Design for Reliability
Products built to last — by design, not by chance. Decades of expertise condensed into structured design rules that guarantee product lifespan.
Reliability Is Engineered, Not Assumed
Field failures are expensive. They generate warranty costs, logistics complexity, customer dissatisfaction, and — in regulated industries — potential liability. The vast majority of field failures are not random events; they are the predictable consequence of design decisions made without sufficient reliability engineering rigor.
Components operated beyond their derated limits, thermal environments that shorten capacitor lifetimes, inadequate protection against transient overstress, or designs with insufficient margin against component tolerance variation — these are the root causes behind most field failures. And in most cases, they are entirely preventable through disciplined design practice.
At Pabst Electronics, we treat reliability as a quantifiable engineering requirement. We do not design products and hope they are reliable — we apply structured analysis methods that make reliability predictable and verifiable before the first prototype is built.
Reliability Engineering Methods
How We Make Reliability Predictable
📉 Component Derating Analysis
Every active and passive component in a Pabst Electronics design is operated at a fraction of its maximum rated stress — voltage, current, power, and temperature. This derating discipline, applied systematically, is one of the most effective reliability improvement techniques available. Our derating guidelines are based on decades of experience and are applied as mandatory design rules, not optional checks.
🌡️ Thermal Analysis
Heat is the primary enemy of electronics reliability. We perform thermal analysis at the component and system level to verify that every heat-generating component operates within its derated temperature range under worst-case ambient and load conditions. This includes junction temperature estimation, thermal resistance modeling, and heatsink or airflow requirement definition.
📊 Worst-Case Circuit Analysis (WCCA)
A circuit that works perfectly with nominal component values may fail in the field when components drift toward their tolerance limits over time and temperature. We perform worst-case circuit analysis on critical circuit blocks to verify that functional performance is maintained across the full range of component tolerances, supply voltage variation, and temperature extremes.
⚡ Protection Circuit Design
Transient overstress — from ESD, line surge, load dump, and other sources — is a leading cause of premature field failures. We design and evaluate protection circuits that intercept these events before they can damage sensitive components, and verify their effectiveness against the relevant IEC 61000-4 immunity test levels.
🔁 Design Life Verification
For electromechanical components such as relays, connectors, switches, and electrolytic capacitors, we calculate and verify expected service life under the actual operating conditions of the product — including switching frequency, ripple current, and ambient temperature — to ensure the design meets its target service life.
- Derating analysis report — every component stress verified
- Thermal analysis — junction temperatures under worst-case conditions
- Worst-case circuit analysis for critical circuit blocks
- Protection circuit design and evaluation report
- Reliability design review checklist
Want a Product That Lasts Its Full Intended Lifespan?
Talk to our reliability engineers about your product requirements. We will define the analysis methods needed and build them into your development program.
Contact a Reliability Engineer