component
SMB5350A
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
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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
markdownSMB5350A
XCH(旭昌辉) · IC · SMB
SMB5350A 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 end, marked by the color band; the Zener (13 V nominal, 12.35 to 13.65 V) voltage is positive at this terminal in reverse breakdown. |
| 2 | A | passive | Anode terminal, the end opposite the color band; the maximum forward voltage is 1.2 V at 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (nominal VZ AVE 13.0 V, min 12.35 V, max 13.65 V) | VZ | 12.35 | 13 | 13.65 | V | @IZT | 3 |
| Zener voltage tolerance (A suffix) | -5 | 5 | % | Standard tolerance on nominal zener voltage, per table remark | 3 | ||
| Maximum zener impedance | ZZT | 100 | Ω | @IZT | 3 | ||
| Maximum zener impedance at IZK | ZZK | 100 | Ω | @IZK | 3 | ||
| Maximum reverse leakage current | IR | 1 | uA | @VR = 9.9 V | 3 | ||
| Maximum DC zener current | IZM | 365 | mA | 3 | |||
| Maximum forward voltage | VF | 1.2 | V | if=200mA | 1 | ||
| DC power dissipation | PD | 5 | W | TL = 75 °C | 1 | ||
| Junction temperature range | TJ | -55 | 150 | ℃ | 1 | ||
| Storage temperature range | TSTG | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance, junction to ambient | RθJA | 65 | ℃/W | Junction to ambient, mounted on 8.0 mm x 8.0 mm copper pad areas (note 2) | 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:
SMB5350A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
smb5350a-etched.step/smb5350a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smb5350a.step/smb5350a.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).