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BZX2C12PF
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ST(Semtech) Zener Diodes, DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BZX2C12PF
ST(Semtech) · Zener Diodes · DO-41
BZX2C12PF from ST(Semtech), in a DO-41. 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 on the DO-41 glass case; Zener voltage 11.4...12.7 V (12 V nominal) at IZT = 41.5 mA, maximum DC Zener current 152 mA. |
| 2 | A | passive | Anode lead of the DO-41 glass case Zener diode; power dissipation 2 W max, VF max 1.2 V at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | DO-41 |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Dynamic Resistance at IZT | rZjT | 4.5 | Ω | at IZT = 41.5 mA | 2 | ||
| Maximum Dynamic Resistance at IZK | rZjK | 700 | Ω | at IZK = 0.25 mA | 2 | ||
| Maximum Reverse Leakage Current | IR | 1 | µA | VR = 9.1 V | 2 | ||
| Maximum DC Zener Current | IZM | 152 | mA | leads at ambient temperature at 8 mm from case | 2 | ||
| Forward Voltage | VF | 1.2 | V | IF = 200 mA | 2 | ||
| Power Dissipation | Ptot | 2 | W | Ta = 25℃, leads at 8 mm from case kept at ambient temperature | 1 | ||
| Junction Temperature | Tj | 175 | ℃ | Ta = 25℃ | 1 | ||
| Storage Temperature Range | TStg | -65 | 175 | ℃ | Ta = 25℃ | 1 | |
| Thermal Resistance Junction to Ambient | RθJA | 75 | ℃/W | leads at 8 mm from case kept at ambient temperature | 1 | ||
| Zener Test Current | IZT | 41.5 | mA | Tj = 25℃ | 2 |
CAD (KiCad official)
- Symbol:
BZX2C12PF - Footprint:
Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal - 3D model: DO-41 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST(Semtech) datasheet (2 pp, sha256
7816ae8d70cbf200, retrieved 2026-10-23, 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).
# BZX2C12PF
**ST(Semtech)** · Zener Diodes · DO-41
BZX2C12PF from ST(Semtech), in a DO-41. 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 on the DO-41 glass case; Zener voltage 11.4...12.7 V (12 V nominal) at IZT = 41.5 mA, maximum DC Zener current 152 mA. |
| 2 | A | passive | Anode lead of the DO-41 glass case Zener diode; power dissipation 2 W max, VF max 1.2 V at IF = 200 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | DO-41 |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Dynamic Resistance at IZT | rZjT | | | 4.5 | Ω | at IZT = 41.5 mA | 2 |
| Maximum Dynamic Resistance at IZK | rZjK | | | 700 | Ω | at IZK = 0.25 mA | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | µA | VR = 9.1 V | 2 |
| Maximum DC Zener Current | IZM | | | 152 | mA | leads at ambient temperature at 8 mm from case | 2 |
| Forward Voltage | VF | | | 1.2 | V | IF = 200 mA | 2 |
| Power Dissipation | Ptot | | | 2 | W | Ta = 25℃, leads at 8 mm from case kept at ambient temperature | 1 |
| Junction Temperature | Tj | | | 175 | ℃ | Ta = 25℃ | 1 |
| Storage Temperature Range | TStg | -65 | | 175 | ℃ | Ta = 25℃ | 1 |
| Thermal Resistance Junction to Ambient | RθJA | | | 75 | ℃/W | leads at 8 mm from case kept at ambient temperature | 1 |
| Zener Test Current | IZT | | 41.5 | | mA | Tj = 25℃ | 2 |
## CAD (KiCad official)
- Symbol: `BZX2C12PF`
- Footprint: `Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal`
- 3D model: DO-41 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ST(Semtech) datasheet](docs/bzx2c12pf-datasheet.pdf) (2 pp, sha256 `7816ae8d70cbf200`, retrieved 2026-10-23, 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/bzx2c12pf-datasheet.pdf)