component

ASMBJ51CA

Public Made by Adom

by adom

PTTC(Polytronics Tech) ESD And Surge Protection (TVS/ESD), SMB. 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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ASMBJ51CA

PTTC(Polytronics Tech) · ESD And Surge Protection (TVS/ESD) · SMB

ASMBJ51CA from PTTC(Polytronics Tech), in a SMB. 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 A1 passive Bi-directional TVS terminal 1 (no cathode band), interchangeable with terminal 2, VR 51.0 V stand-off and VBR 56.7-62.7 V at 1 mA.
2 A2 passive Bi-directional TVS terminal 2 (no cathode band), interchangeable with terminal 1, maximum clamping voltage 82.4 V at IPP 7.3 A.

Key specifications

Parameter Value
Manufacturer PTTC(Polytronics Tech)
Package SMB
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 51 V 3
Breakdown Voltage VBR 56.7 62.7 V @ IT = 1 mA 3
Maximum Clamping Voltage VC 82.4 V @ IPP = 7.3 A 3
Maximum Peak Pulse Current IPP 7.3 A 3
Maximum Reverse Leakage IR 1 A @ VR 3
Peak Pulse Power Dissipation PPPM 600 Watt 10/1000s waveform 1
Steady State Power Dissipation PM(AV) 5 Watt TL = 75°C, lead lengths 0.375” (9.5mm) 1
Peak Forward Surge Current IFSM 100 Amp 8.3 ms single half sine wave superimposed on rated load 1
Operating Junction and Storage Temperature Range TJ, TSTG -55 150 °C 1
VBR Voltage tolerance -5 5 % Part code A 1
Test Current IT 1 mA VBR test 3
Reflow Peak Temperature 260 ºC Lead free reflow 5

CAD (KiCad official)

  • Symbol: ASMBJ51CA
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: asmbj51ca-etched.step / asmbj51ca-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); asmbj51ca.step / asmbj51ca.glb are the bare package body.

Provenance

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

  • Datasheet: PTTC(Polytronics Tech) datasheet (6 pp, sha256 b85798a40e48d412, 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