The Lambda/TDK LR-612 is a passive EMI filter designed to suppress electromagnetic interference across conducted and radiated pathways. It employs L-C circuits with ferrite cores to attenuate differential and common mode noise, making it essential for systems requiring signal integrity and EMC compliance. The filter addresses high-frequency noise up to 30 MHz and meets stringent international standards including EN 55011, EN 55032, EN 61000, and FCC Part 15, supporting both Class A and Class B conducted emissions requirements depending on application configuration.
Technical Specifications
Electrical Characteristics
• Input voltage: 95–132 VAC or 187–265 VAC, 47–440 Hz (user-selectable)
• Frequency response: Effective to 30 MHz for conducted emissions; assists with radiated EMI
• Standards: EN 55011, EN 55032, EN 61000, FCC Part 15
• Emissions class: Class A and Class B (application-dependent)
Construction
• Filter topology: Passive L-C circuits
• Core material: Ferrite
• Housing: Halogen-free plastic, RoHS II and REACH compliant
– Key Features
• Differential and common mode noise rejection
• Optimized for switch-mode power supply environments
• Minimal insertion loss at line frequency
• Temperature rise consideration: Higher current ratings may reduce voltage drop effects
• Insertion loss increases with line current; thermal effects manageable through model selection
– Typical Applications
• Power supply units
• Industrial automation and process control
• Factory and building automation systems
• Robotics
• Test and measurement instrumentation
• Semiconductor fabrication equipment
• Sensitive laboratory systems requiring strict EMC compliance
– Compatibility & Integration
The LR-612 integrates into AC-powered systems operating at 47–440 Hz. Model-specific current ratings and voltage drop characteristics are available in the product datasheet. Selection should account for thermal performance when operating at sustained line currents.
