PFC chokes

A PFC choke (Power Factor Correction choke) is used to improve the power factor and reduce mains interference in electronics such as power supplies and frequency converters. By smoothing the current flow and making it more sinusoidal, the choke reduces the load on the electrical grid and increases energy efficiency. With a robust design and strong EMC characteristics, PFC chokes contribute to more stable operation, lower losses, and easier compliance with international standards.

Passive PFC uses a large inductor (PFC choke) to improve the power factor. It operates at the mains fundamental frequency (50/60 Hz), which makes it physically larger and heavier.

Characteristics:

• Simpler and more cost-effective solution
• Lower efficiency
• Larger and heavier components
• Works best with fixed loads and lower power levels

Active PFC uses an electronic circuit (switching regulator) that actively shapes the current so that it closely follows the voltage.

Characteristics:

• Very high power factor
• Compact and lightweight design
• Operates across a wide input voltage range (e.g., 90–264 V)
• Better energy efficiency and lower mains interference
• Requires additional components

Active PFC is the standard in modern power supplies, industrial electronics, and equipment that must meet strict EMC requirements.

We help you develop a PFC choke tailored to your application.