component
SMBJ5343B
Public Made by Adomby adom
LGE Zener Diodes, SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SMBJ5343B
LGE · Zener Diodes · SMB
SMBJ5343B from LGE, 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, marked by the color band; regulator voltage VZ is 7.5 V at IZT = 175 mA for SMBJ5343B with 5 W power dissipation at TL = 25 °C. |
| 2 | A | passive | Anode end of the zener diode, with maximum forward voltage of 1.2 V at IF = 1.0 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| 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 |
|---|---|---|---|---|---|---|---|
| Regulator Voltage tolerance | VZ | -5 | 5 | % | Suffix B | 2 | |
| Regulator Voltage | VZ | 7.5 | V | IZT = 175 mA | 2 | ||
| Maximum Dynamic Impedance | ZZ | 1.5 | OHMS | A&B Suffix | 2 | ||
| Maximum Reverse Current | IR | 10 | μA | @ VR = 5.7 V (B suffix) | 2 | ||
| Maximum Regulator Current | IZM | 630 | mA | B suffix | 2 | ||
| Maximum Dynamic Knee Impedance | Zzk | 200 | OHMS | @ 1.0 mA | 2 | ||
| Maximum Surge Current | IZSM | 10.7 | AMPS | Non-recurrent half-sine wave, 8.3 ms | 2 | ||
| Maximum Voltage Regulation | ΔVZ | 0.15 | VOLTS | Difference between voltage at 10% and 50% of IZM | 2 | ||
| Test Current | IZT | 175 | mA | 2 | |||
| Power Dissipation | PD | 5 | W | TL = 25 °C | 1 | ||
| Maximum Forward Voltage | VF | 1.2 | V | IF = 1.0 A | 1 | ||
| Thermal Resistance, Junction to Ambient | RӨJA | 90 | °C/W | Mounted on FR4 PC board (1 oz Cu) with recommended footprint | 1 | ||
| Thermal Resistance, Junction to Lead | RӨJL | 25 | °C/W | Mounted on FR4 PC board (1 oz Cu) with recommended footprint | 1 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
SMBJ5343B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
smbj5343b-etched.step/smbj5343b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj5343b.step/smbj5343b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LGE datasheet (3 pp, sha256
9441d4af3ecff01f, 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).
# SMBJ5343B
**LGE** · Zener Diodes · SMB
SMBJ5343B from LGE, 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, marked by the color band; regulator voltage VZ is 7.5 V at IZT = 175 mA for SMBJ5343B with 5 W power dissipation at TL = 25 °C. |
| 2 | A | passive | Anode end of the zener diode, with maximum forward voltage of 1.2 V at IF = 1.0 A. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| 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 |
|---|---|---|---|---|---|---|---|
| Regulator Voltage tolerance | VZ | -5 | | 5 | % | Suffix B | 2 |
| Regulator Voltage | VZ | | 7.5 | | V | IZT = 175 mA | 2 |
| Maximum Dynamic Impedance | ZZ | | | 1.5 | OHMS | A&B Suffix | 2 |
| Maximum Reverse Current | IR | | | 10 | μA | @ VR = 5.7 V (B suffix) | 2 |
| Maximum Regulator Current | IZM | | | 630 | mA | B suffix | 2 |
| Maximum Dynamic Knee Impedance | Zzk | | | 200 | OHMS | @ 1.0 mA | 2 |
| Maximum Surge Current | IZSM | | | 10.7 | AMPS | Non-recurrent half-sine wave, 8.3 ms | 2 |
| Maximum Voltage Regulation | ΔVZ | | | 0.15 | VOLTS | Difference between voltage at 10% and 50% of IZM | 2 |
| Test Current | IZT | | 175 | | mA | | 2 |
| Power Dissipation | PD | | | 5 | W | TL = 25 °C | 1 |
| Maximum Forward Voltage | VF | | | 1.2 | V | IF = 1.0 A | 1 |
| Thermal Resistance, Junction to Ambient | RӨJA | | | 90 | °C/W | Mounted on FR4 PC board (1 oz Cu) with recommended footprint | 1 |
| Thermal Resistance, Junction to Lead | RӨJL | | | 25 | °C/W | Mounted on FR4 PC board (1 oz Cu) with recommended footprint | 1 |
| Operating and Storage Temperature Range | TJ, TSTG | -65 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `SMBJ5343B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `smbj5343b-etched.step` / `smbj5343b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj5343b.step` / `smbj5343b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [LGE datasheet](docs/smbj5343b-datasheet.pdf) (3 pp, sha256 `9441d4af3ecff01f`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/smbj5343b-datasheet.pdf)