component
MMBZ5270BLT1G
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
markdownMMBZ5270BLT1G
onsemi · Zener Diodes · SOT-23
MMBZ5270BLT1G 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 Zener diode (forward-biased direction is anode to cathode, VF = 0.9 V max at IF = 10 mA); the Zener voltage of the MMBZ5270B is 91 V nominal (86.45 V min to 95.55 V max) at IZT = 1.4 mA. |
| 2 | NC | unconnected | No connection (SOT-23 CASE 318 Style 8, pin 2 is not connected internally). |
| 3 | Cathode | passive | Cathode of the Zener diode, marked by the polarity band, which goes positive relative to the anode in Zener regulation at VZ = 91 V nominal. |
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 | 86.45 | 91 | 95.55 | V | @ IZT = 1.4 mA, TA = 25°C | 3 |
| Zener Test Current | IZT | 1.4 | mA | Zener voltage test current | 3 | ||
| Maximum Zener Impedance | ZZT | 400 | Ω | @ IZT = 1.4 mA | 3 | ||
| Maximum Zener Impedance | ZZK | 2300 | Ω | @ IZK = 0.25 mA | 3 | ||
| Reverse Leakage Current | IR | 0.1 | µA | @ VR = 69 V | 3 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10 mA, all types | 3 | ||
| Total Power Dissipation on FR-5 Board | PD | 225 | mW | TA = 25°C, Note 1 | 1 | ||
| Derating above 25°C (FR-5) | PD | 1.8 | mW/°C | Derated above 25°C, FR-5 | 1 | ||
| Total Power Dissipation on Alumina Substrate | PD | 300 | mW | TA = 25°C, Note 2 | 1 | ||
| Derating above 25°C (Alumina) | PD | 2.4 | mW/°C | Derated above 25°C, alumina | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Thermal Resistance, Junction-to-Ambient (FR-5) | RθJA | 556 | °C/W | Note 1, FR-5 board | 1 | ||
| Thermal Resistance, Junction-to-Ambient (Alumina) | RθJA | 417 | °C/W | Note 2, alumina substrate | 1 |
CAD (KiCad official)
- Symbol:
MMBZ5270BLT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbz5270blt1g-etched.step/mmbz5270blt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz5270blt1g.step/mmbz5270blt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (7 pp, sha256
e9ee257cfd09f81d, 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).