component
MMSZ5248BQ
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.
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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Contents
README
markdownMMSZ5248BQ
Yangzhou Yangjie Elec Tech · Zener Diodes · SOD-123
MMSZ5248BQ 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 min/max | Vz | 17.1 | 18 | 18.9 | V | at Izt = 7 mA, Ta=25℃ | 2 |
| Dynamic impedance at Izt | Zzt | 21 | Ω | at Izt = 7 mA | 2 | ||
| Dynamic impedance at Izk | Zzk | 600 | Ω | at Izk = 0.25 mA | 2 | ||
| Reverse current | IR | 0.1 | μA | VR = 14.0 V | 2 | ||
| Maximum Forward Voltage | VF | 0.9 | V | IF=10mAdc | 1 | ||
| Power Dissipation | PD | 500 | mW | Ta=25℃ | 1 | ||
| Storage Temperature Range | Tstg | -55 | 150 | °C | 1 | ||
| Junction Temperature | TJ | -55 | 150 | °C | 1 | ||
| Thermal Resistance Junction to Ambient Air | RθJA | 340 | °C/W | 1 | |||
| Zener test current | Izt | 7 | mA | Ta=25℃ | 2 |
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:
MMSZ5248BQ - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5248bq-etched.step/mmsz5248bq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5248bq.step/mmsz5248bq.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
d9d69146a86255eb, 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).