component
1SMA4738A
Public Made by Adomby adom
FOSAN Zener Diodes, SMA(DO-214AC). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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1SMA4738A
FOSAN · Zener Diodes · SMA(DO-214AC)
1SMA4738A from FOSAN, in a SMA(DO-214AC). 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 | FOSAN |
| Package | SMA(DO-214AC) |
| 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 (1SMA4738A, nominal 8.2 V family row) | VZ | 7.79 | 8.2 | 8.67 | V | @ IZT, IZT = 31 mA | 2 |
| Forward voltage | VF | 1.5 | V | @ IF=200mA | 1 | ||
| Power dissipation | PD | 500 | mW | Ta=25℃ | 1 | ||
| Power dissipation | PD | 1000 | mW | TL=75℃ | 1 | ||
| Junction and storage temperature range | TJ,Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance junction to lead | RθJL | 50 | ℃/W | 1 | |||
| Thermal resistance junction to ambient | RθJA | 250 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
1SMA4738A - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
1sma4738a-etched.step/1sma4738a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4738a.step/1sma4738a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FOSAN datasheet (4 pp, sha256
f11b8999d6e9fd26, 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).
# 1SMA4738A
**FOSAN** · Zener Diodes · SMA(DO-214AC)
1SMA4738A from FOSAN, in a SMA(DO-214AC). 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 | FOSAN |
| Package | SMA(DO-214AC) |
| 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 (1SMA4738A, nominal 8.2 V family row) | VZ | 7.79 | 8.2 | 8.67 | V | @ IZT, IZT = 31 mA | 2 |
| Forward voltage | VF | | | 1.5 | V | @ IF=200mA | 1 |
| Power dissipation | PD | | | 500 | mW | Ta=25℃ | 1 |
| Power dissipation | PD | | | 1000 | mW | TL=75℃ | 1 |
| Junction and storage temperature range | TJ,Tstg | -55 | | 150 | ℃ | | 1 |
| Thermal resistance junction to lead | RθJL | | | 50 | ℃/W | | 1 |
| Thermal resistance junction to ambient | RθJA | | | 250 | ℃/W | | 1 |
## CAD (KiCad official)
- Symbol: `1SMA4738A`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `1sma4738a-etched.step` / `1sma4738a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma4738a.step` / `1sma4738a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [FOSAN datasheet](docs/1sma4738a-datasheet.pdf) (4 pp, sha256 `f11b8999d6e9fd26`, 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/1sma4738a-datasheet.pdf)