component
SMBJ5349B-MS
Public Made by Adomby adom
MSKSEMI Zener Diodes, SMB(DO-214AA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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
markdownSMBJ5349B-MS
MSKSEMI · Zener Diodes · SMB(DO-214AA)
SMBJ5349B-MS from MSKSEMI, in a SMB(DO-214AA). 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SMB(DO-214AA) |
| Category | Diodes |
| Pins | 2 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Maximum Dynamic Impedance | ZZT | 2.5 | Ω | IZ = 100 mA | 3 | ||
| Maximum Reverse Current | IR | 2 | µA | VR = 9.1 V | 3 | ||
| Maximum Regulator Current | IZM | 395 | mA | ±5% devices (Note 5) | 3 | ||
| Maximum Dynamic Knee Impedance | ZZK | 125 | Ω | @1.0 mA | 3 | ||
| Maximum Surge Current | IZSM | 7.5 | A | Nonrecurring sine wave, 8.3 ms (Note 6) | 3 | ||
| Maximum Voltage Regulation | ΔVZ | 0.25 | V | Difference between voltage at 10% and 50% IZM (Note 7) | 3 | ||
| Nominal Zener Voltage tolerance | VZ | -5 | 5 | % | Devices listed without C suffix have ±5% tolerance on nominal VZ (Note 1) | 4 | |
| Steady State Power Dissipation | P(AV) | 5 | W | Lead temperature at 75°C (Note 3) | 2 | ||
| Maximum Forward Voltage | VF | 1.2 | V | IF = 1.0 A | 2 | ||
| Operating Junction Temperature Range | -55 | 150 | °C | 2 | |||
| Storage Temperature Range | -55 | 150 | °C | 2 | |||
| Thermal Resistance Junction to Lead | 15 | °C/W | Junction to lead | 2 | |||
| Thermal Resistance Junction to Ambient | 90 | °C/W | Junction to ambient (Note 2) | 2 | |||
| Regulator Voltage (nominal) | VZ | 12 | V | IZ = 100 mA; @25°C | 3 |
CAD (KiCad official)
- Symbol:
SMBJ5349B-MS - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj5349b-ms-etched.step/smbj5349b-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj5349b-ms.step/smbj5349b-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (6 pp, sha256
fdbb089c9980bb8a, retrieved 2026-10-14, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).