BNX029-01L

Overview

The Murata BNX029-01L is a surface-mount LC EMI filter designed for high-current applications. It features a 5th-order low-pass configuration with two channels, rated for 20 A continuous current and 6.3 V DC. The component integrates a capacitance of 100 µF within a compact 4-SMD, no-lead package measuring 12.10 mm x 9.10 mm x 3.70 mm. It provides an insertion loss of 35 dB across the 15 kHz to 1 GHz frequency range, ensuring effective noise suppression in demanding electronic environments.

Feature Summary

• Integrates LC pi-type filtering architecture into a single surface-mount component
• Supports high current loads up to 20 Amperes for power line applications
• Provides wideband attenuation from 15 kHz to 1 GHz
• Designed for space-constrained mobile device data lines

Applications

• DC power line noise suppression for medical equipment
• EMI filtering for DC-DC converter inputs
• Data line protection in mobile devices
• Conducted noise mitigation meeting CISPR11 standards

Procurement Notes

Verify the specific suffix 'L' against the official Murata datasheet to confirm package and tape specifications. Ensure the operating temperature range of -40°C to 125°C aligns with your system requirements. Confirm RoHS3 compliance status if required by your manufacturing process. Cross-reference the 4-SMD no-lead footprint dimensions with your PCB layout to ensure mechanical fit.

Selection Notes

Select this component when high current handling (20 A) and broad frequency attenuation are required in a small form factor. The integrated LC pi-network reduces component count compared to discrete solutions. Consider the 6.3 V rating limit for voltage headroom. The 100 µF capacitance value is critical for low-frequency noise filtering performance in power delivery networks.

Part Context

This part belongs to the Murata EMIFIL BNX series, which specializes in block-type SMD EMI filters. The series is engineered to replace multiple discrete components with a single unit, simplifying assembly and saving board space. These filters are commonly used in industrial and medical applications where strict electromagnetic compatibility standards must be met.

Replacement Considerations

Check the BNX02x-01x reference sheet for alternative pin-compatible or functionally similar parts within the same series. Verify that any substitute maintains the 20 A current rating and 100 µF capacitance to ensure equivalent noise suppression performance.