component
MMSZ5240BQ
Public Made by Adomby adom
Yangzhou Yangjie Elec Tech Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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MMSZ5240BQ
Yangzhou Yangjie Elec Tech · Zener Diodes · SOD-123
MMSZ5240BQ from Yangzhou Yangjie Elec Tech, in a SOD-123. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOD-123 |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (VZ), 5% tolerance | VZ | -5 | 5 | % | Printed as VZ-tolerance ±5% approximately (Features) | 1 | |
| Zener voltage | VZ | 9.5 | 10 | 10.5 | V | Izt = 20 mA | 2 |
| Zener impedance | Zzt | 17 | Ω | IZt = 20 mA | 2 | ||
| Zener impedance at knee | Zzk | 600 | Ω | Izk = 0.25 mA | 2 | ||
| Reverse leakage current | IR | 3 | µA | VR = 8.0 V | 2 | ||
| Power dissipation | PD | 500 | mW | Ta=25℃ | 1 | ||
| Storage temperature range | Tstg | -55 | 150 | °C | 1 | ||
| Junction temperature | TJ | -55 | 150 | °C | 1 | ||
| Maximum forward voltage | VF | 0.9 | V | IF = 10 mAdc | 1 | ||
| Thermal resistance junction to ambient air | RθJA | 340 | °C/W | Junction to ambient air* (footnote not reproduced in text) | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5240BQ - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5240bq-etched.step/mmsz5240bq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5240bq.step/mmsz5240bq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Yangzhou Yangjie Elec Tech datasheet (5 pp, sha256
beb20cd7a6e887b9, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).
# MMSZ5240BQ
**Yangzhou Yangjie Elec Tech** · Zener Diodes · SOD-123
MMSZ5240BQ from Yangzhou Yangjie Elec Tech, in a SOD-123. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOD-123 |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (VZ), 5% tolerance | VZ | -5 | | 5 | % | Printed as VZ-tolerance ±5% approximately (Features) | 1 |
| Zener voltage | VZ | 9.5 | 10 | 10.5 | V | Izt = 20 mA | 2 |
| Zener impedance | Zzt | | | 17 | Ω | IZt = 20 mA | 2 |
| Zener impedance at knee | Zzk | | | 600 | Ω | Izk = 0.25 mA | 2 |
| Reverse leakage current | IR | | | 3 | µA | VR = 8.0 V | 2 |
| Power dissipation | PD | | | 500 | mW | Ta=25℃ | 1 |
| Storage temperature range | Tstg | -55 | | 150 | °C | | 1 |
| Junction temperature | TJ | -55 | | 150 | °C | | 1 |
| Maximum forward voltage | VF | | | 0.9 | V | IF = 10 mAdc | 1 |
| Thermal resistance junction to ambient air | RθJA | | 340 | | °C/W | Junction to ambient air* (footnote not reproduced in text) | 1 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
## CAD (KiCad official)
- Symbol: `MMSZ5240BQ`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `mmsz5240bq-etched.step` / `mmsz5240bq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmsz5240bq.step` / `mmsz5240bq.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603373553740107776) (5 pp, sha256 `beb20cd7a6e887b9`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/mmsz5240bq-datasheet.pdf)