component
1SMA4748A
Public Made by Adomby adom
Shandong Jingdao Microelectronics Zener Diodes, 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
markdown1SMA4748A
Shandong Jingdao Microelectronics · Zener Diodes · SMA
1SMA4748A from Shandong Jingdao Microelectronics, 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 | Cathode | passive | Cathode terminal of the 1SMA4748A zener diode; the datasheet gives no separate electrical limit for this pin beyond the series ratings of 1 W total power dissipation and 3.3 V to 330 V zener voltage range. |
| 2 | Anode | passive | Anode terminal of the 1SMA4748A zener diode; the datasheet gives no separate electrical limit for this pin beyond the series ratings of 1 W total power dissipation and 3.3 V to 330 V zener voltage range. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| Package | 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 | VZT | 20.8 | 22 | 23.3 | V | at IZT = 12 mA; tested with pulses (20 ms) | 2 |
| Dynamic impedance | ZZT | 25 | Ω | at IZT = 12 mA | 2 | ||
| Reverse current | IR | 5 | µA | at VR = 18 V | 2 | ||
| Power dissipation | PD | 1 | W | at Tc = 75 °C | 1 | ||
| Forward voltage | VF | 1.2 | V | at IF = 200 mA | 1 | ||
| Junction temperature range | TJ | -55 | 150 | °C | 1 | ||
| Storage temperature range | TS | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
1SMA4748A - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
1sma4748a-etched.step/1sma4748a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4748a.step/1sma4748a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shandong Jingdao Microelectronics datasheet (3 pp, sha256
296be0e2be372196, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).