3 Inch Ferrite Ring Core for Industrial Power Systems

3 Inch Ferrite Ring Core

This 3 inch ferrite ring core delivers reliable electromagnetic interference (EMI) suppression and signal noise filtering in industrial power systems. Commonly offered in mix 31 or 43 material formulations, it is optimized for RFI/EMI attenuation within the frequency range of approximately 1 MHz to 600 MHz—suitable for solar inverters, UPS systems, and motor drive controllers.

The core is designed with a precise toroidal shape and uniform cross-section for optimal magnetic flux distribution. Its typical internal diameter of around 3 inches makes it ideal for passing large cable bundles or multiple wire turns, significantly increasing choking impedance. Ferrite cores fabricated from manganese-zinc compositions offer high initial permeability and efficient suppression of high-frequency noise while maintaining low losses in power conversion applications.

By routing power or signal cables through the ring core one or more times, the effective impedance multiplies, enhancing noise rejection—especially effective in inverter circuits and renewable energy systems. The core’s durable ceramic ferrite construction ensures stability across temperature extremes and long-term reliability. It is compatible with industrial-grade designs such as solar inverters, UPS supplies, motor controllers, and telecom assemblies that demand clean power and minimal EMI.

Key Specs – 3″ Ferrite Ring Core Core OD (outer diameter): approx. 3 inches (76 mm) Core ID (inner diameter): suitable to accommodate cable bundles or multiple turns Material: MnZn ferrite, mix 31 or 43 (EMI suppression from 1–600 MHz) Typical Permeability (µ₁): in the range 800–3000, depending on mix Applications: EMI/RFI filtering, common-mode choke, balun/transformer construction, power noise suppression Suitable Uses: Solar inverter wiring, UPS systems, motor drive bundles, industrial power electronics