Z0805C330ASMST Ferrite Bead 33 Ohm 0805 Equivalent & Substitute Parts

Part Overview

The Z0805C330ASMST is a signal line ferrite bead manufactured by KEMET in the 0805 (2012 Metric) surface mount package. This component provides 33 Ohms of impedance at 100 MHz with a maximum current rating of 1.2A and 50mOhm DC resistance. The part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. Ferrite beads in this impedance range are used for electromagnetic interference (EMI) suppression and signal line filtering in electronic circuits.

Substiute Parts

Z0805C330ASMST

KEMETIn Stock: 752Z0805C330ASMST Datasheet

Current PartRFQ

742792012

Würth ElektronikIn Stock: 17008742792012 Datasheet

SimilarRFQ

ACML-0805-310-T

Abracon LLCIn Stock: 4460ACML-0805-310-T Datasheet

Parametric EquivalentRFQ

ACML-0805-360-T

Abracon LLCIn Stock: 828ACML-0805-360-T Datasheet

Parametric EquivalentRFQ

MMZ2012R300AT000

TDK CorporationIn Stock: 69124MMZ2012R300AT000 Datasheet

Parametric EquivalentRFQ

MMZ2012Y300BT000

TDK CorporationIn Stock: 844855MMZ2012Y300BT000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of ferrite beads is determined by the following critical parameters:

Primary Matching Criteria:

• Package / Case: 0805 (2012 Metric) surface mount form factor
• Filter Type: Signal Line configuration
• Number of Lines: Single line (1LN)
• Operating Temperature Range: -55°C ~ 125°C
• Compliance: ROHS3 Compliant, REACH Unaffected

Secondary Compatibility Criteria:

• Impedance @ 100 MHz: 30–36 Ohms (±10% tolerance band around 33 Ohms)
• Current Rating: Minimum 1.2A (higher ratings provide design margin)
• DC Resistance: Maximum 50mOhm
• Mounting Type: Surface Mount

Substitute parts are grouped into two categories:

Direct Equivalent (Identical Impedance): Parts with 33 Ohms @ 100 MHz impedance matching the original specification.

Parametric Equivalent (Near-Impedance Range): Parts with impedance values between 30–36 Ohms @ 100 MHz, which fall within acceptable tolerance for signal line ferrite bead applications. These parts maintain identical package geometry, temperature range, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 742792012 (Würth Elektronik)

The 742792012 is the optimal substitute for the Z0805C330ASMST. This part maintains identical impedance (33 Ohms @ 100 MHz) and package geometry (0805 / 2012 Metric). The Würth Elektronik component offers superior electrical performance with 4A current rating and 8mOhm DC resistance, providing enhanced design margin. Product status is Active, ensuring long-term availability and supply chain stability. All compliance certifications (ROHS3, REACH Unaffected) are maintained.

Secondary Substitutes: ACML-0805-310-T and ACML-0805-360-T (Abracon LLC)

These Abracon components provide parametric equivalence with impedance values of 31 Ohms and 36 Ohms respectively, both within the acceptable tolerance band for signal line ferrite bead applications. Both parts maintain 0805 package geometry, 1.5A current rating, 50mOhm DC resistance, and full compliance certifications. Product status is Active. These substitutes are suitable for applications where impedance tolerance of ±10% is acceptable.

Tertiary Substitutes: MMZ2012R300AT000 and MMZ2012Y300BT000 (TDK Corporation)

Both TDK MMZ series parts provide 30 Ohms impedance at 100 MHz with 1.5A current rating and 50mOhm DC resistance in 0805 package configuration. These components are classified as Last Time Buy, indicating limited future availability. MMZ2012Y300BT000 offers significantly higher inventory (844800 Pcs) compared to MMZ2012R300AT000 (69100 Pcs). Both maintain full compliance certifications. These substitutes are suitable for applications where impedance tolerance of ±10% is acceptable and where Last Time Buy status does not conflict with procurement strategy.

Frequently Asked Questions (FAQ)

Q: Can the 742792012 be used as a direct replacement for the Z0805C330ASMST?

A: Yes. The 742792012 maintains identical impedance (33 Ohms @ 100 MHz), package geometry (0805 / 2012 Metric), operating temperature range (-55°C ~ 125°C), and compliance certifications. The Würth Elektronik part offers improved electrical performance with higher current rating (4A vs. 1.2A) and lower DC resistance (8mOhm vs. 50mOhm).

Q: What is the impedance tolerance for the parametric equivalent parts?

A: The ACML-0805-310-T (31 Ohms), ACML-0805-360-T (36 Ohms), and TDK MMZ series parts (30 Ohms) represent impedance values within ±10% of the original 33 Ohm specification. These parts are suitable for applications where this impedance tolerance is acceptable for signal line filtering and EMI suppression.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are available in 0805 (2012 Metric) surface mount package. However, packaging format differs: the 742792012 is supplied in Cut Tape (CT) & Digi-Reel format, while ACML parts are supplied in Tape & Reel (TR) format, and TDK MMZ parts are supplied in Cut Tape (CT) format. Verify packaging compatibility with your procurement and assembly processes.

Q: What is the difference between the two TDK MMZ parts?

A: Both MMZ2012R300AT000 and MMZ2012Y300BT000 provide identical electrical specifications (30 Ohms @ 100 MHz, 1.5A, 50mOhm). The primary difference is inventory availability: MMZ2012Y300BT000 has significantly higher stock (844800 Pcs vs. 69100 Pcs). Both are classified as Last Time Buy.

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

A: Yes. All substitute parts listed have current ratings equal to or greater than the original 1.2A specification. Higher current ratings provide additional design margin and do not negatively impact circuit performance in signal line ferrite bead applications.

Q: Are all parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 Compliant status and REACH Unaffected classification, matching the environmental compliance of the original Z0805C330ASMST.

Q: What should I consider when selecting between the substitute options?

A: Selection should be based on: (1) Product Status—the 742792012 (Active) and Abracon parts (Active) offer superior long-term availability compared to TDK parts (Last Time Buy); (2) Impedance Match—742792012 provides exact 33 Ohm match, while others provide ±10% tolerance; (3) Electrical Performance—742792012 offers lowest DC resistance (8mOhm); (4) Packaging Format—verify compatibility with your assembly process; (5) Inventory—confirm availability meets your procurement timeline.