component
SZ1SMA48AT3G
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.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 11d ago |
| viewers | 1d ago |
| package.json | 11d ago |
| page.json | 11d ago |
| README.md | 11d ago |
| sz1sma48at3g-etched.glb | 11d ago |
| sz1sma48at3g-etched.step | 11d ago |
| sz1sma48at3g-hero.glb | 11d ago |
| sz1sma48at3g-hero.overlay.json | 11d ago |
| sz1sma48at3g.glb | 11d ago |
| sz1sma48at3g.kicad_mod | 11d ago |
| sz1sma48at3g.kicad_sym | 1d ago |
| sz1sma48at3g.lbr | 1d ago |
| sz1sma48at3g.step | 11d ago |
SZ1SMA48AT3G
Littelfuse · ESD And Surge Protection (TVS/ESD) · SMA
SZ1SMA48AT3G 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 | Cathode, identified by the polarity band or notch; the SZ1SMA48AT3G is a uni-directional device with working peak reverse voltage VRWM of 48 V and breakdown voltage of 53.3 V to 58.9 V. |
| 2 | Anode | passive | Anode of the uni-directional TVS diode, which protects voltage-sensitive components from transients at a peak pulse power of 400 W (10 x 1000 µs). |
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 | VBR | 53.3 | 56.1 | 58.9 | V | @ IT = 1 mA (Note 7) | 3 |
| Maximum Reverse Leakage Current | IR | 2.5 | µA | @ VRWM | 3 | ||
| Maximum Reverse Peak Pulse Current | IPP | 5.2 | A | 3 | |||
| Clamping Voltage | VC | 77.4 | V | @ IPP 5.2 A (Note 8) | 3 | ||
| Junction Capacitance | C | 265 | pF | Bias voltage = 0 V, F = 1.0 MHz, TJ = 25°C (Note 9) | 3 | ||
| Working Peak Reverse Voltage | VRWM | 48 | V | Note 6 | 3 | ||
| Peak Power Dissipation | PPK | 400 | W | TL = 25°C, pulse width 1 ms (Note 1) | 1 | ||
| DC Power Dissipation | PD | 1 | W | DC, TL = 75°C, measured zero lead length (Note 2) | 1 | ||
| Derate Above 75°C | PD | 20 | mW/°C | Above TL = 75°C | 1 | ||
| Thermal Resistance Junction-to-Lead | RθJL | 50 | °C/W | Measured zero lead length (Note 2) | 1 | ||
| DC Power Dissipation | PD | 0.5 | W | TA = 25°C (Note 3) | 1 | ||
| Derate Above 25°C | PD | 4 | mW/°C | Above TA = 25°C | 1 | ||
| Thermal Resistance Junction-to-Ambient | RθJA | 250 | °C/W | FR-4 board, minimum recommended footprint (Note 3) | 1 | ||
| Forward Surge Current | IFSM | 40 | 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 |
CAD (KiCad official)
- Symbol:
SZ1SMA48AT3G - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
sz1sma48at3g-etched.step/sz1sma48at3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sz1sma48at3g.step/sz1sma48at3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (5 pp, sha256
0efc269c31859c3d, retrieved 2026-10-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusoff(skipped (clean text read)), 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).