# 4148WS

**MOT** · Switching Diodes · SOD-323

4148WS from MOT, in a SOD-323. 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 | A | passive | Anode of the high-speed switching diode; forward voltage max 1.25V at IF=150mA, continuous forward current 150mA. |
| 2 | C | passive | Cathode of the high-speed switching diode; DC blocking voltage 100V, reverse current 5.0μA max at VR=75V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MOT |
| Package | SOD-323 |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | V(BR) | 100 |  |  | V | IR=100uA | 1 |
| Breakdown Voltage | V(BR) | 75 |  |  | V | IR=5.0uA | 1 |
| Forward Voltage | VF |  |  | 0.715 | V | IF=1mA | 1 |
| Forward Voltage | VF |  |  | 0.855 | V | IF=10mA | 1 |
| Forward Voltage | VF |  |  | 1 | V | IF=50mA | 1 |
| Forward Voltage | VF |  |  | 1.25 | V | IF=150mA | 1 |
| Reverse Current | IR |  |  | 25 | nA | VR=20V | 1 |
| Reverse Current | IR |  |  | 5 | μA | VR=75V | 1 |
| Total Capacitance | CT |  |  | 4 | pF | VR=0, f=1.0MHz | 1 |
| Reverse Recovery Time | trr |  |  | 4 | ns | IF=10mA, VR=6.0V (60mA), IRR=1.0mA, RL=100Ω | 1 |
| Peak Repetitive Reverse Voltage | VRRM |  |  | 100 | V | TA=25°C | 1 |
| Work Peak Reverse Voltage | VRWM |  |  | 100 | V | TA=25°C | 1 |
| DC Blocking Voltage | VR |  |  | 100 | V | TA=25°C | 1 |
| RMS Blocking Voltage | VR(RMS) |  |  | 71 | V | TA=25°C | 1 |
| Forward Continuous Current | IO |  |  | 150 | mA | TA=25°C | 1 |
| Average Rectified Output Current | IO |  |  | 100 | mA | TA=25°C | 1 |
| Non-repetitive Peak Forward Surge Current | IFSM |  |  | 2 | A | t=8.3ms | 1 |
| Power Dissipation | PD |  |  | 200 | mW | TA=25°C | 1 |
| Operation Junction And Storage Temperature Range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal Resistance From Junction to Ambient | θJA |  | 625 |  | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `4148WS`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `4148ws-etched.step` / `4148ws-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `4148ws.step` / `4148ws.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MOT datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604436930616705024) (3 pp, sha256 `38f3041adac6c1af`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/4148ws-datasheet.pdf)