Z0805C101ASMST Equivalent & Substitute Parts

Part Overview

The Z0805C101ASMST is a ferrite bead signal line filter manufactured by KEMET in the 0805 (2012 Metric) surface mount package. This component provides 100 Ohms of impedance at 100 MHz with a maximum current rating of 900mA and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent components that maintain functional and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

Z0805C101ASMST

KEMETIn Stock: 905Z0805C101ASMST Datasheet

Current PartRFQ

74279207

Würth ElektronikIn Stock: 1559374279207 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Z0805C101ASMST is determined by the following critical parameters:

Electrical Compatibility: The substitute part must provide 100 Ohms impedance at 100 MHz as a signal line ferrite bead with a single line configuration. The operating temperature range must encompass -55°C to 125°C.

Mechanical Compatibility: The substitute must use the 0805 (2012 Metric) package in surface mount configuration to ensure PCB footprint compatibility without design modification.

Regulatory Compliance: The substitute must maintain ROHS3 compliance and MSL 1 rating to satisfy environmental and handling requirements.

Current Handling: While the original part specifies 900mA maximum current, substitute parts with equal or higher current ratings are functionally compatible.

DC Resistance: Substitute parts with DC resistance values at or below the original specification maintain equivalent performance characteristics.

The Würth Elektronik 74279207 meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The Z0805C101ASMST is classified as obsolete. The Würth Elektronik 74279207 is an active product that provides direct functional and mechanical substitution.

Compliance Status: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production continuity.

Product Availability: The substitute part (74279207) is currently in active production with substantial inventory availability (15,555 pieces), ensuring supply chain continuity compared to the obsolete original part (812 pieces remaining).

Electrical Performance: The substitute part exceeds the original specification in current rating (1A versus 900mA) and maintains equivalent impedance characteristics. The DC resistance differential (150mOhm versus 100mOhm) remains within acceptable tolerance for signal line ferrite bead applications.

Physical Dimensions: Both components occupy identical PCB footprints with negligible height variation (1.10mm versus 1.05mm maximum), permitting direct board-level substitution without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 74279207 replace the KEMET Z0805C101ASMST in existing designs?

A: Yes. Both components share identical impedance specifications (100 Ohms @ 100 MHz), package geometry (0805 2012 Metric), and operating temperature range (-55°C to 125°C). The substitute part provides higher current capacity (1A versus 900mA) and maintains equivalent signal line filtering performance.

Q: What is the significance of the DC resistance difference between the two parts?

A: The original part specifies 100mOhm maximum DC resistance, while the substitute specifies 150mOhm maximum. This 50mOhm differential represents acceptable variation within ferrite bead manufacturing tolerances and does not compromise signal integrity in single-line filtering applications.

Q: Are there packaging differences between these components?

A: The original part is supplied in Cut Tape (CT) & Digi-Reel® packaging, while the substitute is supplied in Tape & Reel (TR) format. Both formats are standard surface mount packaging suitable for automated assembly. Reel format typically offers improved handling for high-volume production environments.

Q: Do both parts meet the same environmental and regulatory standards?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory compliance is equivalent across both parts.

Q: What is the primary reason for substitution?

A: The original KEMET Z0805C101ASMST is classified as obsolete. The Würth Elektronik 74279207 is an active product with equivalent electrical and mechanical specifications, ensuring design continuity and supply chain reliability.