component

LT219-2

Public Made by Adom

by adom

Letex Solid State Relays (MOS Output), SOP-4-2.54mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LT219-2

Letex · Solid State Relays (MOS Output) · SOP-4-2.54mm

LT219-2 from Letex, in a SOP-4-2.54mm. 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 LED Anode input Anode of the GaAlAs infrared input LED, with continuous LED current limited to 50 mA and LED reverse voltage limited to 5 V.
2 LED Cathode passive Cathode of the input LED; the datasheet gives an operating LED current of 0.5 to 2.0 mA (IF on) and a TTL/CMOS-compatible drive requirement.
3 Drain (MOS FET) passive Drain of the output MOSFET switch, rated for a load voltage of 60 V (AC peak or DC) and a load current of 400 mA.
4 Drain (MOS FET) passive Drain of the output MOSFET switch (second drain terminal of the 1-Form A output), rated for a load voltage of 60 V (AC peak or DC) and a load current of 400 mA.

Key specifications

Parameter Value
Manufacturer Letex
Package SOP-4-2.54mm
Category Optoisolators
Pins 4

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
LED Forward Voltage VF 1.2 1.4 V IF=10mA 2
Operation LED Current IF on 0.5 2 mA 2
Recovery LED Current IF off 0.35 0.5 mA 2
Recovery LED Voltage VF off 0.7 V 2
On-Resistance Ron 0.2 0.5 Ω IF=5mA, IL=100mA, time to flow is within 1 sec 2
Off-State Leakage Current ILeak 1 uA VL=Rating 2
Turn-On Time Ton 1 1.3 ms IF=5mA, IL=100mA 2
Turn-Off Time Toff 0.6 0.8 ms 2
I/O Capacitance CI/O 0.8 1.5 pF f=1MHz 2
Continuous LED Current IF 50 mA 2
Peak LED Current IFP 1000 mA f=100Hz, duty=1% 2
LED Reverse Voltage VR 5 V 2
Input Power Dissipation PIn 75 mW 2
Load Voltage VL 60 V AC peak or DC 2
Load Current IL 400 mA 2
Peak Load Current IPeak 1 A 100ms (1 pulse) 2
Output Power Dissipation Pout 350 mW 2
Total Power Dissipation PT 400 mW 2
I/O Breakdown Voltage VI/O 1500 Vrms RH=60%, 1min 2
Operating Temperature Topr -40 85 ℃ 2
Storage Temperature Tstg -40 100 ℃ 2
Pin Soldering Temperature Tsol 260 ℃ 10 sec max. 2
Output Capacitance Cout 115 pF VL=0, f=1MHz 2

CAD (KiCad official)

  • Symbol: LT219-2
  • Footprint: Package_SO:SOP-4_3.8x4.1mm_P2.54mm
  • 3D model: SOP-4-2.54mm (KiCad packages3D, STEP)
  • 3D model files: lt219-2-etched.step / lt219-2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt219-2.step / lt219-2.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Letex datasheet (4 pp, sha256 23e79f3426c47252, retrieved 2026-10-15, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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