component
MMBZ5231ELT1G
Public Made by Adomby adom
onsemi Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MMBZ5231ELT1G
onsemi · Zener Diodes · SOT-23
MMBZ5231ELT1G 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 diode anode terminal; the cathode is marked by the polarity band on the package. |
| 2 | NC | unconnected | No connection (NC) on this SOT-23 style 8 package, so the pin is not internally connected. |
| 3 | CATHODE | passive | Zener diode cathode terminal, indicated by the polarity band on the package. |
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 @ IZT | VZ | 4.84 | 5.1 | 5.36 | V | @ IZT = 20 mA; pulse test current, TA = 25°C (Note 4) | 2 |
| Maximum Zener Impedance @ IZT | ZZT | 17 | Ω | @ IZT = 20 mA | 2 | ||
| Maximum Zener Impedance @ IZK | ZZK | 1600 | Ω | @ IZK = 0.25 mA | 2 | ||
| Reverse Leakage Current @ VR | IR | 5 | µA | @ VR = 2 V | 2 | ||
| Forward Voltage @ IF | VF | 0.9 | V | @ IF = 10 mA | 2 | ||
| Peak Power Dissipation | Ppk | 225 | W | @ TL ≤ 25°C, 20 µs (Note 1) | 1 | ||
| Total Power Dissipation on FR-5 Board | PD | 225 | mW | @ TA = 25°C (Note 2) | 1 | ||
| Total Power Dissipation on Alumina Substrate | PD | 300 | mW | @ TA = 25°C (Note 3) | 1 | ||
| Thermal Resistance, Junction-to-Ambient (FR-5 Board) | RθJA | 556 | °C/W | FR-5 board (Note 2) | 1 | ||
| Thermal Resistance, Junction-to-Ambient (Alumina Substrate) | RθJA | 417 | °C/W | Alumina substrate (Note 3) | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
MMBZ5231ELT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbz5231elt1g-etched.step/mmbz5231elt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz5231elt1g.step/mmbz5231elt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (7 pp, sha256
aad7747846afa508, 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).
# MMBZ5231ELT1G
**onsemi** · Zener Diodes · SOT-23
MMBZ5231ELT1G 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 diode anode terminal; the cathode is marked by the polarity band on the package. |
| 2 | NC | unconnected | No connection (NC) on this SOT-23 style 8 package, so the pin is not internally connected. |
| 3 | CATHODE | passive | Zener diode cathode terminal, indicated by the polarity band on the package. |
## 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 @ IZT | VZ | 4.84 | 5.1 | 5.36 | V | @ IZT = 20 mA; pulse test current, TA = 25°C (Note 4) | 2 |
| Maximum Zener Impedance @ IZT | ZZT | | | 17 | Ω | @ IZT = 20 mA | 2 |
| Maximum Zener Impedance @ IZK | ZZK | | | 1600 | Ω | @ IZK = 0.25 mA | 2 |
| Reverse Leakage Current @ VR | IR | | | 5 | µA | @ VR = 2 V | 2 |
| Forward Voltage @ IF | VF | | | 0.9 | V | @ IF = 10 mA | 2 |
| Peak Power Dissipation | Ppk | | | 225 | W | @ TL ≤ 25°C, 20 µs (Note 1) | 1 |
| Total Power Dissipation on FR-5 Board | PD | | | 225 | mW | @ TA = 25°C (Note 2) | 1 |
| Total Power Dissipation on Alumina Substrate | PD | | | 300 | mW | @ TA = 25°C (Note 3) | 1 |
| Thermal Resistance, Junction-to-Ambient (FR-5 Board) | RθJA | | | 556 | °C/W | FR-5 board (Note 2) | 1 |
| Thermal Resistance, Junction-to-Ambient (Alumina Substrate) | RθJA | | | 417 | °C/W | Alumina substrate (Note 3) | 1 |
| Junction and Storage Temperature Range | TJ, Tstg | -65 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `MMBZ5231ELT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbz5231elt1g-etched.step` / `mmbz5231elt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbz5231elt1g.step` / `mmbz5231elt1g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590223425098063872) (7 pp, sha256 `aad7747846afa508`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/mmbz5231elt1g-datasheet.pdf)