component

SMCJ54A

Public Made by Adom

by adom

Littelfuse TVS, DO-214AB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentcircuit protectionsmcj54afactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
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 10d ago
viewers smcj54a: viewers · Ray 10d ago
package.json Publish 0.1.0 · Ray 10d ago
page.json Set visibility: public · Ray 10d ago
README.md Publish 0.1.0 · Ray 10d ago
smcj54a-etched.glb Publish 0.1.0 · Ray 10d ago
smcj54a-etched.step smcj54a: factory component page (tier=lcsc) · Ray 10d ago
smcj54a-hero.glb smcj54a: hero GLB from the etched model (keeps the MPN mark) · Ray 10d ago
smcj54a-hero.overlay.json Publish 0.1.0 · Ray 10d ago
smcj54a.glb Publish 0.1.0 · Ray 10d ago
smcj54a.kicad_mod Publish 0.1.0 · Ray 10d ago
smcj54a.kicad_sym Publish 0.1.0 · Ray 10d ago
smcj54a.lbr Publish 0.1.0 · Ray 10d ago
smcj54a.step Publish 0.1.0 · Ray 10d ago

SMCJ54A

Littelfuse · TVS · DO-214AB

SMCJ54A from Littelfuse, in a DO-214AB. 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 K passive Cathode, the end marked by the color band on the unidirectional SMCJ54A (VR 54.0 V, VBR 60.0-66.3 V at 1 mA, VC 87.1 V at 17.3 A Ipp).
2 A passive Anode, the end opposite the cathode band; the unidirectional SMCJ54A conducts in forward direction with VF below 3.5 V at 100 A.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package DO-214AB
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
Reverse Stand-off Voltage VR 54 V 2
Breakdown Voltage VBR 60 66.3 V @ IT = 1 mA 2
Test Current IT 1 mA 2
Maximum Clamping Voltage VC 87.1 V @ Ipp = 17.3 A 2
Maximum Peak Pulse Current Ipp 17.3 A 2
Maximum Reverse Leakage IR 1 µA @ VR 2
Peak Pulse Power Dissipation PPPM 1500 W TA=25ºC, 10/1000µs waveform 1
Power Dissipation on Infinite Heat Sink PD 6.5 W TL=50°C 1
Peak Forward Surge Current IFSM 200 A 8.3ms single half sine wave, unidirectional only 1
Maximum Instantaneous Forward Voltage VF 3.5 V at 100A, unidirectional only; 3.5 single die / 5.0 stacked-die 1
Operating Temperature Range TJ -65 150 °C 1
Storage Temperature Range TSTG -65 175 °C 1
Typical Thermal Resistance Junction to Lead RθJL 15 °C/W 1
Typical Thermal Resistance Junction to Ambient RθJA 75 °C/W 1
Breakdown Voltage Temperature Coefficient αT 0.1 % typical value 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 copper 2. Mounted on copper pad area of 0.31x0.31” (8.0 x 8.0mm) to each terminal. 1

CAD (KiCad official)

  • Symbol: SMCJ54A
  • Footprint: Diode_SMD:D_SMC
  • 3D model: DO-214AB (KiCad packages3D, STEP)
  • 3D model files: smcj54a-etched.step / smcj54a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smcj54a.step / smcj54a.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (6 pp, sha256 6e610db955ed8763, retrieved 2026-10-22, 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