PMH0805-400

Overview

The PMH0805-400 is a surface-mount ferrite bead from the Bourns PMH series, designed for electromagnetic interference (EMI) suppression in high-frequency circuits. It features a single-line configuration within an 0805 package. The component exhibits an impedance of 40 Ohms at 100 MHz and supports a maximum current rating of 2.5 Amperes. Its direct current resistance (DCR) is limited to a maximum of 30 milliohms. The device operates reliably across a temperature range of -55°C to +125°C.

Feature Summary

• Provides effective EMI noise filtering for signal integrity in high-frequency applications
• Supports high current loads up to 2.5A with minimal DC resistance
• Designed for compact surface-mount integration in space-constrained PCB layouts

Applications

• Power supply output filtering
• High-speed data line protection
• Clock signal noise suppression

Procurement Notes

Verify the specific suffix codes against official Bourns documentation to ensure correct impedance and tolerance specifications. Confirm RoHS compliance status and lead-free requirements prior to ordering. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and avoid counterfeit components during procurement.

Selection Notes

Select this component when a 40 Ohm impedance at 100 MHz is required for EMI suppression. Ensure the circuit current does not exceed the 2.5A rating to prevent thermal issues. Consider the 0805 footprint dimensions for PCB layout compatibility. Verify that the operating temperature range meets the environmental conditions of the final application.

Part Context

This ferrite bead belongs to the PMH series of passive components manufactured by Bourns Inc. The series offers various impedance values and current ratings in standard surface-mount packages. These components are engineered for general-purpose EMI suppression in consumer electronics, industrial equipment, and telecommunications infrastructure where reliable noise filtering is critical.

Replacement Considerations

Consult official Bourns substitution guides or equivalent manufacturer datasheets for compatible alternatives. Verify that any substitute matches the 40 Ohm impedance at 100 MHz, 2.5A current rating, and 0805 package dimensions. Ensure thermal and electrical characteristics align with the original design requirements.