component
1SMA4744
Public Made by Adomby adom
amsem Zener Diodes, DO-214AC(SMA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
1SMA4744
amsem · Zener Diodes · DO-214AC(SMA)
1SMA4744 from amsem, 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | amsem |
| 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 |
|---|---|---|---|---|---|---|---|
| Forward voltage | VF | 1.2 | V | IF = 200 mA (all types) | 2 | ||
| Maximum Zener impedance (at IZT) | ZZT | 14 | Ohms | @ IZT = 17 mA | 2 | ||
| Maximum Zener impedance (at IZK) | ZZK | 700 | Ohms | @ IZK = 0.25 mA | 2 | ||
| Zener voltage tolerance | -10 | 10 | % | Standard tolerance, no suffix A (suffix A = 5%) | 1 | ||
| Peak power dissipation | PD | 1 | W | TA = 50°C (Note 1: mounted on 5.0 mm² land areas) | 1 | ||
| Peak forward surge current | IFSM | 10 | A | 8.3 ms single half sine-wave superimposed on rated load (JEDEC), Note 2 | 1 | ||
| Operating and storage temperature range | TJ, TSTG | -55 | 150 | °C | 1 | ||
| Nominal Zener voltage | VZ | 15 | V | @ IZT = 17 mA (test current) | 2 | ||
| Reverse leakage current | IR | 5 | uA | @ VR = 11.4 V | 2 | ||
| Surge current (Ir) | Ir | 304 | mA | TA = 25°C | 2 | ||
| Power derating above 50°C | PD | 6.67 | mW/°C | derate above TA = 50°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 | Terminals: Pure tin plated lead free, solderable per MIL-STD-750, Method 2025 | 1 |
CAD (KiCad official)
- Symbol:
1SMA4744 - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
1sma4744-etched.step/1sma4744-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4744.step/1sma4744.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: amsem datasheet (5 pp, sha256
641fed809a9c0149, retrieved 2026-10-21, tier: lcsc) - 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).
# 1SMA4744
**amsem** · Zener Diodes · DO-214AC(SMA)
1SMA4744 from amsem, 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | amsem |
| 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 |
|---|---|---|---|---|---|---|---|
| Forward voltage | VF | | | 1.2 | V | IF = 200 mA (all types) | 2 |
| Maximum Zener impedance (at IZT) | ZZT | | | 14 | Ohms | @ IZT = 17 mA | 2 |
| Maximum Zener impedance (at IZK) | ZZK | | | 700 | Ohms | @ IZK = 0.25 mA | 2 |
| Zener voltage tolerance | | -10 | | 10 | % | Standard tolerance, no suffix A (suffix A = 5%) | 1 |
| Peak power dissipation | PD | | | 1 | W | TA = 50°C (Note 1: mounted on 5.0 mm² land areas) | 1 |
| Peak forward surge current | IFSM | | | 10 | A | 8.3 ms single half sine-wave superimposed on rated load (JEDEC), Note 2 | 1 |
| Operating and storage temperature range | TJ, TSTG | -55 | | 150 | °C | | 1 |
| Nominal Zener voltage | VZ | | 15 | | V | @ IZT = 17 mA (test current) | 2 |
| Reverse leakage current | IR | | 5 | | uA | @ VR = 11.4 V | 2 |
| Surge current (Ir) | Ir | | 304 | | mA | TA = 25°C | 2 |
| Power derating above 50°C | PD | | 6.67 | | mW/°C | derate above TA = 50°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 | Terminals: Pure tin plated lead free, solderable per MIL-STD-750, Method 2025 | 1 |
## CAD (KiCad official)
- Symbol: `1SMA4744`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `1sma4744-etched.step` / `1sma4744-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma4744.step` / `1sma4744.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [amsem datasheet](docs/1sma4744-datasheet.pdf) (5 pp, sha256 `641fed809a9c0149`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/1sma4744-datasheet.pdf)