component
AD-MMSZ5252BS
Public Made by Adomby adom
Changjing Zener Diodes, SOD-323. 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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AD-MMSZ5252BS
Changjing · Zener Diodes · SOD-323
AD-MMSZ5252BS from Changjing, in a SOD-323. 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 | Changjing |
| Package | SOD-323 |
| 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 | 22.8 | 24 | 25.2 | V | IZT = 5.2 mA, Tj = 25°C, tested with pulses TP ≤ 1.0ms | 2 |
| Maximum Zener impedance | ZZT | 33 | Ω | IZT = 5.2 mA, f = 1kHz | 2 | ||
| Maximum Zener impedance (knee) | ZZK | 600 | Ω | IZK = 0.25 mA, f = 1kHz | 2 | ||
| Maximum reverse current | IR | 0.1 | µA | VR = 18 V | 2 | ||
| Forward voltage | VF | 0.9 | V | IF = 10mA, Tj = 25°C | 1 | ||
| Power dissipation | PD | 200 | mW | Tj = 25°C | 1 | ||
| Thermal resistance from junction to ambient | RθJA | 625 | °C/W | Device mounted on ceramic PCB 7.6 mm x 9.4 mm x 0.87 mm, pad area 25 mm2 | 1 | ||
| Operating junction and storage temperature range | Tj, Tstg | -55 | 150 | °C | 1 | ||
| Zener test current | IZT | 5.2 | mA | Test current for VZ and ZZT | 2 | ||
| Zener knee test current | IZK | 0.25 | mA | Test current for ZZK | 2 |
CAD (KiCad official)
- Symbol:
AD-MMSZ5252BS - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
ad-mmsz5252bs-etched.step/ad-mmsz5252bs-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad-mmsz5252bs.step/ad-mmsz5252bs.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (6 pp, sha256
4b88592edad97ad2, retrieved 2026-10-22, 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).
# AD-MMSZ5252BS
**Changjing** · Zener Diodes · SOD-323
AD-MMSZ5252BS from Changjing, in a SOD-323. 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 | Changjing |
| Package | SOD-323 |
| 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 | 22.8 | 24 | 25.2 | V | IZT = 5.2 mA, Tj = 25°C, tested with pulses TP ≤ 1.0ms | 2 |
| Maximum Zener impedance | ZZT | | | 33 | Ω | IZT = 5.2 mA, f = 1kHz | 2 |
| Maximum Zener impedance (knee) | ZZK | | | 600 | Ω | IZK = 0.25 mA, f = 1kHz | 2 |
| Maximum reverse current | IR | | | 0.1 | µA | VR = 18 V | 2 |
| Forward voltage | VF | | | 0.9 | V | IF = 10mA, Tj = 25°C | 1 |
| Power dissipation | PD | | | 200 | mW | Tj = 25°C | 1 |
| Thermal resistance from junction to ambient | RθJA | | | 625 | °C/W | Device mounted on ceramic PCB 7.6 mm x 9.4 mm x 0.87 mm, pad area 25 mm2 | 1 |
| Operating junction and storage temperature range | Tj, Tstg | -55 | | 150 | °C | | 1 |
| Zener test current | IZT | | 5.2 | | mA | Test current for VZ and ZZT | 2 |
| Zener knee test current | IZK | | 0.25 | | mA | Test current for ZZK | 2 |
## CAD (KiCad official)
- Symbol: `AD-MMSZ5252BS`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `ad-mmsz5252bs-etched.step` / `ad-mmsz5252bs-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ad-mmsz5252bs.step` / `ad-mmsz5252bs.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603004470884384768) (6 pp, sha256 `4b88592edad97ad2`, retrieved 2026-10-22, 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/ad-mmsz5252bs-datasheet.pdf)