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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...
akknNews Solid Polymer vs Liquid Electrolytic Capacitors: What Drives Cost, Risk, and Stocking Strategy
Switching an electrolytic capacitor from liquid electrolyte to solid polymer is not a one-for-one substitution. The two ...
akknNews Sizing Capacitor Banks for Power Factor Correction: Voltage, Harmonics, and Inrush Duty
Power factor correction (PFC) capacitor banks are installed on low-voltage networks supplying induction motors, welding ...
akknNews How IGBT Switching Stress and Module Temperature Set Snubber Capacitor Life
A snubber capacitor mounted on an IGBT module operates in conditions that the datasheet reference ratings do not describ...
akknNews Replacement Capacitors for VFD Repair: Matching Ripple Current, ESR and Lifetime in the DC Link
When a VFD returns from the field with a bulged or leaking DC-link capacitor, the repair engineer tries to order the ori...
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