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1SMA4749A
Public Made by Adomby adom
MDD Microdiode Semiconductor Zener Diodes, SMA(DO-214AC). 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
markdown1SMA4749A
MDD Microdiode Semiconductor · Zener Diodes · SMA(DO-214AC)
1SMA4749A from MDD Microdiode Semiconductor, 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 terminal, marked by the polarity band on the body, which goes positive in Zener (reverse) breakdown regulation; the datasheet gives power dissipation of 1.0 W at TA=50°C and a 1.2 V forward voltage. |
| 2 | A | passive | Anode terminal, the end without the polarity band; the datasheet gives a peak forward surge current of 10.0 A (8.3 ms half sine-wave) and an operating and storage range of -55 to +150 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| Package | SMA(DO-214AC) |
| Category | Diodes |
| Pins | 2 |
CAD (KiCad official)
- Symbol:
1SMA4749A - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
1sma4749a-etched.step/1sma4749a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4749a.step/1sma4749a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MDD Microdiode Semiconductor datasheet (5 pp, sha256
b0a657aa72d39a2a, retrieved 2026-10-12, 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).