SMBJ18CAQ
Public Made by Adomby adom
Yangzhou Yangjie Elec Tech ESD And Surge Protection (TVS/ESD), 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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README
markdownSMBJ18CAQ
Yangzhou Yangjie Elec Tech · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ18CAQ from Yangzhou Yangjie Elec Tech, 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 | Yangzhou Yangjie Elec Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse power dissipation | PPPM | 600 | W | 10/1000us waveform | 1 | ||
| Power dissipation | PD | 5 | W | on infinite heat sink at TL=75℃ | 1 | ||
| Operating junction temperature | TJ | -55 | 175 | ℃ | 1 | ||
| Storage temperature range | TSTG | -55 | 175 | ℃ | 1 | ||
| Working peak reverse voltage | VRWM | 18 | V | 2 | |||
| Breakdown voltage | VBR | 20 | 22.1 | V | IT=1 mA (pulse test tp≤50ms) | 2 | |
| Maximum reverse leakage | IR | 1 | μA | @ VRWM | 2 | ||
| Maximum reverse surge current | IPP | 20.6 | A | surge current waveform per Fig.3, derated per Fig.2 | 2 | ||
| Maximum clamping voltage | VC | 29.2 | V | @ IPP | 2 | ||
| Thermal resistance, junction to lead (typical) | RθJL | 20 | ℃/W | junction to lead | 3 | ||
| Thermal resistance, junction to ambient (typical) | RθJCA | 100 | ℃/W | junction to ambient | 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 |
|---|---|---|---|---|
| housing | black | 4. Body color: Black | 3 | |
| contacts | tin | ● Terminals: Matte tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
CAD (KiCad official)
- Symbol:
SMBJ18CAQ - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj18caq-etched.step/smbj18caq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj18caq.step/smbj18caq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Yangzhou Yangjie Elec Tech datasheet (6 pp, sha256
c01aa656ef4102c3, retrieved 2026-10-16, 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).