component

SMAJ78CA

Public Made by Adom

by adom

RUILON(Shenzhen Ruilongyuan Elec) TVS, DO-214AC(SMA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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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SMAJ78CA

RUILON(Shenzhen Ruilongyuan Elec) · TVS · DO-214AC(SMA)

SMAJ78CA from RUILON(Shenzhen Ruilongyuan Elec), in a DO-214AC(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 K passive Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer RUILON(Shenzhen Ruilongyuan Elec)
Package DO-214AC(SMA)
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 86.7 V IT = 1 mA 3
Breakdown Voltage (max) VBR 99.7 V IT = 1 mA 3
Reverse Stand-Off Voltage VRWM 78 V 3
Maximum Clamping Voltage VC 126 V IPP = 3.2 A 3
Reverse Leakage Current IR 1 µA @VRWM 3
Peak Pulse Power Dissipation PPPM 400 Watts TA=25°C by 10/1000µs waveform (Fig.2) (Note 1), (Note 2) 2
Power Dissipation on Infinite Heat Sink PD 3.3 Watts TA=50°C 2
Operating junction and Storage Temperature Range TJ,TSTG -55 150 °C 2
Typical Thermal Resistance Junction to Lead RuJL 30 °C/W 2
Typical Thermal Resistance Junction to Ambient RuJA 120 °C/W 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 • Halogen ree and RoHS compliant 2

CAD (KiCad official)

  • Symbol: SMAJ78CA
  • Footprint: Diode_SMD:D_SMA
  • 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
  • 3D model files: smaj78ca-etched.step / smaj78ca-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smaj78ca.step / smaj78ca.glb are the bare package body.

Provenance

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

  • Datasheet: RUILON(Shenzhen Ruilongyuan Elec) datasheet (7 pp, sha256 b87d4a282e3c8c8c, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band convention (convention), consensus off (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