component
SMB3Z47A
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XCH(旭昌辉) , SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SMB3Z47A
XCH(旭昌辉) · IC · SMB
SMB3Z47A 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 (reverse) operation, and the SMB3Z47A has a nominal VZ of 47 V (44.65 to 49.35 V). |
| 2 | A | passive | Anode, the end opposite 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (min / nominal / max) | VZ | 44.65 | 47 | 49.35 | V | Nominal Zener voltage @ IZT = 16.0 mA | 3 |
| Maximum Zener impedance | ZZT | 38 | Ω | @ IZT = 16.0 mA | 3 | ||
| Maximum Zener impedance (knee) | ZZK | 1500 | Ω | @ IZK = 0.25 mA | 3 | ||
| Maximum reverse leakage current | IR | 0.5 | uA | @ VR = 35.6 V | 3 | ||
| Maximum DC Zener current | IZM | 57 | mA | 3 | |||
| Maximum forward voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| DC power dissipation | PD | 3 | W | TL = 75 °C (lead temperature at 3/8 in (9.5 mm) from body) | 1 | ||
| Storage temperature range | TJ, TSTG | -55 | 150 | °C | 1 | ||
| Junction temperature range | TJ, TSTG | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
SMB3Z47A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
smb3z47a-etched.step/smb3z47a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smb3z47a.step/smb3z47a.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).
# SMB3Z47A
**XCH(旭昌辉)** · IC · SMB
SMB3Z47A 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 (reverse) operation, and the SMB3Z47A has a nominal VZ of 47 V (44.65 to 49.35 V). |
| 2 | A | passive | Anode, the end opposite 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (min / nominal / max) | VZ | 44.65 | 47 | 49.35 | V | Nominal Zener voltage @ IZT = 16.0 mA | 3 |
| Maximum Zener impedance | ZZT | | | 38 | Ω | @ IZT = 16.0 mA | 3 |
| Maximum Zener impedance (knee) | ZZK | | | 1500 | Ω | @ IZK = 0.25 mA | 3 |
| Maximum reverse leakage current | IR | | | 0.5 | uA | @ VR = 35.6 V | 3 |
| Maximum DC Zener current | IZM | | | 57 | mA | | 3 |
| Maximum forward voltage | VF | | | 1.2 | V | IF = 200 mA | 1 |
| DC power dissipation | PD | | | 3 | W | TL = 75 °C (lead temperature at 3/8 in (9.5 mm) from body) | 1 |
| Storage temperature range | TJ, TSTG | -55 | | 150 | °C | | 1 |
| Junction temperature range | TJ, TSTG | -55 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `SMB3Z47A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `smb3z47a-etched.step` / `smb3z47a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smb3z47a.step` / `smb3z47a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [XCH(旭昌辉) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603062422433378304) (3 pp, sha256 `f7084c044e53fbe6`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).
[Datasheet PDF](docs/smb3z47a-datasheet.pdf)