The Lambda/TDK/EMI LB703F is a passive power line filter designed to attenuate electromagnetic interference across conducted emission pathways. It suppresses both differential mode and common mode noise generated by switch-mode power supplies, protecting connected equipment and ensuring compliance with international EMC standards.
Technical Specifications
Frequency Response: Effective noise reduction up to 30 MHz across the conducted emissions spectrum.
Filtering Architecture: Passive L-C circuit topology using capacitors and inductors to block high-frequency current paths and divert noise away from load circuits.
Interference Suppression: Addresses differential mode and common mode noise components inherent to switching power supply operation.
– Key Features
• Passive component design — no active control or external power required
• Dual-mode noise rejection — handles both common and differential mode interference simultaneously
• Regulatory alignment — engineered to support compliance with EN 55011, EN 55032, EN 61000, and FCC Part 15
• Broad frequency coverage — conducted emissions attenuation across industrial switching frequency bands
– Typical Applications
• Industrial electronic systems requiring EMI suppression
• Medical device power conditioning
• Laboratory instrumentation with sensitive analog circuits
• Any application where electromagnetic compatibility is critical to system stability
– Compatibility & Integration
The LB703F integrates into AC power inlet stages and mains distribution circuits. It functions as a transparent component requiring no control interface or status monitoring. Manufactured by TDK-Lambda under strict process controls in company-owned facilities, with EMC validation available through TDK-Lambda’s global testing network.
