component
SMBJ8.5A
Public Made by Adomby adom
FTR TVS, DO-214AA(SMB). 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
markdownSMBJ8.5A
FTR · TVS · DO-214AA(SMB)
SMBJ8.5A from FTR, in a DO-214AA(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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FTR |
| Package | DO-214AA(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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off voltage (unidirectional SMBJ8.5A) | VRWM | 8.5 | V | 2 | |||
| Breakdown voltage | VBR | 9.4 | 10.4 | V | IT = 1 mA | 2 | |
| Maximum clamping voltage | VC | 14.4 | V | IPP = 41.7 A | 2 | ||
| Reverse leakage current | IR | 10 | μA | @VRWM | 2 | ||
| Peak pulse power dissipation | PPPM | 600 | W | 10/1000μs waveform (Note 1, Fig.1) | 1 | ||
| Peak pulse current | IPPM | 41.7 | A | 10/1000μs waveform (Note 1, Fig.3); value from IPP column for SMBJ8.5A | 1 | ||
| Steady state power dissipation | PM(AV) | 5 | W | TL=75℃ (Fig.4) | 1 | ||
| Peak forward surge current | IFSM | 100 | A | 8.3ms single half sine-wave, JEDEC method (Note 2) | 1 | ||
| Operating junction and storage temperature range | 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 | ||
| Average ramp-up rate (TL to TP) | 3 | ℃/second | Pb-free assembly reflow profile | 4 | |||
| Preheat temperature min | TS min | 150 | ℃ | Pb-free assembly reflow profile | 4 | ||
| Preheat temperature max | TS max | 200 | ℃ | Pb-free assembly reflow profile | 4 | ||
| Preheat time | tS | 60 | 180 | seconds | Preheat, min to max | 4 | |
| Ramp-up rate (TS max to TL) | 3 | ℃/second | Pb-free assembly reflow profile | 4 | |||
| Time maintained above liquidus temperature | tL | 60 | 150 | seconds | Time above TL = 217℃ | 4 | |
| Liquidus temperature | TL | 217 | ℃ | Time maintained above TL | 4 | ||
| Peak temperature | TP | 260 | ℃ | Pb-free assembly reflow profile | 4 | ||
| Time within 5℃ of actual peak temperature | tP | 20 | 40 | seconds | Within 5℃ of actual peak temperature | 4 | |
| Ramp-down rate | 6 | ℃/second | Pb-free assembly reflow profile | 4 | |||
| Time 25℃ to peak temperature | 8 | minutes | Pb-free assembly reflow profile | 4 |
CAD (KiCad official)
- Symbol:
SMBJ8.5A - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
- 3D model files:
smbj8-5a-etched.step/smbj8-5a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj8-5a.step/smbj8-5a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FTR datasheet (6 pp, sha256
0d5134e86f94d39e, 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).