component
SMBJ70A
Public Made by Adomby adom
FOSAN 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
markdownSMBJ70A
FOSAN · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ70A from FOSAN, 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 | FOSAN |
| 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 working voltage | VRWM | 70 | V | 2 | |||
| Breakdown voltage | VBR | 77.8 | 89.5 | V | IT = 1 mA | 2 | |
| Peak power dissipation | PPK | 600 | W | 1 | |||
| Peak forward surge current (UNI) | IFSM | 100 | A | 1 | |||
| Forward voltage (UNI) | VF | 3.5 | V | IF = 35 A | 1 | ||
| Power dissipation | PD | 5 | W | 1 | |||
| Junction/storage temperature | TJ,Tstg | -55 | 150 | ℃ | 1 | ||
| Clamping voltage | VC | 113 | V | @IPP = 5.3 A | 2 | ||
| Reverse leakage current | IR | 5 | µA | @VRWM = 70 V | 2 |
CAD (KiCad official)
- Symbol:
SMBJ70A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj70a-etched.step/smbj70a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj70a.step/smbj70a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FOSAN datasheet (4 pp, sha256
3669787e11f43216, 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).