AKKN ElectronicsSourcing Capacitors by Voltage Margin and Surge Withstand: Cost Drivers, Inspection, Stocking
Voltage derating is sometimes treated as a free, conservative habit. In practice it has a price: a 400 V rated electroly...
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akknNews Spotting Re-Marked Capacitors at Incoming Inspection: A Stress-Derived Screening Checklist
A re-marked capacitor is not a benign substitution. The marking may match a 450 V, 100 µF, 105 °C part, b...
akknNews Derating Hot-Spot Temperature: Extending Capacitor Lifetime in High-Ambient Industrial Designs
In an aluminum electrolytic capacitor, wear-out is governed by electrolyte evaporation through the vent and seals. The e...
akknNews Aligning ESR and Ripple Current When Substituting Output Capacitors in Switching Supplies
When an output capacitor series is discontinued or its lead time stretches beyond the production schedule, the replaceme...
akknNews Field Failure or Measurement Trap? DC Bias Derating in Low-Reading MLCCs
A quality engineer pulls five samples from a received reel of 10 µF, 0805, X7R MLCCs and measures them with the incoming...
akknNews How to Set dV/dt Ratings for Film Capacitors: Self-Healing Limits and Derating Rules
A film capacitor that passes capacitance, ESR, and insulation checks can still fail early in service if the circuit impo...
akknNews DC-Link Capacitor Sourcing for Inverters: Cost Drivers, Bid Comparison, and Inspection Checklist
In an inverter, the DC-link capacitor bank sits between the rectifier or input converter and the switching stage. It hol...
akknNews Thermal Design of Capacitor Bank Replacements: Core Temperature, Cooling, and Ripple Current Limits
When a capacitor bank in a power converter fails, the standard reaction is to match capacitance, rated voltage, and case...
akknNews Capacitor Failure in Solar Inverters and Storage: Field Diagnosis and Replacement Criteria
Field symptom: a 30 kW three-phase PV inverter returns from a rooftop installation with a DC-link undervoltage alarm aft...
akknNews Choosing Replacement Capacitors After Bulging, Leakage, and Open-Circuit Failures
Define the Application Boundary First When a capacitor fails in the field, the visible symptom — bulged vent, electrolyt...
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