component
1N4728A
Public Made by Adomby adom
Nexperia Zener Diodes, DO-41. 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
markdown1N4728A
Nexperia · Zener Diodes · DO-41
1N4728A from Nexperia, 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 | cathode | passive | Cathode, identified by the marking band on the package (the marking band indicates the cathode). |
| 2 | anode | passive | Anode, the terminal opposite the cathode marking band, per the graphic symbol (k and a) in the pinning table. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| 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 |
|---|---|---|---|---|---|---|---|
| Working current | IZ | 276 | mA | 4 | |||
| Non-repetitive peak reverse current | IZSM | 1380 | mA | Half square wave or equivalent sine wave pulse 1/120 s superimposed on Itest | 4 | ||
| Differential resistance | rdif | 10 | Ω | at Itest (76 mA) | 4 | ||
| Differential resistance | rdif | 400 | Ω | at IZ = 1 mA | 4 | ||
| Reverse current | IR | 100 | µA | at VR = 1 V | 4 | ||
| Working voltage tolerance | VZ | -5 | 5 | % | Tolerance series ±5% (series statement, Features; applies to 1N4728A) | 1 | |
| Forward voltage | VF | 1.2 | V | IF = 200 mA | 3 | ||
| Forward current | IF | 500 | mA | 2 | |||
| Total power dissipation | Ptot | 1000 | mW | Tamb = 50 °C | 2 | ||
| Junction temperature | Tj | -65 | 200 | °C | 2 | ||
| Storage temperature | Tstg | -65 | 200 | °C | 2 | ||
| Thermal resistance from junction to tie-point | Rth(j-t) | 110 | K/W | lead length 4 mm | 3 | ||
| Working voltage (nominal) | VZ | 3.3 | V | Itest = 76 mA | 4 |
CAD (KiCad official)
- Symbol:
1N4728A - 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: Nexperia datasheet (10 pp, sha256
65bff8381f8f1f77, retrieved 2026-10-14, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).