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SZ1SMB13AT3G
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), SMB. 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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README
markdownSZ1SMB13AT3G
Littelfuse · ESD And Surge Protection (TVS/ESD) · SMB
SZ1SMB13AT3G from Littelfuse, in a SMB. 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 | Cathode of the uni-directional TVS, marked by the color band on the package; this device has a working peak reverse voltage (VRWM) of 13 V. |
| 2 | Anode | passive | Anode of the uni-directional TVS, the terminal opposite the color band; forward voltage is 3.5 V max at 30 A forward current (Note 5). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | SMB |
| 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 (uni-directional, part SZ1SMB13AT3G) | VBR | 14.4 | 15.15 | 15.9 | V | @ IT = 1.0 mA; Note 7: VBR measured at pulse test current IT at 25°C | 3 |
| Maximum reverse leakage current | IR | 5 | µA | @ VRWM = 13 V | 3 | ||
| Peak pulse power dissipation | PPK | 600 | W | @ TL = 25°C, pulse width = 1 ms (Note 1: 10/1000 µs, non-repetitive) | 1 | ||
| DC power dissipation, lead-measured | PD | 3 | W | @ TL = 75°C, measured zero lead length (Note 2: 1” square copper pad, FR-4) | 1 | ||
| DC power dissipation, ambient | PD | 0.55 | W | @ TA = 25°C (Note 3: FR-4, Littelfuse minimum recommended footprint) | 1 | ||
| Forward surge current (unidirectional only) | IFSM | 100 | A | @ TA = 25°C; 1/2 sine wave, PW = 8.3 ms, max 4 pulses per minute (Note 4) | 1 | ||
| Operating and storage temperature range | TJ, Tstg | -65 | 150 | °C | Operating junction and storage temperature | 1 | |
| Clamping voltage | VC | 21.5 | V | @ IPP = 27.9 A (Note 8: surge waveform per Figure 1, derate per Figure 3) | 3 | ||
| Derate above 75°C (DC power, lead-measured) | 40 | mW/°C | 1 | ||||
| Derate above 25°C (DC power, ambient) | 4.4 | mW/°C | 1 | ||||
| Thermal resistance, junction-to-lead | RƟJL | 25 | °C/W | Note 2: 1” square copper pad, FR-4 board | 1 | ||
| Thermal resistance, junction-to-ambient | RƟJA | 226 | °C/W | Note 3: FR-4 board, Littelfuse minimum recommended footprint | 1 |
CAD (KiCad official)
- Symbol:
SZ1SMB13AT3G - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
sz1smb13at3g-etched.step/sz1smb13at3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sz1smb13at3g.step/sz1smb13at3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (7 pp, sha256
b867ff8d1ae59140, retrieved 2026-10-15, 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).