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LT219-3

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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Symbol & Footprint

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Datasheet

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Contents

README

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LT219-3

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

LT219-3 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 input infrared LED; the datasheet limits continuous LED current to 50 mA and LED reverse voltage to 5 V (absolute maximum ratings, page 2).
2 LED Cathode input Cathode of the GaAlAs input infrared LED; the same absolute maximum limits apply, with continuous LED current of 50 mA and LED reverse voltage of 5 V (page 2).
3 Drain (MOS FET) passive One drain of the output DMOS-FET switch; load voltage is rated 60 V (AC peak or DC) and load current 800 mA (absolute maximum ratings, page 2).
4 Drain (MOS FET) passive The other drain of the output DMOS-FET switch, forming the 1-Form A contact with pin 3; load voltage is rated 60 V (AC peak or DC) and load current 800 mA (page 2).

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
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 800 mA 2
Peak Load Current IPeak 4 A 100ms (1 pulse) 2
Output Power Dissipation Pout 380 mW 2
Total Power Dissipation PT 450 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
On-Resistance Ron 0.1 0.3 Ω IF=5mA, IL=100mA, time to flow is within 1 sec. 2

CAD (KiCad official)

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

Provenance

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

  • Datasheet: Letex datasheet (4 pp, sha256 6968bf4a29013dbd, retrieved 2026-10-16, 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