component
MM5Z15B
Public Made by Adomby adom
ST Semtech Zener Diodes, SOT-523. 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
markdownMM5Z15B
ST Semtech · Zener Diodes · SOT-523
MM5Z15B from ST Semtech, in a SOT-523. 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 | Cathode | passive | Cathode of the Zener diode, identified by the cathode line on the package marking; the device is rated for a maximum total power dissipation of 200 mW. |
| 2 | Anode | passive | Anode of the Zener diode; the device has a junction temperature limit of 150 °C and a storage range of -55 to +150 °C. |
| 3 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| Package | SOT-523 |
| Category | Diodes |
| Pins | 3 |
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 | VZT | 14.34 | 14.98 | V | IZT = 5 mA; VZ tested with pulses (20 ms) | 2 | |
| Dynamic impedance | ZZT | 42 | Ω | at IZT = 5 mA; ZZT measured at IZ with very small AC current signal | 2 | ||
| Reverse leakage current | IR | 0.1 | μA | at VR = 11 V | 2 | ||
| Forward voltage | VF | 0.9 | V | at IF = 10 mA | 1 | ||
| Power dissipation | Ptot | 200 | mW | 1 | |||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature range | TStg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance junction to ambient air | RthA | 635 | ℃/W | junction to ambient air | 1 |
CAD (KiCad official)
- Symbol:
MM5Z15B - Footprint:
Package_TO_SOT_SMD:SOT-523 - 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
mm5z15b-etched.step/mm5z15b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm5z15b.step/mm5z15b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (3 pp, sha256
5acd252c61e6c21f, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).