component
SMBJ300A
Public Made by Adomby adom
LGE TVS, 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
markdownSMBJ300A
LGE · TVS · SMB(DO-214AA)
SMBJ300A from LGE, 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 | LGE |
| Package | SMB(DO-214AA) |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (min/max) at IT | VBR | 335 | 371 | V | @IT = 1 mA | 3 | |
| Maximum reverse leakage current | IR | 1 | uA | @VRWM = 300 V | 3 | ||
| Working peak reverse voltage | VRWM | 300 | V | 3 | |||
| Maximum reverse surge current | IPP | 1.23 | A | TA=25 °C | 3 | ||
| Maximum clamping voltage | VC | 486 | V | @IPP = 1.23 A | 3 | ||
| Maximum instantaneous forward voltage (unidirectional only) | VF | 5 | V | at 50 A, unidirectional only; VBR>201 V per note 3 | 1 | ||
| Peak power dissipation with 10/1000 µs waveform | PPP | 600 | W | 10/1000 µs waveform, non-repetitive (note 1) | 1 | ||
| Peak forward surge current (unidirectional only) | IFSM | 100 | A | 8.3 ms single half sine-wave, unidirectional only (note 2) | 1 | ||
| Power dissipation on infinite heatsink | PD | 5 | W | infinite heatsink at TL = 75 °C | 1 | ||
| Operating junction and storage temperature range | TJ, TSTG | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
SMBJ300A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj300a-etched.step/smbj300a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj300a.step/smbj300a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LGE datasheet (4 pp, sha256
3c4e7a572b79a220, retrieved 2026-10-21, 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).