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LLDB3
Public Made by Adomby adom
YFW Diacs Trigger Diode, LL-34. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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LLDB3
YFW · Diacs Trigger Diode · LL-34
LLDB3 from YFW, 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 | 1 | passive | Terminal 1 of an unpolarised bidirectional ESD/TVS diode; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised bidirectional ESD/TVS diode; either orientation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakover Voltage (LLDB3) | VBO | 28 | 36 | V | at C = 22 nF, see diagram 1 | 1 | |
| Breakover Voltage Symmetry | [/+VBO/-/-VBO/] | 3 | V | at C = 22 nF, see diagram 1 | 1 | ||
| Dynamic Breakover Voltage | /ΔV±/ | 5 | V | at ΔI = [IBO to IF = 10 mA] | 1 | ||
| Output Voltage | VO | 5 | V | See diagram 2 | 1 | ||
| Breakover Current | IBO | 50 | µA | at C = 22 nF | 1 | ||
| Leakage Current | IB | 10 | µA | at VB = 0.5 VBO max | 1 | ||
| Rise Time | tr | 2 | µs | See diagram 3 | 1 | ||
| Power Dissipation | Ptot | 150 | mW | Ta = 65 °C | 1 | ||
| Repetitive Peak On-state Current | ITRM | 2 | A | tp = 20 µs, f = 100 Hz | 1 | ||
| Operating Junction and Storage Temperature Range | Tj, Tstg | -40 | 125 | °C | 1 |
CAD (KiCad official)
- Symbol:
LLDB3 - Footprint:
Diode_SMD:D_MiniMELF - 3D model: LL-34 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YFW datasheet (2 pp, sha256
290dde083f13f481, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal convention(convention), consensusoff(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).
# LLDB3
**YFW** · Diacs Trigger Diode · LL-34
LLDB3 from YFW, 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 | 1 | passive | Terminal 1 of an unpolarised bidirectional ESD/TVS diode; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised bidirectional ESD/TVS diode; either orientation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakover Voltage (LLDB3) | VBO | 28 | | 36 | V | at C = 22 nF, see diagram 1 | 1 |
| Breakover Voltage Symmetry | [/+VBO/-/-VBO/] | | | 3 | V | at C = 22 nF, see diagram 1 | 1 |
| Dynamic Breakover Voltage | /ΔV±/ | 5 | | | V | at ΔI = [IBO to IF = 10 mA] | 1 |
| Output Voltage | VO | 5 | | | V | See diagram 2 | 1 |
| Breakover Current | IBO | | | 50 | µA | at C = 22 nF | 1 |
| Leakage Current | IB | | | 10 | µA | at VB = 0.5 VBO max | 1 |
| Rise Time | tr | | | 2 | µs | See diagram 3 | 1 |
| Power Dissipation | Ptot | | | 150 | mW | Ta = 65 °C | 1 |
| Repetitive Peak On-state Current | ITRM | | | 2 | A | tp = 20 µs, f = 100 Hz | 1 |
| Operating Junction and Storage Temperature Range | Tj, Tstg | -40 | | 125 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `LLDB3`
- Footprint: `Diode_SMD:D_MiniMELF`
- 3D model: LL-34 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [YFW datasheet](docs/lldb3-datasheet.pdf) (2 pp, sha256 `290dde083f13f481`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal convention` (convention), consensus `off` (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/lldb3-datasheet.pdf)