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1SMA5954B
Public Made by Adomby adom
EIC Semicon 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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Contents
README
markdown1SMA5954B
EIC Semicon · Zener Diodes · DO-214AC(SMA)
1SMA5954B from EIC Semicon, 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, marked by the color band on the package; Zener voltage 160 V nominal at IZT = 2.3 mA for the 1SMA5954B. |
| 2 | A | passive | Anode; the datasheet gives no pin numbers, only that the color band denotes the cathode end. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | EIC Semicon |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage (nominal) | VZ | 160 | V | @ IZT = 2.3 mA | 2 | ||
| Zener Voltage Tolerance (suffix B) | VZ | -5 | 5 | % | Suffix B indicates ±5% tolerance | 2 | |
| Zener Test Current | IZT | 2.3 | mA | 2 | |||
| Maximum Zener Impedance | ZZT | 700 | W | @ IZT | 2 | ||
| Maximum Zener Impedance (knee) | ZZK | 6500 | W | @ IZK = 0.25 mA | 2 | ||
| Maximum Reverse Leakage Current | IR | 1 | mA | @ VR = 121.6 V | 2 | ||
| Maximum DC Zener Current | IZM | 9 | mA | 2 | |||
| Maximum Surge Current | IZSM | 0.089 | A | Non-recurrent half-sine wave, 8.3 ms | 2 | ||
| DC Power Dissipation | PD | 1.5 | W | @ TL = 75 °C, zero lead length, 1" square copper pad, FR-4 board | 1 | ||
| DC Power Dissipation | PD | 0.5 | W | @ Ta = 25 °C (FR-4 board) | 1 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -65 | 150 | °C | 1 | ||
| Thermal Resistance Junction to Lead | RӨJL | 50 | °C/W | 1 | |||
| Thermal Resistance Junction to Ambient | RӨJA | 250 | °C/W | 1 | |||
| Derate above 75 °C | 20 | mW/°C | Derate above 75 °C (TL) | 1 | |||
| Derate above 25 °C | 4 | mW/°C | Derate above 25 °C (FR-4 board) | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | Measured zero lead length(1" square copper pad, FR-4 board) 20 | 1 |
CAD (KiCad official)
- Symbol:
1SMA5954B - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
1sma5954b-etched.step/1sma5954b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma5954b.step/1sma5954b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: EIC Semicon datasheet (3 pp, sha256
f0a01765e7ea17af, retrieved 2026-10-23, 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).