component
SZ1.5SMC15AT3G
Public Made by Adomby adom
Littelfuse TVS, SMC. 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
markdownSZ1.5SMC15AT3G
Littelfuse · TVS · SMC
SZ1.5SMC15AT3G from Littelfuse, in a SMC. 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 terminal of the unidirectional TVS, marked by the color band on the package and shown as pin 1 (Cathode) in the part marking diagram; for SZ1.5SMC15AT3G the working peak reverse voltage VRWM is 12.8 V with maximum reverse leakage of 5 µA at VRWM. |
| 2 | Anode | passive | Anode terminal of the unidirectional TVS, shown as pin 2 (Anode) in the part marking diagram; the series is rated for 1500 W peak pulse power at 1 ms (10 x 1000 µs, non-repetitive) and the device is clamped at 21.2 V at a peak pulse current of 71 A for the 15 V part. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | SMC |
| 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) | VBR | 14.3 | V | @ IT = 1 mA, TA = 25°C (Note 7) | 2 | ||
| Breakdown voltage (nom) | VBR | 15 | V | @ IT = 1 mA, TA = 25°C (Note 7) | 2 | ||
| Breakdown voltage (max) | VBR | 15.8 | V | @ IT = 1 mA, TA = 25°C (Note 7) | 2 | ||
| Maximum reverse leakage current | IR | 5 | µA | @ VRWM = 12.8 V | 2 | ||
| Clamping voltage | VC | 21.2 | V | @ IPP = 71 A (Note 8) | 2 | ||
| Maximum reverse peak pulse current | IPP | 71 | A | Surge current waveform per Figure 2 (Note 8) | 2 | ||
| Forward voltage | VF | 3.5 | V | @ IF = 100 A (Note 5) | 2 | ||
| Peak power dissipation | PPK | 1500 | W | @ TL = 25°C, pulse width = 1 ms (Note 1) | 1 | ||
| Forward surge current | IFSM | 200 | A | @ TA = 25°C, 1/2 sine wave, PW = 8.3 ms (Note 4) | 1 | ||
| Operating and storage temperature range | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Working peak reverse voltage | VRWM | 12.8 | V | 2 | |||
| Breakdown voltage temperature coefficient | MV BR | 0.084 | %/°C | 2 | |||
| DC power dissipation (lead) | PD | 4 | W | @ TL = 75°C, measured zero lead length (Note 2) | 1 | ||
| Derate above 75°C (lead) | 54.6 | mW/°C | Derate above TL = 75°C | 1 | |||
| Thermal resistance junction-to-lead | RθJL | 18.3 | °C/W | 1 | |||
| DC power dissipation (ambient) | PD | 0.75 | W | @ TA = 25°C, FR-4 minimum recommended footprint (Note 3) | 1 | ||
| Derate above 25°C (ambient) | 6.1 | mW/°C | Derate above TA = 25°C | 1 | |||
| Thermal resistance junction-to-ambient | RθJA | 165 | °C/W | FR-4 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 | Terminal Matte Tin-plated leads, Solderable per JESD22-B102 | 4 |
CAD (KiCad official)
- Symbol:
SZ1.5SMC15AT3G - Footprint:
Diode_SMD:D_SMC - 3D model: SMC (KiCad packages3D, STEP)
- 3D model files:
sz1-5smc15at3g-etched.step/sz1-5smc15at3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sz1-5smc15at3g.step/sz1-5smc15at3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (5 pp, sha256
c2c04b53fefd210a, retrieved 2026-10-28, 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).