# SZ1SMA10CAT3G

**Littelfuse** · ESD And Surge Protection (TVS/ESD) · SMA

SZ1SMA10CAT3G 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 (bi-directional, 10 V) | VBR | 11.1 | 11.69 | 12.27 | V | @ IT = 1 mA, TA = 25°C (note 7) | 4 |
| Maximum reverse leakage current | IR |  |  | 2.5 | µA | @ VRWM = 10 V | 4 |
| Clamping voltage | VC |  | 17 |  | V | @ IPP = 23.5 A | 4 |
| Maximum reverse peak pulse current | IPP |  | 23.5 |  | A | Surge waveform per Figure 2 (note 8) | 4 |
| Working peak reverse voltage | VRWM |  | 10 |  | V |  | 4 |
| Peak power dissipation | PPK |  |  | 400 | W | @ TL = 25°C, pulse width 1 ms, 10x1000 µs non-repetitive (note 1) | 1 |
| DC power dissipation (lead-referenced) | PD |  |  | 1.5 | W | @ TL = 75°C, measured zero lead length (note 2) | 1 |
| DC power dissipation (ambient) | PD |  |  | 0.5 | W | @ TA = 25°C, FR-4 minimum recommended footprint (note 3) | 1 |
| Thermal resistance junction-to-lead | RθJL |  | 50 |  | °C/W | Junction-to-lead (note 2) | 1 |
| Thermal resistance junction-to-ambient | RθJA |  | 120 |  | °C/W | Junction-to-ambient (note 3) | 1 |
| Operating and storage temperature range | TJ, Tstg | -65 |  | 175 | °C |  | 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 | the terminal finish material is tin(Sn) (IPC/JEDEC J-STD￾609A.01) | 1 |

## CAD (KiCad official)

- Symbol: `SZ1SMA10CAT3G`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `sz1sma10cat3g-etched.step` / `sz1sma10cat3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sz1sma10cat3g.step` / `sz1sma10cat3g.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590266978931019776) (7 pp, sha256 `28d8bdc1607bd94e`, retrieved 2026-10-16, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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).

[Datasheet PDF](docs/sz1sma10cat3g-datasheet.pdf)