component
SMBJ33CA-Q
Public Made by Adomby adom
Liown 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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PCB Footprint
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Datasheet
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README
markdownSMBJ33CA-Q
Liown · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ33CA-Q from Liown, 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 | Liown |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VR | 33 | V | 2 | |||
| Breakdown Voltage | VB | 36.7 | 40.6 | V | @IT = 1 mA | 2 | |
| Test Current | IT | 1 | mA | 2 | |||
| Maximum Clamping Voltage | VC | 53.3 | V | @IPP = 11.3 A | 2 | ||
| Peak Pulse Current | IPP | 11.3 | A | 10/1000μs waveform | 2 | ||
| Reverse Leakage | IR | 1 | μA | @VR | 2 | ||
| Peak pulse power dissipation | PPPM | 600 | W | 10/1000μs waveform, TA=25℃ | 1 | ||
| Steady state power dissipation | PM(AV) | 5 | W | TA=50℃ | 1 | ||
| Peak forward surge current | IFSM | 60 | A | 8.3ms single half sine-wave superimposed on rated load | 1 | ||
| Operating junction and storage temperature | TJ, TSTG | -55 | 150 | ℃ | 1 | ||
| Thermal resistance junction to lead | RθJL | 20 | ℃/W | Typical | 1 | ||
| Thermal resistance junction to ambient | RθJA | 100 | ℃/W | Typical | 1 |
CAD (KiCad official)
- Symbol:
SMBJ33CA-Q - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj33ca-q-etched.step/smbj33ca-q-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj33ca-q.step/smbj33ca-q.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Liown datasheet (6 pp, sha256
08620b4b14f97f1b, retrieved 2026-10-22, 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).