component
SZ1SMA30CAT3G
Public Made by Adomby adom
Littelfuse TVS, SMA. 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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Contents
README
markdownSZ1SMA30CAT3G
Littelfuse · TVS · SMA
SZ1SMA30CAT3G from Littelfuse, in a SMA. 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 | SMA |
| 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, minimum | VBR | 33.3 | V | @ IT = 1 mA (bi-directional table; note 7: measured at 25°C ambient) | 4 | ||
| Breakdown voltage, maximum | VBR | 36.81 | V | @ IT = 1 mA (bi-directional table; note 7: measured at 25°C ambient) | 4 | ||
| Maximum reverse leakage current | IR | 2.5 | µA | @ VRWM = 30 V | 4 | ||
| Breakdown voltage, nominal | VBR | 35.06 | V | @ IT = 1 mA (bi-directional table; note 7: measured at 25°C ambient) | 4 | ||
| Peak power dissipation | PPK | 400 | W | TL = 25°C, pulse width 1 ms (note 1: 10 x 1000 µs, non-repetitive) | 1 | ||
| DC power dissipation at TL = 75°C | PD | 1.5 | W | TL = 75°C, measured zero lead length (note 2) | 1 | ||
| DC power dissipation derating above 75°C | PD | 20 | mW/°C | Derate above TL = 75°C | 1 | ||
| DC power dissipation at TA = 25°C | PD | 0.5 | W | TA = 25°C, FR-4 board, Littelfuse minimum recommended footprint (note 3) | 1 | ||
| DC power dissipation derating above 25°C | PD | 4 | mW/°C | Derate above TA = 25°C | 1 | ||
| Operating and storage temperature range | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Thermal resistance, junction-to-lead | RθJL | 50 | °C/W | Measured zero lead length, 1 in² copper pad, FR-4 (note 2) | 1 | ||
| Thermal resistance, junction-to-ambient | RθJA | 250 | °C/W | FR-4 board, Littelfuse minimum recommended footprint (note 3) | 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 | and the terminal finish material is tin(Sn) (IPC/ | 1 |
CAD (KiCad official)
- Symbol:
SZ1SMA30CAT3G - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
sz1sma30cat3g-etched.step/sz1sma30cat3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sz1sma30cat3g.step/sz1sma30cat3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (7 pp, sha256
2dcbd1b5c6bf6a05, retrieved 2026-10-28, 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).