component
SMB3Z190A
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.
README
markdownSMB3Z190A
XCH(旭昌辉) · IC · SMB
SMB3Z190A 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, marked by the color band on the DO-214AA body; it goes positive of the anode in Zener (reverse) operation, with VZ 190 V nominal (180.5 to 199.5 V) at IZT 4.0 mA. |
| 2 | A | passive | Anode, the end opposite the color band; forward voltage is at most 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, min, max) | VZ | 180.5 | 190 | 199.5 | V | 3 | |
| Maximum Zener impedance | ZZT | 800 | Ω | @IZT 4.0 mA | 3 | ||
| Maximum Zener impedance (knee) | ZZK | 8000 | Ω | @IZK 0.25 mA | 3 | ||
| Maximum reverse leakage current | IR | 0.5 | uA | @VR 144.8 V | 3 | ||
| Maximum DC Zener current | IZM | 14 | mA | 3 | |||
| Maximum forward voltage | VF | 1.2 | V | IF=200mA | 1 | ||
| DC power dissipation | PD | 3 | W | TL = 75 °C (note 1) | 1 | ||
| Storage temperature range | TSTG | -55 | 150 | ℃ | 1 | ||
| Junction temperature range | TJ | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
SMB3Z190A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
smb3z190a-etched.step/smb3z190a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smb3z190a.step/smb3z190a.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
f7084c044e53fbe6, 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).