component
1N4743ATR
Public Made by Adomby adom
onsemi 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
markdown1N4743ATR
onsemi · Zener Diodes · DO-41
1N4743ATR from onsemi, 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 | onsemi |
| 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 | VZ | 12.35 | 13 | 13.65 | V | IZ = 19 mA (Note 2); TL = 30°C ±1°C, 3/8″ lead length | 2 |
| Max. Zener impedance | ZZ | 10 | Ω | @ IZ = 19 mA | 2 | ||
| Max. Zener impedance at knee | ZZK | 700 | Ω | @ IZK = 0.25 mA | 2 | ||
| Leakage current | IR | 5 | µA | VR = 9.9 V | 2 | ||
| Non-repetitive peak reverse current | IZSM | 344 | mA | 8.3 ms square wave reverse surge (Note 3) | 2 | ||
| Power dissipation | PD | 1 | W | TL ≤ 50°C, lead length 3/8″; derate 6.67 mW/°C above 50°C | 1 | ||
| Operating and storage temperature range | TJ, TSTG | -65 | 200 | °C | 1 |
CAD (KiCad official)
- Symbol:
1N4743ATR - 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: onsemi datasheet (7 pp, sha256
57e694dd55afde6c, 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).