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Electromagnetic interference filters: top picks
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Best overall TDK-LambdaTDK Lambda ZWS10-5
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
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Best value SCHAFFNERSchaffner FN2030-6-06
Cost-effective single-phase filter with excellent performance for general industrial equipment.
- Great value
- Wide availability
- Good attenuation
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Best for DC circuits
Murata BNX022-01
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
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Best for high current TE Connectivity / AMPTE Connectivity 1-6609128-1
Robust three-phase filter rated for 20A, suitable for heavy industrial machinery.
- High current rating
- Durable construction
- Three-phase
- Bulkier size
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Best budget pick GenericWürth Elektronik 744840018
Low-cost common mode choke for basic EMI suppression in low-power designs.
- Very affordable
- Compact
- Easy to integrate
- Limited attenuation
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Best for single phase
EPCOS B84143A0008R105
Standard single-phase filter with robust performance and safety approvals.
- Certified
- Good performance
- Easy mounting
- Fixed mount
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Best for PCB mounting
Panasonic EL3H7A
Through-hole EMI filter with high insertion loss for PCBs, suitable for space-constrained designs.
- PCB mount
- High loss
- Low cost
- Through-hole only