component
SMBJ70A-AT
Public Made by Adomby adom
Brightking Elec (TAIWAN) TVS, SMB(DO-214AA). Pinout cross-checked by two models against the datasheet, 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
markdownSMBJ70A-AT
Brightking Elec (TAIWAN) · TVS · SMB(DO-214AA)
SMBJ70A-AT from Brightking Elec (TAIWAN), 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 terminal, marked by the color band on the unidirectional SMBJ70A-AT, with VRWM 70.0 V, VBR 77.80~86.00 V at 1 mA and maximum VC 113.0 V at 5.3 A IPP. |
| 2 | A | passive | Anode terminal of the unidirectional SMBJ70A-AT, with reverse leakage of 1 μA maximum at VRWM 70.0 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Brightking Elec (TAIWAN) |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBR | 77.8 | 86 | V | @IT=1mA, TA=25℃ | 3 | |
| Maximum Clamping Voltage | VC | 113 | V | @IPP=5.3A | 3 | ||
| Reverse Leakage | IR | 1 | μA | @VRWM=70V | 3 | ||
| Peak pulse power dissipation | PPPM | 600 | Watts | 10/1000μs waveform | 1 | ||
| Steady state power dissipation | PM(AV) | 5 | Watts | TA=50℃ | 1 | ||
| Peak forward surge current | IFSM | 100 | Amps | 8.3ms single half sine-wave superimposed on rated load | 1 | ||
| Operating junction and storage temperature | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Reverse Stand-Off Voltage | VRWM | 70 | V | 3 | |||
| Peak Pulse Current | IPP | 5.3 | A | 10/1000μs waveform | 3 | ||
| Thermal resistance junction to lead | RθJL | 20 | ℃/W | Typical | 1 | ||
| Thermal resistance junction to ambient | RθJA | 100 | ℃/W | Typical | 1 |
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 | copper | 2. Mounted on 5.0mm×5.0mm (0.03mm thick) copper pads to each terminal. | 1 |
CAD (KiCad official)
- Symbol:
SMBJ70A-AT - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj70a-at-etched.step/smbj70a-at-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj70a-at.step/smbj70a-at.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Brightking Elec (TAIWAN) datasheet (7 pp, sha256
a2bc93a3b45c5e72, retrieved 2026-10-26, 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).