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ZMM55C51
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FUXINSEMI Zener Diodes, LL-34. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ZMM55C51
FUXINSEMI · Zener Diodes · LL-34
ZMM55C51 from FUXINSEMI, in a LL-34. 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 color band on the LL-34/SOD-80 body, which indicates negative polarity. |
| 2 | A | passive | Anode terminal of the zener diode, the end opposite the cathode color band. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | LL-34 |
| 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 |
|---|---|---|---|---|---|---|---|
| Power Dissipation | 500 | mW | TA = 25°C | 1 | |||
| Storage Temperature Range | -65 | 175 | °C | TA = 25°C | 1 | ||
| Operating Junction Temperature | 175 | °C | TA = 25°C | 1 | |||
| VZ tolerance (ZMM55C series) | VZ | -5 | 5 | % | 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 | Matte Tin (Sn) Terminal Finish Color band Indicates Negative Polarity | 1 |
CAD (KiCad official)
- Symbol:
ZMM55C51 - Footprint:
Diode_SMD:D_MiniMELF - 3D model: LL-34 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FUXINSEMI datasheet (4 pp, sha256
5d3d79fdfa5a1cac, 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).
# ZMM55C51
**FUXINSEMI** · Zener Diodes · LL-34
ZMM55C51 from FUXINSEMI, in a LL-34. 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 color band on the LL-34/SOD-80 body, which indicates negative polarity. |
| 2 | A | passive | Anode terminal of the zener diode, the end opposite the cathode color band. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | LL-34 |
| 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 |
|---|---|---|---|---|---|---|---|
| Power Dissipation | | | | 500 | mW | TA = 25°C | 1 |
| Storage Temperature Range | | -65 | | 175 | °C | TA = 25°C | 1 |
| Operating Junction Temperature | | | | 175 | °C | TA = 25°C | 1 |
| VZ tolerance (ZMM55C series) | VZ | -5 | | 5 | % | | 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 | Matte Tin (Sn) Terminal Finish Color band Indicates Negative Polarity | 1 |
## CAD (KiCad official)
- Symbol: `ZMM55C51`
- Footprint: `Diode_SMD:D_MiniMELF`
- 3D model: LL-34 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [FUXINSEMI datasheet](docs/zmm55c51-datasheet.pdf) (4 pp, sha256 `5d3d79fdfa5a1cac`, 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/zmm55c51-datasheet.pdf)