component
1N4728ATR
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
markdown1N4728ATR
onsemi · Zener Diodes · DO-41
1N4728ATR 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 | 3.135 | 3.3 | 3.465 | V | IZ = 76 mA, TL = 30°C ±1°C, 3/8" lead length | 2 |
| Max. Zener Impedance | ZZ | 10 | Ω | @ IZ = 76 mA | 2 | ||
| Max. Zener Impedance (knee) | ZZK | 400 | Ω | @ IZK = 1 mA | 2 | ||
| Leakage Current | IR | 100 | µA | VR = 1 V | 2 | ||
| Non-Repetitive Peak Reverse Current | IZSM | 1380 | mA | Square wave reverse surge at 8.3 ms soak time | 2 | ||
| Power Dissipation | PD | 1 | W | @ TL ≤ 50°C, Lead Length = 3/8″ | 1 | ||
| Power Dissipation Derating | PD | 6.67 | mW/°C | Derate above 50°C | 1 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 200 | °C | 1 |
CAD (KiCad official)
- Symbol:
1N4728ATR - 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
9e828b44fb88b41e, retrieved 2026-10-22, tier: manufacturer) - 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).