# KA2-MMBD4148

**GOODWORK** · Switching Diodes · SOT-23

KA2-MMBD4148 from GOODWORK, 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 | A | passive | Anode of the single switching diode (MMBD4148:KA2); the symbol shows the diode triangle pointing from pin 1 toward pin 3, with 100 V reverse voltage and 300 mA forward continuous current ratings. |
| 2 | NC | unconnected | No internal connection; the KA2 single-diode symbol shows no element attached to pin 2. |
| 3 | K | passive | Cathode of the single switching diode (MMBD4148:KA2), the top pin of the SOT-23 package, with 100 V DC blocking voltage (VR). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GOODWORK |
| 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)1 | 100 |  |  | V | IR=100μA | 2 |
| Reverse breakdown voltage | V(BR)2 | 75 |  |  | V | IR=5 uA | 2 |
| Forward voltage | VF |  |  | 1 | V | IF=10mA | 2 |
| Reverse current | IR1 |  |  | 25 | nA | VR=25V | 2 |
| Reverse current | IR2 |  |  | 5 | uA | VR=75V | 2 |
| Capacitance between terminals | CT |  |  | 4 | pF | VR=0V,f=1MHZ | 2 |
| Reverse recovery time | trr |  |  | 4 | ns | IF=IR=10mA, VR=6V, Irr=0.1XIR, RL=100Ω | 2 |
| Non-Repetitive Peak Reverse Voltage | VRM |  |  | 100 | V | Ta=25℃ | 1 |
| Peak Repetitive Reverse Voltage | VRRM |  |  | 100 | V | Ta=25℃ | 1 |
| Working Peak Reverse Voltage | VRWM |  |  | 100 | V | Ta=25℃ | 1 |
| DC Blocking Voltage | VR |  |  | 100 | V | Ta=25℃ | 1 |
| RMS Reverse Voltage | VR(RMS) |  |  | 75 | V | Ta=25℃ | 1 |
| Forward Continuous Current | IFM |  |  | 300 | mA | Ta=25℃ | 1 |
| Average Rectified Output Current | IO |  |  | 150 | mA | Ta=25℃ | 1 |
| Peak Forward Surge Current | IFSM |  |  | 2 | A | t=1.0μs | 1 |
| Peak Forward Surge Current | IFSM |  |  | 1 | A | t=1.0s | 1 |
| Power Dissipation | PD |  |  | 350 | mW | Ta=25℃ | 1 |
| Thermal Resistance Junction to Ambient | RthJA |  |  | 357 | ℃/W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `KA2-MMBD4148`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ka2-mmbd4148-etched.step` / `ka2-mmbd4148-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ka2-mmbd4148.step` / `ka2-mmbd4148.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GOODWORK datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757771421634846720) (5 pp, sha256 `c7912150b6a56dc6`, retrieved 2026-10-18, 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/ka2-mmbd4148-datasheet.pdf)