component
HMMSZ5242BT1G
Public Made by Adomby adom
HXY MOSFET Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHMMSZ5242BT1G
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hmmsz5242bt1g.step/hmmsz5242bt1g.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).