component
1SMB5942B
Public Made by Adomby adom
PAKER Zener Diodes, SMB. 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
markdown1SMB5942B
PAKER · Zener Diodes · SMB
1SMB5942B from PAKER, in a SMB. 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 color band; the zener is reverse-biased with this pin positive, with a nominal Vz of 51 V (48.45 V min to 53.55 V max) at IZT = 7.3 mA. |
| 2 | A | passive | Anode, the end opposite the color band; the datasheet gives a 3.0 W DC power dissipation rating at TL = 75°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | PAKER |
| Package | SMB |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Zener Voltage | VZ | 48.45 | 51 | 53.55 | V | IZT = 7.3 mA | 2 |
| Zener Voltage Tolerance (suffix B) | -5 | 5 | % | Suffix B indicates ±5.0% tolerance | 2 | ||
| Zener Impedance | ZZT | 70 | Ω | @ IZT = 7.3 mA | 2 | ||
| Knee Zener Impedance | ZZK | 1100 | Ω | @ IZK = 0.25 mA | 2 | ||
| Leakage Current | IR | 1 | μA | @ VR = 38.8 V | 2 | ||
| Maximum DC Zener Current | IZM | 29 | mA | DC | 2 | ||
| DC Power Dissipation | PD | 3 | W | TL=75°C, zero lead length, Cu-pad 5mm x 5mm | 1 | ||
| Junction Temperature Range | TJ | -55 | 150 | °C | 1 | ||
| Storage Temperature Range | TSTG | -55 | 150 | °C | 1 | ||
| Zener Test Current | IZT | 7.3 | mA | Test current for VZ and ZZT | 2 | ||
| Knee Test Current | IZK | 0.25 | mA | Test current for ZZK | 2 |
CAD (KiCad official)
- Symbol:
1SMB5942B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
1smb5942b-etched.step/1smb5942b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5942b.step/1smb5942b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: PAKER datasheet (3 pp, sha256
f6f70e24fef94239, 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).