The B2137T is a common mode choke manufactured by Pulse Electronics. Common mode chokes are used to suppress common-mode noise in electronic circuits. These chokes are particularly useful in applications where noise from power lines or other sources can interfere with the operation of sensitive circuits.

Applications:

• Power Line Filtering
• Signal Line Noise Reduction
• USB Ports
• Ethernet Ports
• Audio Circuits

Features:

• High Common Mode Impedance: Provides significant attenuation of common mode noise.
• Low Differential Mode Impedance: Minimizes signal distortion.
• Compact Design: Suitable for space-constrained applications.
• High Current Capacity: Capable of handling significant current levels.
• Wide Frequency Range: Effective over a broad spectrum of frequencies.

Benefits:

• Improved Signal Integrity: Reduces noise and interference for clearer signals.
• Enhanced System Reliability: Prevents noise from causing malfunctions.
• Compliance with EMC Standards: Helps meet electromagnetic compatibility requirements.
• Reduced Emissions: Minimizes radiated noise from electronic equipment.

Additional Details:

The B2137T is constructed with two identical windings on a common core. Common-mode noise flows through both windings in the same direction, creating a high impedance and attenuating the noise. Differential-mode signals, on the other hand, flow through the windings in opposite directions, creating a low impedance and allowing the signal to pass through relatively unattenuated. Pulse provides detailed datasheets with specifications, including impedance, current rating, and frequency characteristics.

When using the B2137T, it is essential to connect it properly in the circuit to ensure effective noise suppression. The choke should be placed as close as possible to the noise source or the sensitive circuit being protected. Proper grounding is crucial for effective common-mode noise reduction. The current rating of the choke should be selected to match the expected current level in the application. The impedance characteristics of the choke should be considered in relation to the frequency range of the noise being suppressed.