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SZ1SMA15CAT3G

Public Made by Adom

by adom

Littelfuse Electrostatic And Surge Protection (TVS/ESD), SMA. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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sz1sma15cat3g-etched.glb Publish 0.1.0 · Ray 8d ago
sz1sma15cat3g-etched.step sz1sma15cat3g: factory component page (tier=lcsc) · Ray 8d ago
sz1sma15cat3g-hero.glb sz1sma15cat3g: hero GLB from the etched model (keeps the MPN mark) · Ray 8d ago
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SZ1SMA15CAT3G

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-STD￾609A.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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sz1sma15cat3g.step / sz1sma15cat3g.glb are 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF