component
SML4744A-E3
Public Made by Adomby adom
Vishay Intertech Zener Diodes, DO-214AC(SMA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SML4744A-E3
Vishay Intertech · Zener Diodes · DO-214AC(SMA)
SML4744A-E3 from Vishay Intertech, in a DO-214AC(SMA). 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 terminal marked by the cathode band; for the SML4744A it goes positive in Zener (reverse) operation, with a nominal VZ of 15 V at IZT 17 mA (±5 % tolerance for the A suffix). |
| 2 | A | passive | Anode, the terminal opposite the cathode band; the 1000 mW (TL = 75 °C) power dissipation limit applies to the device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | DO-214AC(SMA) |
| 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 (suffix A) | VZ | -5 | 5 | % | Standard voltage tolerance is ± 10 %, suffix A ± 5 % | 1 | |
| Reverse current | IR | 5 | μA | at VR = 11.4 V | 2 | ||
| Dynamic resistance | ZZ | 14 | Ω | at IZT1 = 17 mA | 2 | ||
| Dynamic resistance (knee) | ZZK | 700 | Ω | at IZT2 = 0.25 mA | 2 | ||
| Surge current | IRM | 305 | mApk | Non-repetitive, 8.3 ms pulse width square wave or equivalent sine-wave superimposed on IZT | 2 | ||
| Power dissipation | Ptot | 1000 | mW | TL = 75 °C | 1 | ||
| Junction temperature | Tj | 150 | °C | 1 | |||
| Storage temperature range | Tstg | -65 | 150 | °C | 1 | ||
| Zener voltage nominal | VZ | 15 | V | at IZT1 | 2 | ||
| Test current | IZT1 | 17 | mA | 2 | |||
| Test current (knee) | IZT2 | 0.25 | mA | 2 |
CAD (KiCad official)
- Symbol:
SML4744A-E3 - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
sml4744a-e3-etched.step/sml4744a-e3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sml4744a-e3.step/sml4744a-e3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Vishay Intertech datasheet (5 pp, sha256
02ddb86d0bf728a4, retrieved 2026-10-22, tier: manufacturer) - 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).
# SML4744A-E3
**Vishay Intertech** · Zener Diodes · DO-214AC(SMA)
SML4744A-E3 from Vishay Intertech, in a DO-214AC(SMA). 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 terminal marked by the cathode band; for the SML4744A it goes positive in Zener (reverse) operation, with a nominal VZ of 15 V at IZT 17 mA (±5 % tolerance for the A suffix). |
| 2 | A | passive | Anode, the terminal opposite the cathode band; the 1000 mW (TL = 75 °C) power dissipation limit applies to the device. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | DO-214AC(SMA) |
| 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 (suffix A) | VZ | -5 | | 5 | % | Standard voltage tolerance is ± 10 %, suffix A ± 5 % | 1 |
| Reverse current | IR | | | 5 | μA | at VR = 11.4 V | 2 |
| Dynamic resistance | ZZ | | | 14 | Ω | at IZT1 = 17 mA | 2 |
| Dynamic resistance (knee) | ZZK | | | 700 | Ω | at IZT2 = 0.25 mA | 2 |
| Surge current | IRM | | | 305 | mApk | Non-repetitive, 8.3 ms pulse width square wave or equivalent sine-wave superimposed on IZT | 2 |
| Power dissipation | Ptot | | | 1000 | mW | TL = 75 °C | 1 |
| Junction temperature | Tj | | | 150 | °C | | 1 |
| Storage temperature range | Tstg | -65 | | 150 | °C | | 1 |
| Zener voltage nominal | VZ | | 15 | | V | at IZT1 | 2 |
| Test current | IZT1 | | 17 | | mA | | 2 |
| Test current (knee) | IZT2 | | 0.25 | | mA | | 2 |
## CAD (KiCad official)
- Symbol: `SML4744A-E3`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `sml4744a-e3-etched.step` / `sml4744a-e3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sml4744a-e3.step` / `sml4744a-e3.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Vishay Intertech datasheet](docs/sml4744a-e3-datasheet.pdf) (5 pp, sha256 `02ddb86d0bf728a4`, retrieved 2026-10-22, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/sml4744a-e3-datasheet.pdf)