component
1SMA4742
Public Made by Adomby adom
SMC(Sangdest Microelectronicstronic (Nanjing)) 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.
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
markdown1SMA4742
SMC(Sangdest Microelectronicstronic (Nanjing)) · Zener Diodes · SMA(DO-214AC)
1SMA4742 from SMC(Sangdest Microelectronicstronic (Nanjing)), 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 | SMC(Sangdest Microelectronicstronic (Nanjing)) |
| 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 |
|---|---|---|---|---|---|---|---|
| Power Dissipation | PD | 1 | W | TA=25°C, Note 1 (terminals kept at ambient temperature) | 1 | ||
| Power Derating Above 25°C | 8 | mW/°C | Derate above 25°C | 1 | |||
| Forward Voltage | VF | 1.2 | V | IF = 200mA | 1 | ||
| Typical Thermal Resistance Junction to Ambient | RθJA | 120 | °C/W | Note 1 | 1 | ||
| Operating Junction and Storage Temperature Range | TJ,TSTG | -65 | 150 | °C | 1 | ||
| Standard Vz Tolerance | Vz | -5 | 5 | % | Features list: 5% Standard Vz Tolerance | 1 |
CAD (KiCad official)
- Symbol:
1SMA4742 - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
1sma4742-etched.step/1sma4742-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4742.step/1sma4742.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SMC(Sangdest Microelectronicstronic (Nanjing)) datasheet (4 pp, sha256
dd8c5d3bdc9ab3e4, retrieved 2026-10-22, 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).