Lambda / TDK / EMI H22127

The TDK-Lambda EMI H22127 is a passive LC filter that suppresses common-mode and differential-mode noise in electronic systems. It employs inductors and capacitors to attenuate conducted emissions while permitting DC and low-frequency currents to pass unimpeded. The filter addresses noise generated during power conversion and that coupled through parasitic capacitance, enabling compliance with EMC standards including EN 55011, EN 55032, EN 61000, and FCC Part 15.

– Technical Specifications

• Frequency Range: Effective for conducted emissions up to 30 MHz; interference voltage measurements span 150 kHz to 30 MHz
• Voltage Rating: Specific ratings vary by model; AC-rated filters rated for 50/60 Hz can operate at DC provided voltage does not exceed rated specification
• Current Rating: Model-dependent
• Leakage Current: Select variants, particularly those for medical applications, feature low leakage specifications (e.g., 0.01 mA or 10 µA at 250 VAC)
• Noise Suppression: Inductors pass DC and low-frequency signals; capacitors shunt high-frequency noise to ground or back into the power supply

– Key Features

• Dual-mode noise suppression (common-mode and differential-mode)
• Terminal, flat connector, or busbar connection options
• Multiple form factors for wall mounting and switch cabinet installation
• Designed for extended operational periods

– Typical Applications

• Industrial power supplies and equipment
• Medical devices (certified variants)
• Systems requiring EMC standard compliance

– Compatibility & Integration

The H22127 integrates into circuits via terminals, flat connectors, or busbars. Physical dimensions and materials are model-dependent. Voltage and current specifications must be verified against the specific model variant prior to installation.