component
1SMA4756A
Public Made by Adomby adom
TWGMC 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
markdown1SMA4756A
TWGMC · Zener Diodes · SMA(DO-214AC)
1SMA4756A from TWGMC, 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 | Cathode | passive | Cathode of the unipolar zener diode, which is the positive-biased side in zener (reverse) breakdown regulation; power dissipation is max. 1 W at Tc=75°C. |
| 2 | Anode | passive | Anode of the unipolar zener diode; forward voltage is max. 1.2 V at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| 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 | VZT | 44.9 | 47 | 49.8 | V | at IZT = 5.5 mA, pulsed (20 ms) | 3 |
| Test Current | IZT | 5.5 | mA | 3 | |||
| Dynamic Impedance | ZZT | 80 | Ω | at IZT | 3 | ||
| Reverse Current | IR | 1 | µA | at VR = 35 V | 3 | ||
| 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:
1SMA4756A - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
1sma4756a-etched.step/1sma4756a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4756a.step/1sma4756a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TWGMC datasheet (4 pp, sha256
a0e1e0c1e7da0b66, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).