component
SMBJ40AQ
Public Made by Adomby adom
Yangzhou Yangjie Elec Tech ESD And Surge Protection (TVS/ESD), SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 9d ago |
| viewers | 9d ago |
| package.json | 9d ago |
| page.json | 9d ago |
| README.md | 9d ago |
| smbj40aq-etched.glb | 9d ago |
| smbj40aq-etched.step | 9d ago |
| smbj40aq-hero.glb | 9d ago |
| smbj40aq-hero.overlay.json | 9d ago |
| smbj40aq.glb | 9d ago |
| smbj40aq.kicad_mod | 9d ago |
| smbj40aq.kicad_sym | 9d ago |
| smbj40aq.lbr | 9d ago |
| smbj40aq.step | 9d ago |
SMBJ40AQ
Yangzhou Yangjie Elec Tech · ESD And Surge Protection (TVS/ESD) · SMB
SMBJ40AQ from Yangzhou Yangjie Elec Tech, in a SMB. 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 end marked with the band on uni-directional SMBJ40AQ; connect to the protected line, with working peak reverse voltage 40 V and breakdown 44.4 V to 49.1 V at 1 mA. |
| 2 | A | passive | Anode, the unbanded end of the uni-directional SMBJ40AQ; connect to ground, with maximum clamping voltage 64.5 V at 9.3 A peak pulse current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SMB |
| 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 | 44.4 | 49.1 | V | @ IT = 1 mA | 2 | |
| Working Peak Reverse Voltage | VRWM | 40 | V | 2 | |||
| Maximum Reverse Leakage | IR | 1 | μA | @ VRWM | 2 | ||
| Maximum Reverse Surge Current | IPP | 9.3 | A | 2 | |||
| Maximum Clamping Voltage | Vc | 64.5 | V | @ IPP | 2 | ||
| Maximum instantaneous forward voltage | VF | 3.5 | V | at 50A, unidirectional only | 1 | ||
| Peak pulse power dissipation | PPPM | 600 | W | 10/1000us waveform | 1 | ||
| Power dissipation | PD | 5 | W | on infinite heat sink at TL=75℃ | 1 | ||
| Peak forward surge current | IFSM | 100 | A | 8.3 ms single half sine-wave, unidirectional only | 1 | ||
| Operating junction temperature | TJ | -55 | 175 | ℃ | 1 | ||
| Storage temperature range | TSTG | -55 | 175 | ℃ | 1 | ||
| Thermal resistance junction to lead | RθJL | 20 | ℃/W | junction to lead | 3 | ||
| Thermal resistance junction to ambient | RθJA | 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:
SMBJ40AQ - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
smbj40aq-etched.step/smbj40aq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj40aq.step/smbj40aq.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
c858e6d6adc08fc3, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-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).