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Reading Bulge, Leakage, and Open-Circuit Evidence to Pick a Safer Electrolytic Replacement
When an aluminum electrolytic capacitor fails in a power supply or motor-drive board, the removed part often carries vis...
akknNews Field Failure Diagnosis: Solid Polymer vs Liquid Electrolytic Capacitors in DC-Link Duty
A 48 V DC-link rail in a telecom rectifier showed 1.1 V of ripple during a load-step test, more than three times the spe...
akknNews Specifying Power-Factor Correction Capacitor Banks: Harmonics, Overvoltage, and Bank Sizing
Application Boundary: Where PFC Capacitor Banks Apply Power-factor correction (PFC) capacitor banks are installed at the...
akknNews IGBT Snubber Capacitors: Total-Cost Drivers, Equal-Term Comparison, and Incoming Inspection
A snubber capacitor on an IGBT module is a small part with an outsized role: it clamps the voltage overshoot during hard...
akknNews DC-Link Electrolytic Lifetime in VFD Repair: Ripple, Temperature, and Replacement Sourcing
The Lifetime Model Behind Drive Failures When a variable frequency drive (VFD) returns from the field with a bulged or l...
akknNews Cross-Referencing Obsolete European Capacitor Series: Which Ratings Demand Exact Equivalence
Why legacy European capacitor series leave the market European capacitor manufacturing has consolidated heavily over the...
akknNews Ambient-Temperature Derating in Bulk Electrolytics: Diagnosing Early End-of-Life in Sealed Enclosures
A mid-sized industrial drive returned from the field with a visibly bulged snap-in capacitor after roughly eighteen mont...
akknNews Applying Ripple-Current and ESR Limits When Sourcing Capacitors for Switching Regulators
Capacitors in switching regulators do not merely hold charge; they absorb repeated pulsed currents that generate heat in...
akknNews DC-Bias Capacitance Drop in Class 2 MLCCs: Sourcing Checks Before Substitution
For design engineers and sourcing specialists comparing MLCC offers, the capacitance value printed on a datasheet is a s...
akknNews Reading dV/dt and Self-Healing in Film Capacitors: Practical Limits for Snubber and DC-Link Duty
Motor drives and grid-tied inverters built around IGBT modules place two different kinds of stress on film capacitors. O...
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