component
SZ1SMA15CAT3G
Public Made by Adomby adom
Littelfuse Electrostatic And Surge Protection (TVS/ESD), SMA. Pinout cross-checked by two models against the datasheet, 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
markdownSZ1SMA15CAT3G
Littelfuse · Electrostatic And Surge Protection (TVS/ESD) · SMA
SZ1SMA15CAT3G 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 | A1 | passive | Bi-directional terminal (labelled Cathode on the uni-directional package drawing); SZ1SMA15CAT3G has VRWM 15 V, VBR 16.70-18.46 V at 1 mA, and VC 24.4 V at 16.4 A, with no polarity band. |
| 2 | A2 | passive | Bi-directional terminal (labelled Anode on the uni-directional package drawing); interchangeable with pin 1, with IR max 2.5 µA at VRWM 15 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | SMA |
| Category | TVS/Fuse/Board Level 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 / NOM / MAX) | VBR | 16.7 | 17.58 | 18.46 | V | @ IT = 1 mA test current | 4 |
| Maximum Reverse Leakage Current | IR | 2.5 | µA | @ VRWM | 4 | ||
| Maximum Reverse Peak Pulse Current | IPP | 16.4 | A | Surge per Figure 2, derate per Figure 3 (Note 8) | 4 | ||
| Peak Power Dissipation | PPK | 400 | W | @ TL = 25°C, pulse width = 1 ms (Note 1) | 1 | ||
| DC Power Dissipation | PD | 1.5 | W | @ TL = 75°C, measured zero lead length (Note 2) | 1 | ||
| DC Power Dissipation | PD | 0.5 | W | @ TA = 25°C (Note 3) | 1 | ||
| Operating and Storage Temperature Range | TJ, Tstg | -65 | 175 | °C | 1 | ||
| Clamping Voltage | VC | 24.4 | V | @ IPP = 16.4 A | 4 | ||
| Working Peak Reverse Voltage | VRWM | 15 | V | 4 | |||
| Thermal Resistance, Junction-to-Lead | RθJL | 50 | °C/W | Note 2: 1 in square copper pad, FR-4 board | 1 | ||
| Thermal Resistance, Junction-to-Ambient | RθJA | 120 | °C/W | Note 3: FR-4 board, minimum recommended footprint | 1 | ||
| Power Derating Above TL | PD | 20 | mW/°C | Derate above 75°C (TL) | 1 | ||
| Power Derating Above TA | PD | 4 | mW/°C | Derate above 25°C (TA) | 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-STD609A.01) | 1 |
CAD (KiCad official)
- Symbol:
SZ1SMA15CAT3G - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
sz1sma15cat3g-etched.step/sz1sma15cat3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sz1sma15cat3g.step/sz1sma15cat3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (7 pp, sha256
28d8bdc1607bd94e, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).