component
1N4737APF-M
Public Made by Adomby adom
ST Semtech Zener Diodes, DO-41. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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
markdown1N4737APF-M
ST Semtech · Zener Diodes · DO-41
1N4737APF-M from ST Semtech, in a DO-41. 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 | ST Semtech |
| Package | DO-41 |
| 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 7.5 V) | VZ | 7.12 | 7.5 | 7.88 | V | at IZT = 34 mA; DC test, thermal equilibrium | 2 |
| Maximum Zener impedance | rZJT | 4 | Ω | at IZT = 34 mA; 60 Hz AC at 10% of IZT rms | 2 | ||
| Maximum Zener impedance (knee) | rZJK | 700 | Ω | at IZK = 0.5 mA | 2 | ||
| Maximum reverse leakage current | IR | 10 | µA | at VR = 5 V | 2 | ||
| Maximum surge current | IZSM | 605 | mA | peak non-repetitive reverse surge, 1/120 s half sine superimposed on IZT (note 4) | 2 | ||
| Maximum regulator current | IZM | 121 | mA | 2 | |||
| Forward voltage | VF | 1.2 | V | at IF = 200 mA | 1 | ||
| Power dissipation | Ptot | 1 | W | valid provided leads at 8 mm from case are kept at ambient temperature | 1 | ||
| Junction temperature | Tj | 200 | °C | 1 | |||
| Storage temperature range | TS | -65 | 200 | °C | 1 | ||
| Thermal resistance junction to ambient air | RthA | 170 | K/W | valid provided leads at 8 mm from case are kept at ambient temperature | 1 |
CAD (KiCad official)
- Symbol:
1N4737APF-M - Footprint:
Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal - 3D model: DO-41 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (4 pp, sha256
b4504508e5b23338, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).