ICM1812ER121V

Common Mode Chokes Overview

The Vishay Dale ICM1812ER121V is a common mode choke filter from the ICM-1812 series, designed for surface mount PCB integration. It features an unshielded ferrite core construction with SMD/SMT termination. The component provides an impedance of 120 Ohms at a test frequency of 100 MHz and maintains a tolerance of 25%. It operates within a temperature range of -40°C to +125°C and exhibits a maximum DC resistance of 50 mOhms. The physical dimensions are 4.5 mm in length, 3.2 mm in width, and 2.8 mm in height.

Common Mode Chokes Feature Summary

• Unshielded ferrite core design for compact signal line filtering
• High thermal stability supporting operation up to +125°C
• Low DC resistance characteristic for efficient power transmission

Common Mode Chokes Applications

• DC/DC Power Supplies
• Signal Line Filtering
• Common Mode Noise Suppression

Common Mode Chokes Procurement Notes

Verify the specific suffix 'E3' indicates lead-free compliance when reviewing official datasheets. Confirm that the 1812 package dimensions align with the target PCB footprint constraints. Ensure the 120 Ohm impedance specification meets the noise suppression requirements for the intended application frequency. Check manufacturer documentation for any RoHS directive updates or material declarations relevant to current production batches.

Common Mode Chokes Selection Notes

Select this component when space constraints require an 1812 footprint but higher thermal endurance than standard 0805 or 1206 packages is necessary. The unshielded design may influence placement relative to sensitive components due to potential magnetic field exposure. Evaluate the 50 mOhms DC resistance against voltage drop limitations in the circuit path. Consider the 25% impedance tolerance for worst-case noise attenuation scenarios.

Common Mode Chokes Part Context

This part belongs to the Vishay Dale ICM series of common mode chokes, which offers various impedance values and package sizes including 0603, 0805, 1206, and 1812. The ICM-1812 variant specifically targets applications requiring robust performance in limited board areas while maintaining high-temperature reliability. It serves as a passive electromagnetic interference suppression element in modern electronic assemblies.

Common Mode Chokes Replacement Considerations

Cross-reference with other Vishay ICM1812ER variants for different impedance levels if filtering characteristics need adjustment. Verify mechanical compatibility with existing footprints before substituting with components from other manufacturers.