# MMBD4448V

**CBI** · Switching Diodes · SOT-563

MMBD4448V from CBI, in a SOT-563. 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 (marked +), the forward current path to pin 6 with VRRM 80 V and IFM 500 mA continuous. |
| 2 | NC | unconnected | No internal connection. |
| 3 | K2 | passive | Cathode of diode 2 (marked −), the forward current path from pin 4 with VRRM 80 V and IFM 500 mA continuous. |
| 4 | A2 | passive | Anode of diode 2 (marked +), the forward current path to pin 3 with VRRM 80 V and IFM 500 mA continuous. |
| 5 | NC | unconnected | No internal connection. |
| 6 | K1 | passive | Cathode of diode 1 (marked −), the forward current path from pin 1 with VRRM 80 V and IFM 500 mA continuous. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CBI |
| Package | SOT-563 |
| Category | Diodes |
| Pins | 6 |

## 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) | 80 |  |  | V | IR=2.5 μA | 1 |
| Forward voltage | VF1 |  | 0.62 | 0.72 | V | IF=5mA | 1 |
| Forward voltage | VF2 |  |  | 0.855 | V | IF=10mA | 1 |
| Forward voltage | VF3 |  |  | 1 | V | IF=100mA | 1 |
| Forward voltage | VF4 |  |  | 1.25 | V | IF=150mA | 1 |
| Reverse current | IR1 |  |  | 0.1 | μA | VR=70V | 1 |
| Reverse current | IR2 |  |  | 25 | nA | VR=20V | 1 |
| Capacitance between terminals | CT |  |  | 3.5 | pF | VR=6V, f=1MHz | 1 |
| Reverse recovery time | trr |  |  | 4 | ns | IF=IR=10mA, Irr=0.1XIR, RL=100Ω | 1 |
| Non-Repetitive Peak Reverse Voltage | VRM |  |  | 100 | V |  | 1 |
| Peak Repetitive Reverse Voltage | VRRM |  |  | 80 | V |  | 1 |
| Working Peak Reverse Voltage | VRWM |  |  | 80 | V |  | 1 |
| DC Blocking Voltage | VR |  |  | 80 | V |  | 1 |
| RMS Reverse Voltage | VR(RMS) |  |  | 57 | V |  | 1 |
| Forward Continuous Current | IFM |  |  | 500 | mA |  | 1 |
| Average Rectified Output Current | IO |  |  | 250 | mA |  | 1 |
| Non-Repetitive Peak Forward Surge Current | IFSM |  |  | 2 | A | t=8.3ms | 1 |
| Power Dissipation | Pd |  |  | 150 | mW |  | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  |  | 833 | ℃/W |  | 1 |
| Operation Junction and Storage Temperature Range | Tj,TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `MMBD4448V`
- Footprint: `Package_TO_SOT_SMD:SOT-563`
- 3D model: SOT-563 (KiCad packages3D, STEP)
- 3D model files: `mmbd4448v-etched.step` / `mmbd4448v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbd4448v.step` / `mmbd4448v.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CBI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590225623538311168) (3 pp, sha256 `d64d992668fa6f2a`, retrieved 2026-10-16, 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/mmbd4448v-datasheet.pdf)