Lesson 12/1771%
MODULE 12

Failure Mechanisms

How optocouplers die: LED light-output degradation kinetics, CTR drift signatures in field data, thermal and moisture stress paths, ESD damage patterns, and the rare but serious isolation barrier breakdown — with screening and prevention strategies for each.

⏳ Coming Soon — content in development

Learning Objectives

After completing this module, you will be able to:

Explain LED aging physics and acceleration factors
Recognize CTR degradation signatures in returned units
Assess thermal, moisture, and ESD stress risks
Analyze isolation breakdown causes and precursors
Define screening and prevention measures

Planned Topics

LED aging
CTR degradation
Thermal stress
Moisture effects
ESD damage
Isolation breakdown

Reserved Sections

This module will follow the same interactive format as Module 1:

Interactive animations

Animated diagrams and simulations for this module are in development.

Engineering calculators

Module-specific design calculators will appear here.

Design examples

Worked examples with full component values are planned for this section.

Knowledge check

Multiple-choice, true/false, and scenario exercises will be added.

Downloadable resources

PDF notes, reference tables, and checklists will be provided.

While you wait: Module 1 — Introduction to Optocouplers — is fully available, including animations, the CTR and isolation calculators, and a complete knowledge check. Start there →