SA40A
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), DO-204AC(DO-15). 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
markdownSA40A
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-204AC(DO-15)
SA40A from Littelfuse, in a DO-204AC(DO-15). 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-204AC(DO-15) |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power Dissipation by 10/1000us Test Waveform (Fig.2) (Note 1) | PPPM | 500 | W | 10/1000us test waveform (Fig.2), Note 1 | 1 | ||
| Steady State Power Dissipation on Infinite Heat Sink at TL | PD | 3 | W | TL = 75 C | 1 | ||
| Peak Forward Surge Current, 8.3ms Single Half Sine Wave Unidirectional Only (Note 2) | IFSM | 70 | A | 8.3ms single half sine wave, unidirectional only, Note 2 | 1 | ||
| Maximum Instantaneous Forward Voltage at 35A for Unidirectional Only | VF | 3.5 | V | at 35A, unidirectional only | 1 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -65 | 175 | C | 1 | ||
| Breakdown Voltage VBR @ IT (min) | VBR | 44.4 | V | @ IT = 1 mA | 2 | ||
| Breakdown Voltage VBR @ IT (max) | VBR | 49.1 | V | @ IT = 1 mA | 2 | ||
| Maximum Clamping Voltage VC @ IPP | VC | 64.5 | V | @ IPP = 7.9 A | 2 | ||
| Maximum Peak Pulse Current Ipp | Ipp | 7.9 | A | 2 | |||
| Maximum Reverse Leakage IR @ VR | IR | 1 | uA | @ VR | 2 | ||
| VBR Voltage Tolerance (Uni-Directional, A suffix) | VBR | -5 | 5 | % | Uni-directional type code A, 5% VBR voltage tolerance | 6 | |
| Reverse Stand off Voltage | VR | 40 | V | 2 | |||
| Temperature Coefficient of VBR (alpha T) | aT | 0.1 | % | VBR @ TJ = VBR@25C x (1+aT x (TJ - 25)) | 1 | ||
| Typical Thermal Resistance Junction to Lead | RthetaJL | 20 | C/W | Junction to lead, typical | 1 | ||
| Typical Thermal Resistance Junction to Ambient | RthetaJA | 75 | C/W | Junction to ambient, 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 | tin | • Matte tin lead-free plated • Halogen free and RoHS | 1 |
CAD (KiCad official)
- Symbol:
SA40A - Footprint:
Diode_THT:D_DO-15_P12.70mm_Horizontal - 3D model: DO-204AC(DO-15) (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
c9b8ae16db3781ba, 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).