component
1KSMB51CA
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), 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.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 6d ago |
| viewers | 6d ago |
| 1ksmb51ca-etched.glb | 6d ago |
| 1ksmb51ca-etched.step | 6d ago |
| 1ksmb51ca-hero.glb | 6d ago |
| 1ksmb51ca-hero.overlay.json | 6d ago |
| 1ksmb51ca.glb | 6d ago |
| 1ksmb51ca.kicad_mod | 6d ago |
| 1ksmb51ca.kicad_sym | 6d ago |
| 1ksmb51ca.lbr | 6d ago |
| 1ksmb51ca.step | 6d ago |
| package.json | 6d ago |
| page.json | 6d ago |
| README.md | 6d ago |
1KSMB51CA
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-214AA
1KSMB51CA from Littelfuse, in a 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 | Littelfuse |
| Package | 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 (minimum) | VBR | 48.5 | V | @ IT = 1 mA | 2 | ||
| Breakdown Voltage VBR (maximum) | VBR | 53.6 | V | @ IT = 1 mA | 2 | ||
| Reverse Stand-off Voltage | VR | 43.6 | V | Maximum voltage applied without operation (datasheet definition) | 2 | ||
| Maximum Clamping Voltage | VC | 70.1 | V | @ Ipp 14.3 A | 2 | ||
| Maximum Peak Pulse Current | Ipp | 14.3 | A | 2 | |||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR (43.6 V) | 2 | ||
| Peak Pulse Power Dissipation | PPPM | 1000 | W | TA=25°C, 10/1000µs waveform | 1 | ||
| Power Dissipation on Infinite Heat Sink | PD | 5 | W | TL=50°C | 1 | ||
| Operating Temperature Range | TJ | -65 | 150 | °C | 1 | ||
| Storage Temperature Range | TSTG | -65 | 175 | °C | 1 | ||
| VBR Voltage Tolerance | VBR | -5 | 5 | % | 5% VBR voltage tolerance (A-type part marking) | 6 | |
| VBR Temperature Coefficient | αT | 0.1 | % | VBR @ TJ = VBR@25°C x (1+αT x (TJ - 25)), typical | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 20 | °C/W | 1 | |||
| Typical Thermal Resistance Junction to Ambient | RθJA | 100 | °C/W | 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:
1KSMB51CA - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files:
1ksmb51ca-etched.step/1ksmb51ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1ksmb51ca.step/1ksmb51ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
5456789e35da8ee5, retrieved 2026-10-15, 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).