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SMDJ51CA

Public Made by Adom

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TWGMC ESD And Surge Protection (TVS/ESD), DO-214AB(SMC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentcircuit protectionsmdj51cafactory-2.0.0extractor-text

Verified SMDJ51CA

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 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: SMDJ51CA · DO-214AB(SMC) · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: all 2 pin names found in the 4-page datasheet
  • •distributor (warn): no ['digikey'] number
  • ✓family: D_SMC
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-ue0adedd/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ smdj51ca.kicad_sym✓ smdj51ca.kicad_mod✓ smdj51ca.step
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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

markdown

SMDJ51CA

TWGMC · ESD And Surge Protection (TVS/ESD) · DO-214AB(SMC)

SMDJ51CA from TWGMC, in a DO-214AB(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 per the PINNING table; SMDJ51CA is the bipolar (CA) version with 51V stand-off voltage and 3000W peak pulse power.
2 Anode passive Anode terminal per the PINNING table; SMDJ51CA is the bipolar (CA) version with 51V stand-off voltage and 3000W peak pulse power.

Key specifications

Parameter Value
Manufacturer TWGMC
Package DO-214AB(SMC)
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 min VBR 56.7 V IT = 1 mA test current 2
Breakdown voltage max VBR 66.3 V IT = 1 mA test current 2
Max clamp voltage VC 87.1 V at IPP = 36.4 A, 10/1000us waveform 2
Max peak pulse current IPP 36.4 A 10/1000us waveform 2
Max reverse leakage current IR 2 uA at VR = 51 V (reverse stand-off voltage) 2
Peak pulse power dissipation PPPM 3000 W 10x1000 us waveform, TA=25°C, Fig.1 (Notes 1, 2) 1
Power dissipation on infinite heat sink PM(AV) 6.5 W TA=50°C 1
Peak forward surge current IFSM 300 A 8.3ms single half sine wave (Note 3) 1
Operating junction and storage temperature range Tj TSTG -65 150 ℃ 1
Typical thermal resistance junction to lead RθJL 15 ℃/W junction to lead 1
Typical thermal resistance junction to ambient RθJA 75 ℃/W junction to ambient 1
Reverse stand-off voltage VRWM 51 V SMDJ51CA reverse stand-off voltage 2

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 Matte Tin Lead-free Plated Maximum Ratings and Thermal Characteristics (TA=25℃ unless otherwise noted) 1

CAD (KiCad official)

  • Symbol: SMDJ51CA
  • Footprint: Diode_SMD:D_SMC
  • 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
  • 3D model files: smdj51ca-etched.step / smdj51ca-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smdj51ca.step / smdj51ca.glb are the bare package body.

Provenance

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

  • Datasheet: TWGMC datasheet (4 pp, sha256 f5c37809f3c98383, retrieved 2026-11-06, 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