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BZV55C39 L1G
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Taiwan Semiconductor Zener Diodes, MiniMELF. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BZV55C39 L1G
Taiwan Semiconductor · Zener Diodes · MiniMELF
BZV55C39 L1G from Taiwan Semiconductor, in a MiniMELF. 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; the Zener (BZV55C39 VZ 37-41V at IZT 2.5mA) regulates when this terminal is reverse-biased positive relative to the anode. |
| 2 | A | passive | Anode terminal of the single-die Zener diode; forward voltage VF is 1V at IF=10mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Taiwan Semiconductor |
| Package | MiniMELF |
| 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 | 37 | 39 | 41 | V | IZT = 2.5 mA, TA = 25°C | 2 |
| Zener voltage tolerance | -5 | 5 | % | standard tolerance on nominal zener voltage | 3 | ||
| Test current | IZT | 2.5 | mA | TA = 25°C | 2 | ||
| Dynamic impedance | ZZT | 90 | Ω | @ IZT = 2.5 mA | 2 | ||
| Knee impedance | ZZK | 500 | Ω | @ IZK = 0.5 mA | 2 | ||
| Knee test current | IZK | 0.5 | mA | 2 | |||
| Reverse leakage current | IR | 0.1 | µA | VR = 28 V | 2 | ||
| Forward voltage | VF | 1 | V | IF = 10 mA, TA = 25°C | 1 | ||
| Power dissipation | PD | 500 | mW | TA = 25°C | 1 | ||
| Junction temperature range | TJ | -65 | 175 | °C | 1 | ||
| Storage temperature range | TSTG | -65 | 175 | °C | 1 | ||
| Junction-to-ambient thermal resistance | RӨJA | 300 | °C/W | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | ● Terminal: Matte tin plated leads, solderable per J-STD-002 ● Polarity: Indicated by cathode band | 1 |
CAD (KiCad official)
- Symbol:
BZV55C39 L1G - Footprint:
Diode_SMD:D_MiniMELF - 3D model: MiniMELF (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Taiwan Semiconductor datasheet (6 pp, sha256
e108fdeec0e282cf, retrieved 2026-10-27, 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).
# BZV55C39 L1G
**Taiwan Semiconductor** · Zener Diodes · MiniMELF
BZV55C39 L1G from Taiwan Semiconductor, in a MiniMELF. 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; the Zener (BZV55C39 VZ 37-41V at IZT 2.5mA) regulates when this terminal is reverse-biased positive relative to the anode. |
| 2 | A | passive | Anode terminal of the single-die Zener diode; forward voltage VF is 1V at IF=10mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Taiwan Semiconductor |
| Package | MiniMELF |
| 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 | 37 | 39 | 41 | V | IZT = 2.5 mA, TA = 25°C | 2 |
| Zener voltage tolerance | | -5 | | 5 | % | standard tolerance on nominal zener voltage | 3 |
| Test current | IZT | | 2.5 | | mA | TA = 25°C | 2 |
| Dynamic impedance | ZZT | | | 90 | Ω | @ IZT = 2.5 mA | 2 |
| Knee impedance | ZZK | | | 500 | Ω | @ IZK = 0.5 mA | 2 |
| Knee test current | IZK | | 0.5 | | mA | | 2 |
| Reverse leakage current | IR | | | 0.1 | µA | VR = 28 V | 2 |
| Forward voltage | VF | | | 1 | V | IF = 10 mA, TA = 25°C | 1 |
| Power dissipation | PD | | | 500 | mW | TA = 25°C | 1 |
| Junction temperature range | TJ | -65 | | 175 | °C | | 1 |
| Storage temperature range | TSTG | -65 | | 175 | °C | | 1 |
| Junction-to-ambient thermal resistance | RӨJA | | 300 | | °C/W | | 1 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | ● Terminal: Matte tin plated leads, solderable per J-STD-002 ● Polarity: Indicated by cathode band | 1 |
## CAD (KiCad official)
- Symbol: `BZV55C39 L1G`
- Footprint: `Diode_SMD:D_MiniMELF`
- 3D model: MiniMELF (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Taiwan Semiconductor datasheet](docs/bzv55c39-l1g-datasheet.pdf) (6 pp, sha256 `e108fdeec0e282cf`, retrieved 2026-10-27, 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/bzv55c39-l1g-datasheet.pdf)