component
1SMA4743A SMA
Public Made by Adomby adom
XCH(旭昌辉) , SMA. 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
markdown1SMA4743A SMA
XCH(旭昌辉) · IC · SMA
1SMA4743A SMA from XCH(旭昌辉), in a 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 (zener) terminal at the marked-band end of the SMA body, which goes positive in zener reverse breakdown; the 1SMA4743A has VZT of 13 V nominal (12.4 V to 14.1 V) at IZT = 19 mA. |
| 2 | A | passive | Anode terminal at the unbanded end of the 2-lead SMA package; total power dissipation is max. 1 W at Tc = 75 °C and forward voltage is 1.2 V at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| Package | SMA |
| Category | |
| 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 (1SMA4743A, 13 V nominal) | VZT | 12.4 | 13 | 14.1 | V | At IZT = 19 mA; VZT tested with pulses (20 ms) | 2 |
| Dynamic impedance | ZZT | 10 | Ω | At IZT = 19 mA | 2 | ||
| Reverse current | IR | 5 | µA | 2 | |||
| Admissible Zener current | IZM | 71 | mA | 2 | |||
| Power dissipation | PD | 1 | W | At Tc = 75°C | 1 | ||
| Junction temperature range | TJ | -55 | 150 | °C | 1 | ||
| Storage temperature range | TS | -55 | 150 | °C | 1 | ||
| Forward voltage | VF | 1.2 | V | At IF = 200 mA | 1 |
CAD (KiCad official)
- Symbol:
1SMA4743A SMA - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
1sma4743a-sma-etched.step/1sma4743a-sma-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4743a-sma.step/1sma4743a-sma.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XCH(旭昌辉) datasheet (3 pp, sha256
8898909dec2ee3ad, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).