Manufacturer: Murata Manufacturing

Key Specifications

• Package: 0402 (1005 metric)
• Impedance@100MHz: 330Ω
• Tolerance: ±25%
• Rated Current: 200mA
• DC Resistance: 1.1Ω max
• Operating Temperature: -55°C to +125°C
• Application: Signal line

The BLM15EX331SN1D from Murata Manufacturing is a compact chip ferrite bead designed for effective EMI suppression in signal lines. Housed in a standard 0402 (1005 metric) package, this component offers a nominal impedance of 330Ω at 100MHz, making it suitable for filtering high-frequency noise in various electronic circuits.

Key Features

• Package size: 0402 (1005 metric) for space-constrained designs
• Impedance at 100MHz: 330Ω (typical), with ±25% tolerance
• Rated current: 200mA, suitable for low-power signal lines
• DC resistance: 1.1Ω maximum, minimizing signal attenuation
• Operating temperature range: -55°C to +125°C, ensuring reliability in harsh environments
• RoHS compliant and halogen-free

Applications

• EMI filtering in digital signal lines (e.g., I2C, SPI, UART)
• Noise suppression in portable electronic devices
• Filtering in audio and video interfaces
• General-purpose signal line filtering in consumer electronics

Selection Guidance

When selecting the BLM15EX331SN1D, consider the impedance value at the target frequency and the rated current to ensure compatibility with your circuit's operating conditions. The 330Ω impedance at 100MHz is effective for suppressing noise in the 100MHz range; for other frequencies, verify performance using the impedance-frequency curve. The 200mA rated current is adequate for typical signal lines, but for higher current paths, alternative Murata ferrite beads with higher current ratings should be considered. Always confirm the DC resistance impact on your signal integrity, especially in low-voltage applications.