component
1SMB5939B-13
Public Made by Adomby adom
Diodes Incorporated Zener Diodes, SMB. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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
markdown1SMB5939B-13
Diodes Incorporated · Zener Diodes · SMB
1SMB5939B-13 from Diodes Incorporated, 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage | VZ | 37.05 | 39 | 40.95 | V | @ IZT = 9.6 mA, TA=+25°C | 3 |
| Test Current | IZT | 9.6 | mA | TA=+25°C | 3 | ||
| Maximum Zener Impedance | ZZT | 45 | Ω | @ IZT | 3 | ||
| Maximum Zener Impedance | ZZK | 900 | Ω | @ IZK = 0.25 mA | 3 | ||
| Maximum Reverse Current | IR | 1 | µA | @ VR = 29.7 V | 3 | ||
| Maximum Zener Current | IZM | 38 | mA | 3 | |||
| Forward Voltage | VF | 1.5 | V | @ IF = 200mA, TA=+25°C | 2 | ||
| Power Dissipation | PD | 3 | W | @TL = +75°C, derate 40 mW/°C above +75°C | 2 | ||
| Power Dissipation | PD | 550 | mW | @TA = +25°C, derate 4.4 mW/°C above +25°C | 2 | ||
| Thermal Resistance Junction to Terminal | RθJT | 25 | °C/W | Note 5 | 2 | ||
| Thermal Resistance Junction to Ambient | RθJA | 226 | °C/W | Note 5 | 2 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 150 | °C | 2 |
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 Alloy | tin | • Copper Alloy Leadframe with Lead-Free Plating (Matte Tin | 1 |
CAD (KiCad official)
- Symbol:
1SMB5939B-13 - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
1smb5939b-13-etched.step/1smb5939b-13-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5939b-13.step/1smb5939b-13.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (7 pp, sha256
c06473e556bd519c, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).