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Top rated electromagnetic interference filters

AI-generated summary · updated July 27, 2026 · verify details before purchase.

  1. Best overall

    TDK Lambda ZWS10-5

    4.5/5 $25-$40

    Compact and reliable EMI filter with high attenuation and low leakage current, ideal for industrial applications.

    • High attenuation
    • Low leakage
    • Compact size
    • Limited to 10A
  2. Best value

    Schaffner FN2030-6-06

    4.7/5 $15-$25

    Cost-effective single-phase filter with excellent performance for general industrial equipment.

    • Great value
    • Wide availability
    • Good attenuation
  3. Best for DC circuits

    Murata BNX022-01

    4.6/5 $10-$20

    SMD EMI filter for DC power lines, offering high insertion loss in a small package.

    • SMD package
    • High DC rating
    • Broad frequency range
    • Solder required
  4. Best for high current

    TE Connectivity 1-6609128-1

    4.4/5 $30-$50

    Robust three-phase filter rated for 20A, suitable for heavy industrial machinery.

    • High current rating
    • Durable construction
    • Three-phase
    • Bulkier size
  5. Best budget pick

    Würth Elektronik 744840018

    4.3/5 $5-$15

    Low-cost common mode choke for basic EMI suppression in low-power designs.

    • Very affordable
    • Compact
    • Easy to integrate
    • Limited attenuation
  6. Best for single phase

    EPCOS B84143A0008R105

    4.5/5 $20-$35

    Standard single-phase filter with robust performance and safety approvals.

    • Certified
    • Good performance
    • Easy mounting
    • Fixed mount
  7. Best for PCB mounting

    Panasonic EL3H7A

    4.2/5 $8-$12

    Through-hole EMI filter with high insertion loss for PCBs, suitable for space-constrained designs.

    • PCB mount
    • High loss
    • Low cost
    • Through-hole only

Buying advice

When selecting an EMI filter, consider the current rating, voltage, and frequency range required for your application. Also check the insertion loss at the problematic frequencies, and ensure the filter has appropriate safety certifications (e.g., UL, EN) for your region. Size and mounting type (chassis, PCB, SMD) may also be important depending on your enclosure.

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