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AT851-CUH-S AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

AT851-CUH-S product

AT851-CUH-S

Photovoltaic Output

phototransistor optocoupler5000 Vrms isolation350 V VCEO4-pin optoisolator

AT851 is a 4-pin phototransistor optocoupler providing 5000 Vrms input-output isolation and a 350 V collector-emitter rating.

Best for

  • Galvanically isolated digital or analog signal interfaces
  • Industrial control and power-system feedback circuits

Avoid if

  • The application requires a verified lifecycle commitment or guaranteed supply data
  • The design needs specifications outside the stated voltage, current, temperature, or isolation limits

Check before use

  • Package selection: DIP4, DIP4-M, or SMD4
  • CTR at the actual LED current and collector-emitter voltage
  • Isolation and PCB creepage requirements

Key specifications

Isolation voltage
5000 Vrms
Collector-emitter voltage
350 V
CTR
50-600 % at IF=1 mA, VCE=5 V
Operating temperature
-55 to +110 °C

Compliance & Environment

RoHS
Compliant
REACH
Compliant
MSL
Class 1
ECCN
-
HTSUS
-

Application

Industrial controlPower systemsMeasurement isolationConsumer electronics

Datasheet

6c8c1da3eede1d638b8f21da3d315c84_AT851-CuH-S.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for AT851-CUH-S: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

AT851 is a phototransistor optocoupler with a 4-pin input LED and phototransistor output. It is specified for 5000 Vrms isolation and 350 V collector-emitter voltage.