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HZ12B3PF
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ST(Semtech) Zener Diodes, DO-35. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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HZ12B3PF
ST(Semtech) · Zener Diodes · DO-35
HZ12B3PF from ST(Semtech), in a DO-35. 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 cathode band; for HZ12B3PF the zener voltage is 12.9 V min to 13.4 V max at IZT = 5 mA, with reverse leakage of 1 µA max at VR = 9.5 V and dynamic resistance of 35 Ω max. |
| 2 | A | passive | Anode, the end opposite the cathode band; forward voltage is 1 V max at IF = 100 mA and power dissipation is limited to 500 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | DO-35 |
| 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 | VZ | 12.9 | 13.4 | V | at IZT = 5 mA, Ta = 25℃, tested with pulses tp = 20 ms | 4 | |
| Reverse Leakage Current | IR | 1 | µA | at VR = 9.5 V, Ta = 25℃ | 4 | ||
| Dynamic Resistance | ZZT | 35 | Ω | at IZT = 5 mA, Ta = 25℃ | 4 | ||
| Forward Voltage | VF | 1 | V | IF = 100 mA, Ta = 25℃ | 2 | ||
| Power Dissipation | Ptot | 500 | mW | Ta = 25℃ | 1 | ||
| Junction Temperature | Tj | 175 | ℃ | Ta = 25℃ | 1 | ||
| Storage Temperature Range | Tstg | -55 | 175 | ℃ | Ta = 25℃ | 1 | |
| Thermal Resistance Junction to Ambient | RθJA | 300 | ℃/W | Valid provided that electrodes are kept at ambient temperature | 1 | ||
| Zener Test Current | IZT | 5 | mA | test current for VZ and ZZT | 4 |
CAD (KiCad official)
- Symbol:
HZ12B3PF - Footprint:
Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal - 3D model: DO-35 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST(Semtech) datasheet (5 pp, sha256
dea8e423e2307a1e, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).
# HZ12B3PF
**ST(Semtech)** · Zener Diodes · DO-35
HZ12B3PF from ST(Semtech), in a DO-35. 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 cathode band; for HZ12B3PF the zener voltage is 12.9 V min to 13.4 V max at IZT = 5 mA, with reverse leakage of 1 µA max at VR = 9.5 V and dynamic resistance of 35 Ω max. |
| 2 | A | passive | Anode, the end opposite the cathode band; forward voltage is 1 V max at IF = 100 mA and power dissipation is limited to 500 mW. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | DO-35 |
| 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 | VZ | 12.9 | | 13.4 | V | at IZT = 5 mA, Ta = 25℃, tested with pulses tp = 20 ms | 4 |
| Reverse Leakage Current | IR | | | 1 | µA | at VR = 9.5 V, Ta = 25℃ | 4 |
| Dynamic Resistance | ZZT | | | 35 | Ω | at IZT = 5 mA, Ta = 25℃ | 4 |
| Forward Voltage | VF | | | 1 | V | IF = 100 mA, Ta = 25℃ | 2 |
| Power Dissipation | Ptot | | | 500 | mW | Ta = 25℃ | 1 |
| Junction Temperature | Tj | | | 175 | ℃ | Ta = 25℃ | 1 |
| Storage Temperature Range | Tstg | -55 | | 175 | ℃ | Ta = 25℃ | 1 |
| Thermal Resistance Junction to Ambient | RθJA | | | 300 | ℃/W | Valid provided that electrodes are kept at ambient temperature | 1 |
| Zener Test Current | IZT | | 5 | | mA | test current for VZ and ZZT | 4 |
## CAD (KiCad official)
- Symbol: `HZ12B3PF`
- Footprint: `Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal`
- 3D model: DO-35 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ST(Semtech) datasheet](docs/hz12b3pf-datasheet.pdf) (5 pp, sha256 `dea8e423e2307a1e`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/hz12b3pf-datasheet.pdf)