Z0402C181CSMST Equivalent & Substitute Parts

Part Overview

The Z0402C181CSMST is a single-line ferrite bead manufactured by KEMET, designed for signal line filtering applications in 0402 (1005 Metric) surface mount packages. This component provides 180 Ohms of impedance at 100 MHz with a maximum current rating of 300mA and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the same package footprint and electrical specifications.

Substiute Parts

Z0402C181CSMST

KEMETIn Stock: 870Z0402C181CSMST Datasheet

Current PartRFQ

BBSY00100505151Y00

Pulse ElectronicsIn Stock: 884BBSY00100505151Y00 Datasheet

Parametric EquivalentRFQ

BBSY00100505181Y00

Pulse ElectronicsIn Stock: 1030BBSY00100505181Y00 Datasheet

Parametric EquivalentRFQ

MLB03-151-RC

Allied Components InternationalIn Stock: 879MLB03-151-RC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Z0402C181CSMST is determined by the following critical parameters:

Primary Substitution Criteria:

• Impedance value at 100 MHz (180 Ohms)
• Package type (0402 / 1005 Metric)
• Single signal line configuration
• Surface mount mounting type
• Operating temperature range compatibility (-55°C ~ 125°C)
• RoHS3 compliance

Secondary Compatibility Factors:

• Current rating must equal or exceed 300mA
• DC resistance characteristics
• Moisture sensitivity level (MSL 1)
• Physical dimensions within 0402 package constraints

The substitute part BBSY00100505181Y00 (Pulse Electronics) provides an exact impedance match at 180 Ohms @ 100 MHz with superior current handling (400mA) and lower DC resistance (400mOhm), making it a direct functional replacement. This part is currently active in production status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: BBSY00100505181Y00 (Pulse Electronics)

This substitute provides exact electrical equivalence with 180 Ohms impedance at 100 MHz, matching the original Z0402C181CSMST specification. The part is currently in active production status, ensuring long-term availability. It offers improved performance characteristics with 400mA current rating (versus 300mA original) and reduced DC resistance of 400mOhm (versus 530mOhm original). The component maintains full ROHS3 compliance, MSL 1 rating, and identical operating temperature range. The 0.002" (0.05mm) increase in maximum height remains within typical PCB assembly tolerances for 0402 packages.

Secondary Recommendation: BBSY00100505151Y00 (Pulse Electronics)

This substitute provides 150 Ohms impedance at 100 MHz, representing a 16.7% reduction from the original 180 Ohms specification. Selection of this part is appropriate only when circuit design permits lower impedance filtering. The part offers superior current handling at 400mA and reduced DC resistance at 400mOhm. Active production status and full ROHS3 compliance are maintained.

Alternative Consideration: MLB03-151-RC (Allied Components International)

This substitute also provides 150 Ohms impedance at 100 MHz with current rating matching the original specification at 300mA. DC resistance is 500mOhm. The part maintains RoHS compliance and MSL 1 rating. Selection is appropriate only when 150 Ohms impedance is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can BBSY00100505151Y00 be used as a direct replacement for Z0402C181CSMST?

A: BBSY00100505151Y00 is not a direct replacement due to impedance mismatch. The substitute provides 150 Ohms at 100 MHz versus the original 180 Ohms specification. Use this part only if circuit design analysis confirms that 150 Ohms impedance meets filtering requirements.

Q: What is the primary advantage of BBSY00100505181Y00 over the original Z0402C181CSMST?

A: BBSY00100505181Y00 provides identical impedance (180 Ohms @ 100 MHz) with improved electrical performance: 400mA current rating versus 300mA, and 400mOhm DC resistance versus 530mOhm. The part is in active production, ensuring supply continuity.

Q: Are there height differences between the original and substitute parts?

A: The original Z0402C181CSMST has a maximum height of 0.022" (0.55mm). Substitute parts BBSY00100505181Y00, BBSY00100505151Y00, and MLB03-151-RC all have maximum heights of 0.024" (0.60mm). This 0.002" (0.05mm) difference is within standard PCB assembly tolerances for 0402 packages and does not affect placement or functionality.

Q: Do all substitute parts maintain the same compliance certifications?

A: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. Operating temperature ranges are identical at -55°C to 125°C. REACH status is unaffected for Pulse Electronics parts. Allied Components International part (MLB03-151-RC) has REACH information available upon request.

Q: Which substitute should be selected for new designs?

A: For new designs requiring 180 Ohms impedance at 100 MHz, BBSY00100505181Y00 is the recommended selection. It provides exact electrical equivalence, active production status, and improved performance margins over the obsolete original part.

Q: Can MLB03-151-RC be used interchangeably with BBSY00100505151Y00?

A: Both parts provide 150 Ohms impedance at 100 MHz in 0402 packages. MLB03-151-RC has 300mA current rating and 500mOhm DC resistance, while BBSY00100505151Y00 has 400mA current rating and 400mOhm DC resistance. Selection between these parts depends on specific current and resistance requirements of the application. Both are functionally compatible for 150 Ohms filtering applications.