component
MMBZ5242BLT1G
Public Made by Adomby adom
onsemi Zener Diodes, SOT-23. 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
markdownMMBZ5242BLT1G
onsemi · Zener Diodes · SOT-23
MMBZ5242BLT1G from onsemi, in a SOT-23. 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 | ANODE | passive | Zener anode terminal; the datasheet gives forward voltage VF of 0.9 V max at IF = 10 mA for all types in the series. |
| 2 | NC | unconnected | No connection; this pin has no internal connection in the SOT-23 Style 8 package. |
| 3 | CATHODE | passive | Cathode terminal, indicated by the polarity band; for the MMBZ5242B the Zener voltage is 11.40 V min, 12 V nominal, 12.60 V max at IZT = 20 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage | VZ | 11.4 | 12 | 12.6 | V | @ IZT = 20 mA | 3 |
| Maximum Zener Impedance | ZZT | 30 | Ω | @ IZT = 20 mA | 3 | ||
| Maximum Zener Impedance | ZZK | 600 | Ω | @ IZK = 0.25 mA | 3 | ||
| Reverse Leakage Current | IR | 1 | µA | @ VR = 9.1 V | 3 | ||
| Forward Voltage | VF | 0.95 | V | @ IF = 10 mA | 2 | ||
| Total Power Dissipation on FR-5 Board | PD | 225 | mW | TA = 25°C (Note 1, FR-5 board) | 1 | ||
| Total Power Dissipation on Alumina Substrate | PD | 300 | mW | TA = 25°C (Note 2, alumina substrate) | 1 | ||
| Thermal Resistance, Junction-to-Ambient (FR-5 Board) | RJA | 556 | °C/W | FR-5 board (Note 1) | 1 | ||
| Thermal Resistance, Junction-to-Ambient (Alumina Substrate) | RJA | 417 | °C/W | Alumina substrate (Note 2) | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
MMBZ5242BLT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbz5242blt1g-etched.step/mmbz5242blt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz5242blt1g.step/mmbz5242blt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
bdbb8fa2d7f751fd, retrieved 2026-10-16, 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).