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LLDB3

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by 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, 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