Z0805C241BSMST Ferrite Bead Equivalent & Substitute Parts

Part Overview

The Z0805C241BSMST is a 240 Ohm ferrite bead manufactured by KEMET, designed for single-line signal filtering in 0805 (2012 Metric) surface mount applications. This component operates at 100 MHz impedance with a maximum current rating of 600mA and DC resistance of 200mOhm. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

Z0805C241BSMST

KEMETIn Stock: 4569Z0805C241BSMST Datasheet

Current PartRFQ

Z0805C241ASMST

KEMETIn Stock: 3744Z0805C241ASMST Datasheet

Parametric EquivalentRFQ

ACML-0805-221-T

Abracon LLCIn Stock: 5183ACML-0805-221-T Datasheet

Parametric EquivalentRFQ

BBGK00201209221Y00

Pulse ElectronicsIn Stock: 773BBGK00201209221Y00 Datasheet

Parametric EquivalentRFQ

BLM21AG221SN1D

Murata ElectronicsIn Stock: 5144BLM21AG221SN1D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Z0805C241BSMST ferrite bead is determined by the following critical parameters:

Mandatory Matching Parameters:

• Package / Case: 0805 (2012 Metric)
• Number of Lines: 1 (single signal line)
• Operating Temperature Range: -55°C ~ 125°C
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Functional Parameters (with allowable variance):

• Impedance @ Frequency: 240 Ohms @ 100 MHz (220-240 Ohms acceptable within ferrite bead tolerance specifications)
• Current Rating (Max): 600mA minimum (higher ratings acceptable)
• DC Resistance (DCR) (Max): 200mOhm maximum (lower values acceptable)

The substitute parts listed maintain identical package dimensions, thermal operating range, and compliance certifications. Impedance values of 220 Ohms at 100 MHz represent acceptable functional equivalents within standard ferrite bead performance tolerances. Current ratings and DC resistance values equal to or exceeding the original specification provide compatible alternatives.

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalent: Z0805C241ASMST (KEMET) provides identical electrical specifications and package configuration to the Z0805C241BSMST. Both components share the same base product number (Z0805C) and series designation (Z-SMS). This part maintains 240 Ohms impedance at 100 MHz with 600mA current rating and 200mOhm maximum DC resistance. However, both KEMET variants are classified as obsolete products.

Active Product Alternatives: For applications requiring active product status and long-term availability, three alternatives meet all mandatory substitution criteria:

ACML-0805-221-T (Abracon LLC) maintains identical current rating and DC resistance specifications with 220 Ohms impedance at 100 MHz. This part is actively manufactured and available in Tape & Reel packaging.

BBGK00201209221Y00 (Pulse Electronics) provides enhanced current rating of 750mA and reduced DC resistance of 180mOhm, with 220 Ohms impedance at 100 MHz. This part is actively manufactured.

BLM21AG221SN1D (Murata Electronics, EMIFIL® series) offers the highest current rating of 800mA and lowest DC resistance of 130mOhm, with 220 Ohms impedance at 100 MHz. This part is actively manufactured and represents the most robust electrical performance among available substitutes.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature range (-55°C ~ 125°C). All components are available in 0805 (2012 Metric) surface mount package configuration.

Frequently Asked Questions (FAQ)

Q: Can Z0805C241ASMST be used as a direct replacement for Z0805C241BSMST?

A: Yes. Z0805C241ASMST is a parametric equivalent with identical impedance (240 Ohms @ 100 MHz), current rating (600mA), DC resistance (200mOhm), and package configuration (0805 2012 Metric). Both parts share the same base product number and series designation. However, both are classified as obsolete.

Q: What is the difference between 240 Ohms and 220 Ohms impedance at 100 MHz?

A: The 220 Ohm variants (ACML-0805-221-T, BBGK00201209221Y00, BLM21AG221SN1D) represent an 8.3% impedance reduction compared to the original 240 Ohm specification. This variance falls within standard ferrite bead manufacturing tolerances and is functionally acceptable for signal line filtering applications.

Q: Are all substitute parts available in the same package size?

A: Yes. All listed substitute parts are manufactured in 0805 (2012 Metric) surface mount package with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm). Height specifications range from 1.05mm to 1.10mm, which is compatible with standard PCB assembly processes.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape (CT) packaging provides individual component strips suitable for manual assembly or small-volume applications. Tape & Reel (TR) packaging provides continuous reel format optimized for automated pick-and-place assembly equipment. Both packaging formats contain identical components; packaging selection depends on assembly methodology and volume requirements.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts (Z0805C241ASMST, ACML-0805-221-T, BBGK00201209221Y00, BLM21AG221SN1D) are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating. All parts operate across the identical temperature range of -55°C ~ 125°C.

Q: Which substitute part offers the best electrical performance?

A: BLM21AG221SN1D (Murata Electronics) provides the highest current rating (800mA) and lowest DC resistance (130mOhm) among available substitutes. This part is actively manufactured and represents enhanced electrical specifications compared to the original Z0805C241BSMST.

Q: Can I use a substitute part with higher current rating than the original specification?

A: Yes. Substitute parts with current ratings equal to or exceeding the original 600mA specification are compatible. Higher current ratings indicate the component can safely handle the original application current without exceeding thermal or electrical limits. BBGK00201209221Y00 (750mA) and BLM21AG221SN1D (800mA) both exceed the original specification and are suitable for this application.

Q: What does MSL Level 1 mean for ferrite beads?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. The component does not require special storage conditions, desiccant packaging, or bake-out procedures prior to assembly. This classification applies to all listed parts.