# MMBD4148CCX

**Shenzhen JingYang** · Switching Diodes · SOT-23

MMBD4148CCX from Shenzhen JingYang, in a SOT-23. 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 | A1 | passive | Anode of diode 1 in the MMBD4148CC common-cathode dual, with 100 V max reverse voltage and 300 mA max forward continuous current. |
| 2 | A2 | passive | Anode of diode 2 in the MMBD4148CC common-cathode dual, with 100 V max reverse voltage and 300 mA max forward continuous current. |
| 3 | K | passive | Common cathode of both diodes (top pin in the package drawing), with 100 V max reverse voltage and 350 mW package power dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen JingYang |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage | V(BR)R1 | 100 |  |  | V | IR=100μA | 2 |
| Reverse Breakdown Voltage | V(BR)R2 | 75 |  |  | V | IR=5μA | 2 |
| Forward voltage | VF |  |  | 1 | V | IF=10mA | 2 |
| Reverse current | IR1 |  |  | 25 | nA | VR=25V | 2 |
| Reverse current | IR2 |  |  | 5 | μA | VR=75V | 2 |
| Diode Capacitance | CD |  |  | 4 | pF | VR=0V,f=1MHz | 2 |
| Reverse Recovery Time | trr |  |  | 4 | ns | IF=10mA,VR=6V, Irr=0.1*IR,RL=100Ω | 2 |
| Peak Repetitive Peak Reverse Voltage | VRRM |  |  | 100 | V | Ta=25℃ unless otherwise specified | 1 |
| Working Peak Reverse Voltage | VRWM |  |  | 100 | V | Ta=25℃ unless otherwise specified | 1 |
| DC Reverse Voltage | VR |  |  | 100 | V | Ta=25℃ unless otherwise specified | 1 |
| Forward Continuous Current | IFM |  |  | 300 | mA | Ta=25℃ unless otherwise specified | 1 |
| Average Rectified Output Current | IO |  |  | 200 | mA | Ta=25℃ unless otherwise specified | 1 |
| Power Dissipation | Pd |  |  | 350 | mW | Ta=25℃ unless otherwise specified | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction to Ambient Air | RθJA |  |  | 357 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `MMBD4148CCX`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbd4148ccx-etched.step` / `mmbd4148ccx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbd4148ccx.step` / `mmbd4148ccx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen JingYang datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603182713545371648) (4 pp, sha256 `57628d4b8d0c7f16`, retrieved 2026-10-17, 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/mmbd4148ccx-datasheet.pdf)