Industry News
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Is Higher DC-Link Capacitance Always Better
Many engineers evaluate DC-link capacitors based only on capacitance and voltage rating. In high-power applications such as EVs, motor drives, inverters, and energy storage systems, that’s far from enough. A reliable DC-link capacitor should also be validated under real operating co...Read more -
Why Safety Capacitors Matter in EV Charging Stations
As EV charging stations continue to deliver higher power and faster charging speeds, EMI suppression and electrical safety become increasingly critical. Safety capacitors are key components in the AC input stage of EV chargers. X safety capacitors suppress differential-mode noise be...Read more -
Key Capacitors for Reliable EV Traction Inverters
As EV traction inverters move toward higher switching frequencies and higher power density, capacitor selection directly affects EMI performance, DC bus stability, and system reliability. Choosing the wrong capacitor can lead to increased switching noise, voltage overshoot, reduced invert...Read more -
Surge Protection Challenges in Compact Charger Designs
The Challenge A fast charger manufacturer was struggling to pass surge immunity testing. The limited PCB space made it difficult to achieve both sufficient surge protection and efficient thermal management using the existing design. JEC’s Solution After reviewing the application, JEC...Read more -
How Capacitors Support Electric Vehicles
Electric vehicles contain multiple power electronic systems, including battery management systems (BMS), onboard chargers (OBC), DC-DC converters, and motor control units. These systems require capacitors to manage electrical energy and maintain stable operation. Capacitors help to: Stabi...Read more -
How to Choose a Reliable Safety Capacitor Supplier
Safety capacitors account for only a small portion of the BOM, but choosing the wrong supplier can lead to EMC failures, safety certification delays, production downtime, and costly field returns. When evaluating an X/Y safety capacitor supplier, look beyond price and focus on these four f...Read more -
Why Proper NTC Selection Matters in EV OBC Circuits
In electric vehicle on-board chargers (OBCs), DC bus capacitors typically range from 470μF to 2200μF. Without effective pre-charge protection, the large inrush current generated during startup can damage power semiconductors, relays, and other critical components. Repeated current surges may also...Read more -
Case Study: Eliminating Electrolytic Capacitor Lead Failures
A leading inverter air conditioner manufacturer experienced intermittent failures in outdoor controller boards during production and field operation. After investigation, the failures were traced to mechanical stress on electrolytic capacitor leads in both the switching power supply and co...Read more -
Ceramic Capacitors VS Film Capacitors in High-Frequency Applications
When designing high-frequency, high-voltage circuits, a common question engineers ask is: Should I choose film capacitors or high-voltage ceramic capacitors? In high-frequency circuits, two parameters largely determine capacitor performance: Equivalent Series Resistance (ESR) Equivalent Se...Read more -
What Should You Do If a Varistor Fails
Varistors are widely used in power supplies, surge protectors, industrial equipment, and home appliances to protect circuits from lightning strikes and transient overvoltage events. However, after absorbing excessive surge energy, a varistor may eventually fail. Knowing how to identify an...Read more -
Select the Right Electrolytic Capacitor for Power Designs
Electrolytic capacitors remain one of the most widely used components in power supplies, motor drives, renewable energy systems, and industrial equipment. Their high capacitance density and cost-effectiveness make them ideal for energy storage, ripple filtering, and voltage stabilization. ...Read more -
Case Study – Solving Resistor Cracking After PCB Assembly
A customer manufacturing industrial control boards experienced intermittent failures during final testing. Several resistors showed open-circuit conditions after PCB depaneling, resulting in reduced production yield and increased rework costs. JEC’s Analysis Initial investigation rev...Read more