component
MMSZ5240BQ-7-F
Public Made by Adomby adom
Diodes Incorporated 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
markdownMMSZ5240BQ-7-F
Diodes Incorporated · Zener Diodes · SOD-123
MMSZ5240BQ-7-F from Diodes Incorporated, 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 | Diodes Incorporated |
| 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 Range | VZ | 9.5 | 10 | 10.5 | V | @ IZT = 20mA | 2 |
| Maximum Zener Impedance | ZZT | 17 | Ω | @ IZT = 20mA, f = 1KHz | 2 | ||
| Maximum Zener Impedance (knee) | ZZK | 600 | Ω | @ IZK = 0.25mA, f = 1KHz | 2 | ||
| Maximum Reverse Leakage Current | IR | 3 | A | @ VR = 8.0V | 2 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10mA, TA = +25°C | 2 | ||
| Power Dissipation | PD | 500 | mW | @TL = +75°C | 2 | ||
| Power Dissipation | PD | 370 | mW | @TA = +25°C, FR-4 PCB with 1 inch copper pad | 2 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 150 | °C | 2 | ||
| Thermal Resistance, Junction to Ambient Air | RθJA | 338 | °C/W | FR-4 PCB with 1 inch copper pad layout | 2 | ||
| Thermal Resistance, Junction to Lead | RθJL | 132 | °C/W | 2 | |||
| Test Current | IZT | 20 | mA | 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: Matte Tin Finish Annealed over Alloy 42 Leadframe (Lead Free Plating). Solderable per MIL-STD-202, Method 208 | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5240BQ-7-F - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5240bq-7-f-etched.step/mmsz5240bq-7-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5240bq-7-f.step/mmsz5240bq-7-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (5 pp, sha256
7c7ac7a58521db27, retrieved 2026-10-22, tier: manufacturer) - 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).