1KSMB56A
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), DO-214AA(SMBJ). 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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README
markdown1KSMB56A
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-214AA(SMBJ)
1KSMB56A from Littelfuse, in a DO-214AA(SMBJ). 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 | Littelfuse |
| Package | DO-214AA(SMBJ) |
| 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 (min) | VBR | 53.2 | 58.8 | V | @ IT = 1 mA | 2 | |
| Maximum clamping voltage | VC | 77 | V | @ Ipp (13.0 A in this row) | 2 | ||
| Maximum peak pulse current | Ipp | 13 | A | 2 | |||
| Maximum reverse leakage current | IR | 1 | µA | @ VR (47.80 V in this row) | 2 | ||
| Reverse stand-off voltage | VR | 47.8 | V | 2 | |||
| Breakdown voltage tolerance (A-suffix part) | VBR | -5 | 5 | % | VBR, A-suffix part | 6 | |
| Peak pulse power dissipation | PPPM | 1000 | W | TA=25°C, 10/1000µs waveform (Fig.2) | 1 | ||
| Power dissipation on infinite heat sink | PD | 5 | W | TL=50°C | 1 | ||
| Peak forward surge current | IFSM | 120 | A | 8.3ms single half sine wave (Note 3) | 1 | ||
| Maximum instantaneous forward voltage | VF | 3.5 | V | at 50A, unidirectional only | 1 | ||
| Operating temperature range | TJ | -65 | 150 | °C | 1 | ||
| Storage temperature range | TSTG | -65 | 175 | °C | 1 | ||
| Breakdown voltage temperature coefficient | αT | 0.1 | % | VBR@TJ = VBR@25°C x (1+αT x (TJ-25)) | 1 | ||
| Thermal resistance junction to lead | RθJL | 20 | °C/W | junction to lead | 1 | ||
| Thermal resistance junction to ambient | RθJA | 100 | °C/W | junction to ambient | 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 | tin | • Matte tin lead-free Plated • Available in breakdown | 1 |
CAD (KiCad official)
- Symbol:
1KSMB56A - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA(SMBJ) (KiCad packages3D, STEP)
- 3D model files:
1ksmb56a-etched.step/1ksmb56a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1ksmb56a.step/1ksmb56a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
5456789e35da8ee5, retrieved 2026-10-16, 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).