EMC Certification Improvement Case with VIP4‑2B‑10(B042Q0551) Power Line Filter

One industrial equipment manufacturer failed the EMC certification test due to excessive electromagnetic interference on the finished unit. Both common‑mode and differential‑mode noise existed in the equipment, which affected system stability and blocked the certification progress.

  The customer’s device adopts single‑phase AC power supply with 115/250VAC rated voltage and max operating current of 10A. Its internal circuits are sensitive to electromagnetic noise, requiring a power‑input filter to suppress line‑borne interference.
  After technical evaluation, the customer selected our VIP4‑2B‑10(B042Q0551) two‑stage single‑phase EMC power line filter.

This filter is rated for 115/250VAC and 10A RMS. The two‑stage coil circuit suppresses both common‑mode and differential‑mode noise, delivering excellent insertion‑loss performance under the 50‑ohm test system. It features controlled leakage current, 2000VAC line‑to‑ground hi‑pot rating, insulation resistance ≥100M ohm, and operating temperature range of ‑25℃ ~ +100℃, well‑suited for long‑term operation of industrial equipment.

  After installing VIP4‑2B‑10(B042Q0551) at the equipment power inlet, conducted and radiated electromagnetic noise from power lines was effectively attenuated. Re‑test results met EMC standards, helping the customer pass certification and realize mass production.

  Shenzhen VIIP Electronics focuses on EMC components. We provide technical support and component selection including ferrite cores and power filters for customers facing EMC‑test‑failure issues