component
MMBZ5246B
Public Made by Adomby adom
Changjing Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MMBZ5246B
Changjing · Zener Diodes · SOT-23
MMBZ5246B from Changjing, in a SOT-23. 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 | A | passive | Zener anode, the side of the diode symbol drawn with the triangle on the SOT-23 pin diagram; the MMBZ5246B has a nominal VZ of 16 V at IZT = 7.8 mA. |
| 2 | NC | unconnected | Not connected; the SOT-23 pin diagram shows pin 2 as an open terminal with no connection to the diode. |
| 3 | K | passive | Zener cathode, the bar side of the diode symbol; it is positive relative to the anode in reverse (zener) operation, and the part is rated for 300 mW power dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |
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 | VZ | 15.2 | 16 | 16.8 | V | Nominal 16 V (KJ1 row); IZT = 7.8 mA; short pulse test (note 1) | 2 |
| Maximum Zener impedance | ZZT | 17 | Ω | @ IZT = 7.8 mA; f = 1kHz (note 2) | 2 | ||
| Maximum Zener impedance | ZZK | 600 | Ω | @ IZK = 0.25 mA; f = 1kHz (note 2) | 2 | ||
| Maximum reverse leakage current | IR | 0.1 | µA | @ VR = 12 V | 2 | ||
| Power dissipation | PD | 300 | mW | Ta = 25℃ unless otherwise specified | 1 | ||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature range | TSTG | -55 | 150 | ℃ | 1 | ||
| Forward voltage | VF | 0.9 | V | @ IF = 10 mA | 1 | ||
| Thermal resistance, junction to ambient | R JA | 417 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
MMBZ5246B - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbz5246b-etched.step/mmbz5246b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz5246b.step/mmbz5246b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
aaf766a75da5fd05, retrieved 2026-10-18, 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).
# MMBZ5246B
**Changjing** · Zener Diodes · SOT-23
MMBZ5246B from Changjing, in a SOT-23. 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 | A | passive | Zener anode, the side of the diode symbol drawn with the triangle on the SOT-23 pin diagram; the MMBZ5246B has a nominal VZ of 16 V at IZT = 7.8 mA. |
| 2 | NC | unconnected | Not connected; the SOT-23 pin diagram shows pin 2 as an open terminal with no connection to the diode. |
| 3 | K | passive | Zener cathode, the bar side of the diode symbol; it is positive relative to the anode in reverse (zener) operation, and the part is rated for 300 mW power dissipation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |
## 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 | VZ | 15.2 | 16 | 16.8 | V | Nominal 16 V (KJ1 row); IZT = 7.8 mA; short pulse test (note 1) | 2 |
| Maximum Zener impedance | ZZT | | | 17 | Ω | @ IZT = 7.8 mA; f = 1kHz (note 2) | 2 |
| Maximum Zener impedance | ZZK | | | 600 | Ω | @ IZK = 0.25 mA; f = 1kHz (note 2) | 2 |
| Maximum reverse leakage current | IR | | | 0.1 | µA | @ VR = 12 V | 2 |
| Power dissipation | PD | | | 300 | mW | Ta = 25℃ unless otherwise specified | 1 |
| Junction temperature | Tj | | | 150 | ℃ | | 1 |
| Storage temperature range | TSTG | -55 | | 150 | ℃ | | 1 |
| Forward voltage | VF | | 0.9 | | V | @ IF = 10 mA | 1 |
| Thermal resistance, junction to ambient | R JA | | 417 | | ℃/W | | 1 |
## CAD (KiCad official)
- Symbol: `MMBZ5246B`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbz5246b-etched.step` / `mmbz5246b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbz5246b.step` / `mmbz5246b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590224155338973184) (5 pp, sha256 `aaf766a75da5fd05`, retrieved 2026-10-18, 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/mmbz5246b-datasheet.pdf)