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LLDB4
Public Made by Adomby adom
MSKSEMI Trigger Diodes, 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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLLDB4
MSKSEMI · Trigger Diodes · LL-34
LLDB4 from MSKSEMI, 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 (LLDB4) | VBO | 35 | 45 | V | at C = 22 nF, see diagram 1 | 2 | |
| Breakover Voltage Symmetry | [/+VBO /-/-VBO/] | 3 | V | at C = 22 nF, see diagram 1 | 2 | ||
| Dynamic Breakover Voltage | / ΔV ± / | 5 | V | at ΔI = [IBO to IF = 10 mA] | 2 | ||
| Output Voltage | VO | 5 | V | See diagram 2 | 2 | ||
| Breakover Current | IBO | 50 | µA | at C = 22 nF | 2 | ||
| Leakage Current | IB | 10 | µA | at VB = 0.5 VBO max | 2 | ||
| Rise Time | tr | 2 | µs | See diagram 3 | 2 | ||
| Power Dissipation | Ptot | 150 | mW | Ta = 65 °C | 2 | ||
| Repetitive Peak On-state Current | ITRM | 2 | A | tp = 20 µs, f = 100 Hz | 2 | ||
| Operating Junction and Storage Temperature Range | Tj, Tstg | -40 | 125 | °C | 2 |
CAD (KiCad official)
- Symbol:
LLDB4 - Footprint:
Diode_SMD:D_MiniMELF - 3D model: LL-34 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (4 pp, sha256
9f18adaedabd2216, retrieved 2026-10-16, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band 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).