B82111EC25 – EPCOS

Overview

The EPCOS B82111EC25 is a high-performance VHF choke designed for demanding RF applications. Its primary function is to block unwanted high-frequency currents while allowing DC or low-frequency signals to pass, crucial for signal integrity in sensitive circuits. A key design consideration for inductors of this magnitude is the trade-off between inductance value and self-resonant frequency (SRF); achieving 100 µH at a reasonable SRF of 55 MHz necessitates careful winding and core material selection, as higher inductance often correlates with lower SRF due to increased parasitic capacitance.

Key Features

• Inductance: 100 µH
• Tolerance: ±20%
• Maximum DC Current: 1 A
• Maximum DC Resistance: 650 mOhms
• Operating Temperature Range: -55°C to +125°C
• Dimensions: 6.5 mm (Diameter) x 26 mm (Length)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• RF output filtering in broadcast transmitters
• Impedance matching networks in high-frequency amplifiers
• DC current blocking in power supply filtering stages
• Noise suppression in sensitive analog signal paths