component
MM1Z4B7-HAF
Public Made by Adomby adom
ST(Semtech) Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MM1Z4B7-HAF
ST(Semtech) · Zener Diodes · SOD-123
MM1Z4B7-HAF from ST(Semtech), in a SOD-123. 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 | Cathode | passive | Cathode terminal of the Zener diode, marked by the cathode line ("III") on the package; the datasheet rates the series at 500 mW power dissipation (TL = 75 °C), and MM1Z4B7 has a nominal Zener voltage of 4.7 V. |
| 2 | Anode | passive | Anode terminal of the Zener diode; the series operating junction temperature range is -55 °C to +150 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | SOD-123 |
| Category | Diodes |
| 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 (MM1Z4B7, 4.7 V nominal, Vznom 4.7 V) | VZT | 4.606 | 4.7 | 4.794 | V | at IZT = 5 mA; VZ tested with pulses (20 ms) | 2 |
| Dynamic resistance | ZZT | 130 | Ω | at IZT = 5 mA | 2 | ||
| Reverse current | IR | 2 | µA | at VR = 1 V | 2 | ||
| Forward voltage | VF | 0.9 | V | at IF = 10 mA | 2 | ||
| Zener voltage tolerance | -2 | 2 | % | Zener voltage tolerance ± 2% (suffix B; series feature) | 1 | ||
| Power dissipation | PD | 500 | mW | TL = 75 °C; FR-4 PCB = 89 * 38 mm | 1 | ||
| Operating junction temperature range | Tj | -55 | 150 | °C | 1 | ||
| Storage temperature range | Tstg | -55 | 150 | °C | 1 | ||
| Thermal resistance junction to ambient | RθJA | 340 | /W | Mounted on FR-4 PCB 38 * 38 * 1.6 mm with single-sided Cu pad areas 25 mm2 (>70 µm thick) | 1 | ||
| Thermal resistance junction to lead | RθJL | 150 | /W | FR-4 PCB = 89 * 38 mm | 1 |
CAD (KiCad official)
- Symbol:
MM1Z4B7-HAF - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mm1z4b7-haf-etched.step/mm1z4b7-haf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm1z4b7-haf.step/mm1z4b7-haf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST(Semtech) datasheet (4 pp, sha256
c3d58e6c2df896cb, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).
# MM1Z4B7-HAF
**ST(Semtech)** · Zener Diodes · SOD-123
MM1Z4B7-HAF from ST(Semtech), in a SOD-123. 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 | Cathode | passive | Cathode terminal of the Zener diode, marked by the cathode line ("III") on the package; the datasheet rates the series at 500 mW power dissipation (TL = 75 °C), and MM1Z4B7 has a nominal Zener voltage of 4.7 V. |
| 2 | Anode | passive | Anode terminal of the Zener diode; the series operating junction temperature range is -55 °C to +150 °C. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | SOD-123 |
| Category | Diodes |
| 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 (MM1Z4B7, 4.7 V nominal, Vznom 4.7 V) | VZT | 4.606 | 4.7 | 4.794 | V | at IZT = 5 mA; VZ tested with pulses (20 ms) | 2 |
| Dynamic resistance | ZZT | | | 130 | Ω | at IZT = 5 mA | 2 |
| Reverse current | IR | | | 2 | µA | at VR = 1 V | 2 |
| Forward voltage | VF | | | 0.9 | V | at IF = 10 mA | 2 |
| Zener voltage tolerance | | -2 | | 2 | % | Zener voltage tolerance ± 2% (suffix B; series feature) | 1 |
| Power dissipation | PD | | | 500 | mW | TL = 75 °C; FR-4 PCB = 89 * 38 mm | 1 |
| Operating junction temperature range | Tj | -55 | | 150 | °C | | 1 |
| Storage temperature range | Tstg | -55 | | 150 | °C | | 1 |
| Thermal resistance junction to ambient | RθJA | | | 340 | /W | Mounted on FR-4 PCB 38 * 38 * 1.6 mm with single-sided Cu pad areas 25 mm2 (>70 µm thick) | 1 |
| Thermal resistance junction to lead | RθJL | | | 150 | /W | FR-4 PCB = 89 * 38 mm | 1 |
## CAD (KiCad official)
- Symbol: `MM1Z4B7-HAF`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `mm1z4b7-haf-etched.step` / `mm1z4b7-haf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm1z4b7-haf.step` / `mm1z4b7-haf.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ST(Semtech) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757120042067091456) (4 pp, sha256 `c3d58e6c2df896cb`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/mm1z4b7-haf-datasheet.pdf)