component
1SMB5929B
Public Made by Adomby adom
MDD（Microdiode Electronics） 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.
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1SMB5929B
MDD（Microdiode Electronics） · Zener Diodes · SMB
1SMB5929B from MDD（Microdiode Electronics）, 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 | MDD（Microdiode Electronics） |
| 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 | 14.25 | 15 | 15.75 | V | @ IZT = 25 mA | 2 |
| Zener test current | IZT | 25 | mA | 2 | |||
| Maximum zener impedance | ZZT | 9 | Ω | @ IZT = 25 mA | 2 | ||
| Maximum zener impedance (knee) | ZZK | 600 | Ω | @ IZK = 0.25 mA | 2 | ||
| Reverse leakage current | IR | 1 | μA | @ VR = 11.4 V | 2 | ||
| Maximum DC zener current | IZM | 100 | mA | 2 | |||
| Forward voltage | VF | 1.5 | V | IF = 200 mA(DC), all types | 1 | ||
| Zener voltage tolerance | -5 | 5 | % | Suffix B | 2 | ||
| DC power dissipation | PD | 3 | W | TL=75°C, zero lead length, Cu-pad 5mm x 5mm on PCB | 1 | ||
| Steady state power dissipation | PD | 550 | mW | @ TA=25°C | 1 | ||
| Junction temperature range | TJ | -55 | 150 | °C | 1 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 1 | ||
| Junction to ambient thermal resistance | RthJA | 226 | °C/W | 1 | |||
| Junction to lead thermal resistance | RthJL | 25 | °C/W | 1 |
CAD (KiCad official)
- Symbol:
1SMB5929B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
1smb5929b-etched.step/1smb5929b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5929b.step/1smb5929b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MDD（Microdiode Electronics） datasheet (3 pp, sha256
22608e2c129adb2f, retrieved 2026-10-22, tier: lcsc) - 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).
# 1SMB5929B
**MDD（Microdiode Electronics）** · Zener Diodes · SMB
1SMB5929B from MDD（Microdiode Electronics）, 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 | MDD（Microdiode Electronics） |
| 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 | 14.25 | 15 | 15.75 | V | @ IZT = 25 mA | 2 |
| Zener test current | IZT | | 25 | | mA | | 2 |
| Maximum zener impedance | ZZT | | | 9 | Ω | @ IZT = 25 mA | 2 |
| Maximum zener impedance (knee) | ZZK | | | 600 | Ω | @ IZK = 0.25 mA | 2 |
| Reverse leakage current | IR | | | 1 | μA | @ VR = 11.4 V | 2 |
| Maximum DC zener current | IZM | | | 100 | mA | | 2 |
| Forward voltage | VF | | | 1.5 | V | IF = 200 mA(DC), all types | 1 |
| Zener voltage tolerance | | -5 | | 5 | % | Suffix B | 2 |
| DC power dissipation | PD | | | 3 | W | TL=75°C, zero lead length, Cu-pad 5mm x 5mm on PCB | 1 |
| Steady state power dissipation | PD | | | 550 | mW | @ TA=25°C | 1 |
| Junction temperature range | TJ | -55 | | 150 | °C | | 1 |
| Storage temperature range | TSTG | -55 | | 150 | °C | | 1 |
| Junction to ambient thermal resistance | RthJA | | | 226 | °C/W | | 1 |
| Junction to lead thermal resistance | RthJL | | | 25 | °C/W | | 1 |
## CAD (KiCad official)
- Symbol: `1SMB5929B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `1smb5929b-etched.step` / `1smb5929b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1smb5929b.step` / `1smb5929b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [MDD（Microdiode Electronics） datasheet](docs/1smb5929b-datasheet.pdf) (3 pp, sha256 `22608e2c129adb2f`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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).
[Datasheet PDF](docs/1smb5929b-datasheet.pdf)