component
1N4744APF-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
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdown1N4744APF-M
ST(Semtech) · Zener Diodes · DO-41
1N4744APF-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 (1N4744APF, nominal 15 V, ±5%) | VZT | 14.25 | 15 | 15.75 | V | at IZT 17 mA | 2 |
| Dynamic resistance | ZZT | 14 | Ω | at IZT 17 mA | 2 | ||
| Dynamic resistance at knee | ZZK | 700 | Ω | at IZK 0.25 mA | 2 | ||
| Reverse current | IR | 5 | µA | at VR 11.4 V | 2 | ||
| Maximum surge current | IZSM | 304 | mA | maximum peak, non-repetitive reverse surge current of 1/2 square wave or equivalent sine wave pulse of 1/120 s superimposed on IZT | 2 | ||
| Maximum regulator current | IZM | 61 | mA | leads at 8 mm from case kept at ambient temperature | 2 | ||
| Temperature coefficient | 0.055 | 0.09 | %/°C | printed as '0.055 to 0.09'; lower-bound sign not printed | 2 | ||
| Forward voltage | VF | 1.2 | V | at IF = 200 mA | 2 | ||
| Power dissipation | Ptot | 1 | W | leads at 8 mm from case kept at ambient temperature | 1 | ||
| Junction temperature | Tj | 175 | ℃ | 1 | |||
| Storage temperature range | Tstg | -65 | 175 | ℃ | 1 | ||
| Thermal resistance junction to ambient | RθJA | 150 | ℃/W | leads at 8 mm from case kept at ambient temperature | 1 |
CAD (KiCad official)
- Symbol:
1N4744APF-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 (3 pp, sha256
4b0aaf964c54ea10, retrieved 2026-10-21, 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).