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SMDJ45A

Public Made by Adom

by adom

TWGMC ESD And Surge Protection (TVS/ESD), DO-214AB(SMC). 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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SMDJ45A

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

SMDJ45A 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 of the unidirectional TVS (SMDJ45A); for bipolar CA parts the datasheet lists the same pin 1 designation.
2 Anode passive Anode terminal of the TVS; SMDJ45A has 45.0V stand-off voltage, 50V to 55.3V breakdown at 1mA, and 72.7V max clamping at 41.3A peak pulse current.

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
Reverse Stand-off Voltage VRWM 45 V SMDJ45A 2
Breakdown Voltage VBR 50 55.3 V @ IT = 1 mA 2
Max Clamp Voltage VC 72.7 V @ IPP = 41.3 A 2
Max Peak Pulse Current IPP 41.3 A 2
Max Reverse Leakage IR 2 uA @ VR 2
Peak Pulse Power Dissipation PPPM 3000 W TA=25°C, 10x1000 us waveform 1
Steady State Power Dissipation PM(AV) 6.5 W On infinite heat sink at TA=50°C 1
Peak Forward Surge Current IFSM 300 A 8.3ms single half sine wave, unidirectional only 1
Maximum Instantaneous Forward Voltage VF 3.5 V at 100A, unidirectional only 1
Operating Junction and Storage Temperature Range Tj, TSTG -65 150 °C 1
Typical Thermal Resistance Junction to Lead RθJL 15 °C/W 1
Typical Thermal Resistance Junction to Ambient RθJA 75 °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 Matte Tin Lead-free Plated Maximum Ratings and Thermal Characteristics (TA=25℃ unless otherwise noted) 1

CAD (KiCad official)

  • Symbol: SMDJ45A
  • Footprint: Diode_SMD:D_SMC
  • 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
  • 3D model files: smdj45a-etched.step / smdj45a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smdj45a.step / smdj45a.glb are the bare package body.

Provenance

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

  • Datasheet: TWGMC datasheet (4 pp, sha256 07b07d63a3938379, 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