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MMBZ5230BLT1G
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onsemi Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MMBZ5230BLT1G
onsemi · Zener Diodes · SOT-23
MMBZ5230BLT1G 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 | Anode of the 4.7 V Zener diode (VZ 4.46 V min to 4.94 V max at IZT = 20 mA); connects to the low-potential side in reverse-Zener regulation. |
| 2 | NC | unconnected | No connection internally (STYLE 8, pin 2 is No Connection). |
| 3 | Cathode | passive | Cathode of the 4.7 V Zener diode, marked by the polarity band; goes to the positive side in reverse-Zener regulation (VZ 4.46 V min to 4.94 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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage | VZ | 4.46 | 4.7 | 4.94 | V | @ IZT = 20 mA, TA = 25°C | 3 |
| Maximum Zener Impedance | ZZT | 19 | Ω | @ IZT = 20 mA | 3 | ||
| Maximum Zener Impedance | ZZK | 1900 | Ω | @ IZK = 0.25 mA | 3 | ||
| Reverse Leakage Current | IR | 5 | µA | @ VR = 2 V | 3 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10 mA, all types | 3 | ||
| Forward Voltage | VF | 0.95 | V | IF = 10 mA | 2 | ||
| Total Power Dissipation on FR-5 Board | PD | 225 | mW | TA = 25°C, FR-5 board | 1 | ||
| Derating above 25°C (FR-5) | PD | 1.8 | mW/°C | Derated above 25°C, FR-5 board | 1 | ||
| Total Power Dissipation on Alumina Substrate | PD | 300 | mW | TA = 25°C, alumina substrate | 1 | ||
| Derating above 25°C (Alumina) | PD | 2.4 | mW/°C | Derated above 25°C, alumina substrate | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Thermal Resistance Junction-to-Ambient (FR-5) | RθJA | 556 | °C/W | FR-5 board | 1 | ||
| Thermal Resistance Junction-to-Ambient (Alumina) | RθJA | 417 | °C/W | Alumina substrate | 1 | ||
| Maximum Soldering Case Temperature | 260 | °C | 10 seconds | 1 |
CAD (KiCad official)
- Symbol:
MMBZ5230BLT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbz5230blt1g-etched.step/mmbz5230blt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz5230blt1g.step/mmbz5230blt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
ecb795b32601f300, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).
# MMBZ5230BLT1G
**onsemi** · Zener Diodes · SOT-23
MMBZ5230BLT1G 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 | Anode of the 4.7 V Zener diode (VZ 4.46 V min to 4.94 V max at IZT = 20 mA); connects to the low-potential side in reverse-Zener regulation. |
| 2 | NC | unconnected | No connection internally (STYLE 8, pin 2 is No Connection). |
| 3 | Cathode | passive | Cathode of the 4.7 V Zener diode, marked by the polarity band; goes to the positive side in reverse-Zener regulation (VZ 4.46 V min to 4.94 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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage | VZ | 4.46 | 4.7 | 4.94 | V | @ IZT = 20 mA, TA = 25°C | 3 |
| Maximum Zener Impedance | ZZT | | | 19 | Ω | @ IZT = 20 mA | 3 |
| Maximum Zener Impedance | ZZK | | | 1900 | Ω | @ IZK = 0.25 mA | 3 |
| Reverse Leakage Current | IR | | | 5 | µA | @ VR = 2 V | 3 |
| Forward Voltage | VF | | | 0.9 | V | IF = 10 mA, all types | 3 |
| Forward Voltage | VF | | | 0.95 | V | IF = 10 mA | 2 |
| Total Power Dissipation on FR-5 Board | PD | | | 225 | mW | TA = 25°C, FR-5 board | 1 |
| Derating above 25°C (FR-5) | PD | | | 1.8 | mW/°C | Derated above 25°C, FR-5 board | 1 |
| Total Power Dissipation on Alumina Substrate | PD | | | 300 | mW | TA = 25°C, alumina substrate | 1 |
| Derating above 25°C (Alumina) | PD | | | 2.4 | mW/°C | Derated above 25°C, alumina substrate | 1 |
| Junction and Storage Temperature Range | TJ, Tstg | -65 | | 150 | °C | | 1 |
| Thermal Resistance Junction-to-Ambient (FR-5) | RθJA | | | 556 | °C/W | FR-5 board | 1 |
| Thermal Resistance Junction-to-Ambient (Alumina) | RθJA | | | 417 | °C/W | Alumina substrate | 1 |
| Maximum Soldering Case Temperature | | | | 260 | °C | 10 seconds | 1 |
## CAD (KiCad official)
- Symbol: `MMBZ5230BLT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbz5230blt1g-etched.step` / `mmbz5230blt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbz5230blt1g.step` / `mmbz5230blt1g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mmbz5230blt1-d.pdf) (6 pp, sha256 `ecb795b32601f300`, retrieved 2026-10-22, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/mmbz5230blt1g-datasheet.pdf)