component
1SMA5918A
Public Made by Adomby adom
hongjiacheng Zener Diodes, DO-214AC(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
markdown1SMA5918A
hongjiacheng · Zener Diodes · DO-214AC(SMA)
1SMA5918A from hongjiacheng, in a DO-214AC(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, the end marked with the cathode line; zener voltage VZ is 4.84 V min to 5.36 V max (5.1 V nominal) at IZT=73.5 mA for 1SMA5918A. |
| 2 | A | passive | Anode, the end opposite the cathode line; forward voltage VF is 1.5 V at IF=200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| Package | DO-214AC(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 |
|---|---|---|---|---|---|---|---|
| Reverse zener voltage | VZ | 4.84 | 5.1 | 5.36 | V | @ IZT 73.5 mA (1SMA5918A row) | 2 |
| Maximum Zener impedance | ZZT | 4 | Ω | @ IZT 73.5 mA | 2 | ||
| Maximum Zener impedance | ZZK | 350 | Ω | @ IZK 1.0 mA | 2 | ||
| Zener voltage tolerance (standard) | -5 | 5 | % | Standard tolerance on nominal zener voltage, per note (1) | 2 | ||
| Power dissipation | PD | 1500 | mW | at Tc=75℃ | 1 | ||
| Forward voltage | VF | 1.5 | V | @ IF=200mA | 1 | ||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 | ||
| Junction temperature | Tj | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance, junction to ambient | RθJ-A | 250 | ℃ /W | 1 |
CAD (KiCad official)
- Symbol:
1SMA5918A - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
1sma5918a-etched.step/1sma5918a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma5918a.step/1sma5918a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (4 pp, sha256
1e55beed7cd7d4fa, 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).