component
MMBZ5258BS-7-F
Public Made by Adomby adom
Diodes Incorporated Zener Diodes, SOT-363. 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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Contents
README
markdownMMBZ5258BS-7-F
Diodes Incorporated · Zener Diodes · SOT-363
MMBZ5258BS-7-F from Diodes Incorporated, in a SOT-363. 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 | A1 | passive | Anode of Zener diode 1, which has 36V nominal (34.2V to 37.8V at IZT = 3.4mA) breakdown for the MMBZ5258BS. |
| 2 | NC | unconnected | No internal connection. |
| 3 | C2 | passive | Cathode of Zener diode 2, which is isolated from diode 1 and has 36V nominal (34.2V to 37.8V at IZT = 3.4mA) breakdown. |
| 4 | A2 | passive | Anode of Zener diode 2, which is isolated from diode 1; each diode is rated 200mW total package dissipation. |
| 5 | NC | unconnected | No internal connection. |
| 6 | C1 | passive | Cathode of Zener diode 1, which has 36V nominal (34.2V to 37.8V at IZT = 3.4mA) breakdown with max 0.1µA leakage at VR = 27V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-363 |
| Category | Diodes |
| Pins | 6 |
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 | 34.2 | 36 | 37.8 | V | IZT = 3.4mA, TA = 25°C | 2 |
| Zener Test Current | IZT | 3.4 | mA | 2 | |||
| Maximum Zener Impedance | ZZT | 70 | Ω | @ IZT, f = 1KHz | 2 | ||
| Maximum Zener Knee Impedance | ZZK | 700 | Ω | @ IZK = 0.25mA, f = 1KHz | 2 | ||
| Maximum Reverse Leakage Current | IR | 0.1 | μA | @ VR = 27V | 2 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10mA | 1 | ||
| Power Dissipation | PD | 200 | mW | Mounted on FR4 PC board, TA = 25°C | 1 | ||
| Thermal Resistance, Junction to Ambient Air | RθJA | 625 | °C/W | Mounted on FR4 PC board with recommended pad layout | 1 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 150 | °C | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | • Terminals: Solderable per MIL-STD-202, Method 208 • Lead Free Plating (Matte Tin Finish annealed over Alloy 42 | 1 |
CAD (KiCad official)
- Symbol:
MMBZ5258BS-7-F - Footprint:
Package_TO_SOT_SMD:SOT-363_SC-70-6 - 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files:
mmbz5258bs-7-f-etched.step/mmbz5258bs-7-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz5258bs-7-f.step/mmbz5258bs-7-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (4 pp, sha256
b594a591fc6c585d, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).