component
1N4756ATA
Public Made by Adomby adom
Tak Cheong 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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Contents
README
markdown1N4756ATA
Tak Cheong · Zener Diodes · DO-41
1N4756ATA from Tak Cheong, 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 terminal of the 1N4756A zener diode, identified by the polarity band on the hermetically sealed glass body, and the regulator is rated 1 W maximum steady-state dissipation at TL ≤ 50 °C with 3/8" lead length. |
| 2 | Anode | passive | Anode terminal of the zener diode, at the end of the body opposite the polarity band, with the device rated for operating and storage temperature of -65 to +200 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Tak Cheong |
| 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 (1N4756A, ±5% type) | VZ | 44.65 | 47 | 49.35 | V | @IZT = 5.5 mA; pulse test (Notes 2 & 3) | 2 |
| Leakage current | IR | 5 | uA | @VR = 35.8 V | 2 | ||
| Forward voltage | VF | 2 | V | @IF = 200 mA; for 30~56V types | 2 | ||
| Zener voltage tolerance (A suffix) | -5 | 5 | % | Standard tolerance on nominal VZ per type-number designation | 2 | ||
| Maximum steady state power dissipation | PD | 1 | W | @TL≤50℃, Lead Length = 3/8” | 1 | ||
| Power derating above 50℃ | PD | 6.67 | mW/℃ | Derate above 50℃, lead length 3/8” | 1 | ||
| Operating and storage temperature range | TJ, Tstg | -65 | 200 | °C | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | § Solder Hot Dip Tin (Sn) Lead Finish Specification Features: | 1 |
CAD (KiCad official)
- Symbol:
1N4756ATA - 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: Tak Cheong datasheet (3 pp, sha256
20c61d98f60a9f32, retrieved 2026-10-21, 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).