Lambda / TDK / EMI LR-612

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

• 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.