component
SMBJ5348B
Public Made by Adomby adom
Slkor(SLKORMICRO Elec.) 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
markdownSMBJ5348B
Slkor(SLKORMICRO Elec.) · Zener Diodes · SMB
SMBJ5348B from Slkor(SLKORMICRO Elec.), 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 on the package; the 5 W zener (SMBJ5348B, VZ 11 V at IZT 125 mA) is reverse biased with this pin positive. |
| 2 | A | passive | Anode, the unmarked end of the package; forward voltage is 1.2 V max at IF=1.0 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Slkor(SLKORMICRO Elec.) |
| 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 tolerance (B suffix) | VZ | -5 | 5 | % | suffix B selected type, @IZT | 3 | |
| Maximum zener impedance | ZZT | 2.5 | Ω | @IZT | 2 | ||
| Maximum zener impedance (knee) | ZZK | 125 | Ω | @IZK = 1 mA | 2 | ||
| Maximum reverse leakage current | IR | 5 | μA | @VR = 8 V | 2 | ||
| Maximum DC zener current | IZM | 430 | mA | @50℃ | 2 | ||
| Forward voltage | VF | 1.2 | V | IF=1.0A | 1 | ||
| Power dissipation | Pt | 5 | W | TL=75℃ | 1 | ||
| Thermal resistance, junction to ambient | Rθ(ja) | 20 | ℃/W | mounted on 5×5mm copper pad at lead ends | 1 | ||
| Operating and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Nominal zener voltage | VZ | 11 | V | @IZT | 2 | ||
| Zener test current | IZT | 125 | mA | 2 |
CAD (KiCad official)
- Symbol:
SMBJ5348B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
smbj5348b-etched.step/smbj5348b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj5348b.step/smbj5348b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Slkor(SLKORMICRO Elec.) datasheet (5 pp, sha256
42869e8f1e6e687c, retrieved 2026-10-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).