Manufacturer: Murata Manufacturing

Key Specifications

• Package: 0402 (1005 metric)
• Impedance: 120 Ω ±25% at 100 MHz
• Rated Current: 200 mA
• DC Resistance: 0.9 Ω max
• Operating Temperature: -55°C to +125°C
• Frequency Range: 1 MHz to 1 GHz
• Mounting Type: Surface Mount

Product Overview

The Murata BLM15AG121SN1D is a chip ferrite bead designed for EMI suppression in electronic circuits. It is part of the BLM15A series, which is widely used in noise filtering applications. The component is housed in a compact 0402 (1005 metric) package, making it suitable for space-constrained PCB designs. With a nominal impedance of 120 ohms at 100 MHz, it effectively attenuates high-frequency noise while allowing desired signals to pass with minimal distortion.

Key Features

• Impedance: 120 Ω ±25% at 100 MHz, providing effective noise suppression in the high-frequency range.
• Compact 0402 package ideal for miniaturized electronic devices.
• Rated current of 200 mA, suitable for low-power signal lines.
• Low DC resistance (0.9 Ω max) to minimize signal loss.
• Wide operating temperature range from -55°C to +125°C, ensuring reliability in harsh environments.
• Surface-mount configuration for automated assembly.

Applications

This ferrite bead is commonly used in mobile phones, digital cameras, portable audio devices, and other consumer electronics where EMI filtering is required. It is also applicable in power supply lines and signal lines of communication equipment, computers, and peripheral devices.

Selection Guidance

When selecting this component, consider the impedance value at the frequency of interest, the rated current of the circuit, and the available PCB space. The BLM15AG121SN1D is optimized for high-frequency noise suppression; for lower frequency applications, other impedance values may be more appropriate. Always verify the DC resistance to ensure it does not cause unacceptable voltage drops in your circuit.