component
SMCJ18A
Public Made by Adomby adom
Taisko ESD And Surge Protection (TVS/ESD), SMC(DO-214AB). 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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Contents
README
markdownSMCJ18A
Taisko · ESD And Surge Protection (TVS/ESD) · SMC(DO-214AB)
SMCJ18A from Taisko, in a SMC(DO-214AB). 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 | Taisko |
| Package | SMC(DO-214AB) |
| 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 | VBR | 20 | 22.1 | V | @ IT = 1 mA | 3 | |
| Maximum clamping voltage | VC | 29.2 | V | @ IPP = 51.4 A | 3 | ||
| Maximum peak pulse current | IPP | 51.4 | A | 3 | |||
| Maximum reverse leakage current | IR | 1 | μA | @ VR (18 V reverse stand-off) | 3 | ||
| Reverse stand-off voltage | VR | 18 | V | 3 | |||
| Peak pulse power dissipation | PPPM | 1500 | W | 10/1000us non-repetitive waveform, copper pad 8×8mm (Notes 1, 2) | 3 | ||
| Steady state power dissipation | PD | 6.5 | W | infinite heat sink, TA=50°C (Note 3) | 3 | ||
| Peak forward surge current | IFSM | 200 | A | 8.3ms single half sine wave (Note 4) | 3 | ||
| Maximum instantaneous forward voltage | VFM | 3.5 | V | at 100 A, unidirectional only; 3.5 V applies for VBR ≤200 V (Note 5) | 3 | ||
| Operating temperature range | TJ | -55 | 150 | ℃ | 3 | ||
| Storage temperature range | TSTG | -55 | 150 | ℃ | 3 | ||
| Typical thermal resistance junction to lead | RθJL | 15 | ℃/W | typical | 3 | ||
| Typical thermal resistance junction to ambient | RθJA | 75 | ℃/W | typical | 3 |
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 | Lead Finish: Matte Tin Case Material: Epoxy Molding Compound. | 1 |
CAD (KiCad official)
- Symbol:
SMCJ18A - Footprint:
Diode_SMD:D_SMC - 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files:
smcj18a-etched.step/smcj18a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smcj18a.step/smcj18a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Taisko datasheet (8 pp, sha256
bb76d9c11f3fc36a, 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).