component

SZ1.5SMC20AT3G

Public Made by Adom

by adom

Littelfuse TVS, SMC. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttvs-fuse-board level protectionsz1.5smc20at3gfactory-2.0.0extractor-text

Verified SZ1.5SMC20AT3G

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier lcsc, 2 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SZ1.5SMC20AT3G · SMC · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: all 2 pin names found in the 5-page datasheet
  • ✓distributor: lcsc C1848542, digikey F11489TR-ND, mouser 863-SZ1.5SMC20AT3G
  • ✓family: D_SMC
  • ✓files: 6 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-qqttkb6v/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 1 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.4)
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 1 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ sz1-5smc20at3g.kicad_sym✓ sz1-5smc20at3g.kicad_mod✓ sz1-5smc20at3g.step
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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 9d ago
viewers sz1-5smc20at3g: viewers · Ray 9d ago
package.json Publish 0.1.0 · Ray 9d ago
page.json Set visibility: public · Ray 9d ago
README.md Publish 0.1.0 · Ray 9d ago
sz1-5smc20at3g-hero.glb Publish 0.1.0 · Ray 9d ago
sz1-5smc20at3g-hero.overlay.json Publish 0.1.0 · Ray 9d ago
sz1-5smc20at3g.glb Publish 0.1.0 · Ray 9d ago
sz1-5smc20at3g.kicad_mod Publish 0.1.0 · Ray 9d ago
sz1-5smc20at3g.kicad_sym Publish 0.1.0 · Ray 9d ago
sz1-5smc20at3g.lbr Publish 0.1.0 · Ray 9d ago
sz1-5smc20at3g.step Publish 0.1.0 · Ray 9d ago
verification.json Verified: Published by the parts factory: tier lcsc, 2 pins · Ray 9d ago

SZ1.5SMC20AT3G

Littelfuse · TVS · SMC

SZ1.5SMC20AT3G 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 of the unidirectional 1500 W TVS diode, marked by the color band on the package; connects to the protected positive line (VRWM 17.1 V, VBR 19-21 V at 1 mA).
2 Anode passive Anode of the unidirectional 1500 W TVS diode, connects to the return/ground side of the protected line.

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 VBR 19 20 21 V @ IT = 1 mA 2
Reverse Leakage Current IR 5 µA @ VRWM 2
Working Peak Reverse Voltage VRWM 17.1 V 2
Clamping Voltage VC 27.7 V @ IPP = 54 A 2
Forward Voltage VF 3.5 V @ IF = 100 A 2
Maximum Reverse Peak Pulse Current IPP 54 A 2
Breakdown Voltage Temperature Coefficient MVBR 0.09 %/°C TYP. 2
Peak Power Dissipation PPK 1500 W TL = 25°C, Pulse Width = 1 ms 1
DC Power Dissipation (lead) PD 4 W TL = 75°C, zero lead length 1
DC Power Dissipation (ambient) PD 0.75 W TA = 25°C, FR-4 board 1
Forward Surge Current IFSM 200 A TA = 25°C, 1/2 sine wave, PW = 8.3 ms 1
Operating and Storage Temperature Range TJ, Tstg -65 150 °C 1
Thermal Resistance Junction-to-Lead RθJL 18.3 °C/W 1
Thermal Resistance Junction-to-Ambient RθJA 165 °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 Terminal Matte Tin-plated leads, Solderable per JESD22-B102 4

CAD (KiCad official)

  • Symbol: SZ1.5SMC20AT3G
  • Footprint: Diode_SMD:D_SMC
  • 3D model: SMC (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Littelfuse datasheet (5 pp, sha256 c2c04b53fefd210a, retrieved 2026-10-31, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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