ID=-4.5A | 3 |
| Body Diode Voltage | VSD |  | -0.75 | -1.2 | V | IS=-2A, VGS=0V | 4 |
| Pulse Diode Forward Current | ISM |  |  | -32 | A |  | 4 |

## CAD (KiCad official)

- Symbol: `SI9948AEY`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `si9948aey-etched.step` / `si9948aey-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si9948aey.step` / `si9948aey.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757271947426717696) (11 pp, sha256 `aaa20b599cbf2f90`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/si9948aey-datasheet.pdf)