component
1N4744ATR
Public Made by Adomby adom
onsemi 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
markdown1N4744ATR
onsemi · Zener Diodes · DO-41
1N4744ATR 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 lead, marked by the cathode identification band on the DO-41 body; for the 1N4744A the nominal Zener voltage is 15 V at IZT = 17 mA. |
| 2 | A | passive | Anode lead at the opposite end of the DO-41 body from the cathode band; Ptot is 1300 mW provided the leads 4 mm from the case are kept at ambient temperature. |
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 tolerance | VZ | -5 | 5 | % | Standard Zener voltage tolerance | 1 | |
| Nominal Zener voltage | VZ | 15 | V | at IZT1 = 17 mA | 2 | ||
| Test current | IZT1 | 17 | mA | 2 | |||
| Test current (knee) | IZT2 | 0.25 | mA | 2 | |||
| Reverse leakage current | IR | 5 | μA | at VR = 11.4 V | 2 | ||
| Dynamic resistance | ZZT | 14 | Ω | at IZT1, f = 1 kHz | 2 | ||
| Dynamic resistance (knee) | ZZK | 700 | Ω | at IZT2, f = 1 kHz | 2 | ||
| Surge current | IR | 304 | mA | tp = 10 ms | 2 | ||
| Regulator current | IZM | 61 | mA | Electrodes at 4 mm from case kept at ambient temperature | 2 | ||
| Forward voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| Power dissipation | Ptot | 1300 | mW | Leads at 4 mm from case kept at ambient temperature, Tamb = 25 °C | 1 | ||
| Junction temperature | Tj | 175 | °C | 1 | |||
| Storage temperature range | Tstg | -65 | 175 | °C | 1 | ||
| Thermal resistance junction to ambient air | RthJA | 110 | K/W | Leads at 4 mm from case kept at ambient temperature | 1 |
CAD (KiCad official)
- Symbol:
1N4744ATR - 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 (4 pp, sha256
7bbd9a9221a814f6, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).