In high-current applications, initial tolerance often looks good on paper, but long-term drift under continuous load is where things get tricky. Even with low TCR parts, thermal cycling, sustained self-heating, and mechanical stress can gradually shift resistance over time. In battery or power systems running 24/7, small resistance changes can accumulate into noticeable measurement errors.
How do you typically evaluate long-term stability in your designs? Do you rely mainly on datasheet load-life specs, or do you run extended burn-in / temperature cycling tests in-house? I’m interested in how others validate drift behavior beyond the initial specification.
