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HMMSZ5242BT1G

Public Made by Adom

by adom

HXY MOSFET Zener Diodes, SOD-123. 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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HMMSZ5242BT1G

HXY MOSFET · Zener Diodes · SOD-123

HMMSZ5242BT1G from HXY MOSFET, in a SOD-123. 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, marked by the marking bar on the package; this side goes positive for zener (reverse) operation, with 500 mW power dissipation on ceramic PCB.
2 A passive Anode, the end opposite the marking bar; forward voltage is 0.85 V at IF = 10 mA.

Key specifications

Parameter Value
Manufacturer HXY MOSFET
Package SOD-123
Category Diodes
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
Zener voltage (nominal 12 V, Min) VZ 11.76 12 12.24 V Ta=25℃ unless otherwise specified; IZT not reliably aligned in extracted text 2
Power dissipation PD 500 mW Device mounted on ceramic PCB; 5.0mm×7.0mm with pad areas 35 mm2 1
Forward voltage VF 0.85 V @IF = 10mA 1
Junction temperature Tj 150 ℃ 1
Storage temperature range Tstg -55 150 ℃ 1
Thermal resistance, junction to ambient air RθJA 556 ℃/W Device mounted on ceramic PCB; 5.0mm×7.0mm with pad areas 35 mm2 1

CAD (KiCad official)

  • Symbol: HMMSZ5242BT1G
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: hmmsz5242bt1g-etched.step / hmmsz5242bt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hmmsz5242bt1g.step / hmmsz5242bt1g.glb are the bare package body.

Provenance

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

  • Datasheet: HXY MOSFET datasheet (5 pp, sha256 0ce80cd1655e5204, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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