component
MMBD4448
Public Made by Adomby adom
Changjing Switching Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMMBD4448
Changjing · Switching Diodes · SOT-23
MMBD4448 from Changjing, 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 | Diode anode, the symbol on page 1 shows the diode arrow pointing from pin 1 toward pin 3; peak repetitive reverse voltage is 75 V and average rectified output current is 250 mA. |
| 2 | NC | unconnected | Not connected; the single-diode symbol on page 1 shows pin 2 as an open terminal with no internal connection. |
| 3 | K | passive | Diode cathode, the end the diode arrow points to on the page 1 symbol; non-repetitive peak reverse voltage is 100 V and forward voltage is 0.72 V max at IF=5 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBD4448 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbd4448-etched.step/mmbd4448-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbd4448.step/mmbd4448.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (4 pp, sha256
c8a1ac61f04d0714, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-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).