component
SMB5347A
Public Made by Adomby adom
XCH(旭昌辉) , SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownSMB5347A
XCH(旭昌辉) · IC · SMB
SMB5347A from XCH(旭昌辉), 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 by the color band; it goes positive relative to the anode in zener breakdown (VZ 9.5 to 10.5 V, nominal 10 V for SMB5347A). |
| 2 | A | passive | Anode, the end without the color band; the maximum forward voltage is 1.2 V at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| Package | SMB |
| Category | |
| 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 AVE) | VZ | 9.5 | 10 | 10.5 | V | IZT=2.0 mA | 3 |
| Standard tolerance on nominal zener voltage | -5 | 5 | % | Remark: standard tolerance on nominal zener voltage | 3 | ||
| Maximum zener impedance (ZZT) | ZZT | 125 | Ω | @IZT=2.0 mA | 3 | ||
| Maximum zener impedance at knee (ZZK) | ZZK | 125 | Ω | @IZK=1.00 mA | 3 | ||
| Maximum reverse leakage current (IR) | IR | 5 | uA | @VR=7.6 V | 3 | ||
| Maximum DC zener current (IZM) | IZM | 475 | mA | 3 | |||
| DC power dissipation (PD) | PD | 5 | W | DC, TL = 75 °C, note (1) | 1 | ||
| Maximum forward voltage | VF | 1.2 | V | if=200mA | 1 | ||
| Junction temperature range | TJ，TSTG | -55 | 150 | ℃ | 1 | ||
| Storage temperature range | TJ，TSTG | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance, junction to ambient | RθJA | 65 | ℃/W | note (2): mounted on P.C.B. 0.3" x 0.3" (8.0 mm x 8.0 mm) copper pad areas | 1 |
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 | （2）Thermal resistance from junction to ambient and from junction to lead mounted on P. 0.3" x 0.3" (8.0 mm x 8.0 mm) copper pad areas. | 1 |
CAD (KiCad official)
- Symbol:
SMB5347A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
smb5347a-etched.step/smb5347a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smb5347a.step/smb5347a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XCH(旭昌辉) datasheet (3 pp, sha256
cc44843246128500, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).