component
SZ1SMA58CAT3G
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), SMA. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownSZ1SMA58CAT3G
Littelfuse · ESD And Surge Protection (TVS/ESD) · SMA
SZ1SMA58CAT3G 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 | Cathode | passive | Terminal 1, labeled Cathode on the part marking diagram; the cathode color band marks uni-directional devices only, and for the bi-directional CA device this terminal is electrically equivalent to the anode, so its polarity is not defined. |
| 2 | Anode | passive | Terminal 2, labeled Anode on the part marking diagram; for the bi-directional SZ1SMA58CAT3G both terminals conduct in either polarity, so this pin carries the same transient clamping function as pin 1. |
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 |
|---|---|---|---|---|---|---|---|
| Operating and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Breakdown Voltage (bi-directional, 58 V) | VBR | 64.4 | 67.79 | 71.18 | V | @ IT = 1 mA (Note 7, TA = 25°C) | 4 |
| Maximum Reverse Leakage Current | IR | 2.5 | µA | @ VRWM = 58 V (Note 6) | 4 | ||
| Maximum Reverse Peak Pulse Current | IPP | 4.3 | A | Surge waveform per Figure 2 and derate per Figure 3 (Note 8) | 4 | ||
| Peak Power Dissipation | PPK | 400 | W | TL = 25°C, Pulse Width = 1 ms (10 x 1000 µs, non-repetitive, Note 1) | 1 | ||
| DC Power Dissipation @ TL = 75°C | PD | 1.5 | W | Measured Zero Lead Length (Note 2) | 1 | ||
| DC Power Dissipation @ TA = 25°C | PD | 0.5 | W | FR-4 board, Littelfuse minimum recommended footprint (Note 3) | 1 | ||
| Clamping Voltage @ IPP | VC | 93.6 | V | @ IPP = 4.3 A (Note 8) | 4 | ||
| Thermal Resistance from Junction-to-Lead | RƟJL | 50 | °C/W | 1 | |||
| Thermal Resistance from Junction-to-Ambient | RƟJA | 250 | °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 | and the terminal finish material is tin(Sn) (IPC/ | 1 |
CAD (KiCad official)
- Symbol:
SZ1SMA58CAT3G - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
sz1sma58cat3g-etched.step/sz1sma58cat3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sz1sma58cat3g.step/sz1sma58cat3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (7 pp, sha256
2dcbd1b5c6bf6a05, retrieved 2026-10-16, 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).