component
1SMA5918BT3G
Public Made by Adomby adom
onsemi Zener Diodes, SMA. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 2d ago |
| viewers | 2d ago |
| 1sma5918bt3g-etched.glb | 2d ago |
| 1sma5918bt3g-etched.step | 2d ago |
| 1sma5918bt3g-hero.glb | 2d ago |
| 1sma5918bt3g-hero.overlay.json | 2d ago |
| 1sma5918bt3g.glb | 2d ago |
| 1sma5918bt3g.kicad_mod | 2d ago |
| 1sma5918bt3g.kicad_sym | 2d ago |
| 1sma5918bt3g.lbr | 2d ago |
| 1sma5918bt3g.step | 2d ago |
| package.json | 2d ago |
| page.json | 2d ago |
| README.md | 2d ago |
1SMA5918BT3G
onsemi · Zener Diodes · SMA
1SMA5918BT3G from onsemi, 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 | Pin 1 is the cathode, marked by the polarity band on the SMA package per Style 1; the datasheet states the cathode is indicated by a molded polarity notch or cathode band. |
| 2 | ANODE | passive | Pin 2 is the anode of the Zener diode under SMA Style 1, opposite the cathode polarity band. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage @ IZT | VZ | 4.84 | 5.1 | 5.36 | Volts | @ IZT = 73.5 mA; TA = 25°C; limits guaranteed at thermal equilibrium (Note 4) | 2 |
| Maximum Zener Impedance @ IZT | ZZT | 4 | ohm | @ IZT = 73.5 mA | 2 | ||
| Maximum Zener Impedance @ IZK | ZZK | 350 | ohm | @ IZK = 1.0 mA | 2 | ||
| Forward Voltage | VF | 1.2 | V | @ IF = 200 mA; for all types | 2 | ||
| Maximum DC Zener Current | IZM | 294 | mA(dc) | 2 | |||
| DC Power Dissipation @ TL = 75°C, measured zero lead length (Note 1) | PD | 1.5 | W | TL = 75°C; 1 in square copper pad, FR-4 board | 1 | ||
| DC Power Dissipation @ TA = 25°C (Note 2) | PD | 0.5 | W | TA = 25°C; FR-4 board, onsemi minimum recommended footprint | 1 | ||
| Operating and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Thermal Resistance, Junction-to-Lead | RJL | 50 | °C/W | Measured zero lead length (Note 1) | 1 | ||
| Thermal Resistance, Junction-to-Ambient | RJA | 250 | °C/W | FR-4 board, onsemi minimum recommended footprint (Note 2) | 1 | ||
| Reverse Leakage Current @ VR | IR | 2.5 | A | @ VR = 1.0 V | 2 |
CAD (KiCad official)
- Symbol:
1SMA5918BT3G - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
1sma5918bt3g-etched.step/1sma5918bt3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma5918bt3g.step/1sma5918bt3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
f462474d29a69587, retrieved 2026-10-21, tier: manufacturer) - 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).