MMZ2012S400AT000 Equivalent & Substitute Parts

Part Overview

The MMZ2012S400AT000 is a 40 Ohm ferrite bead manufactured by TDK Corporation, designed for single-line signal filtering in 0805 (2012 Metric) surface mount packages. This component operates across a temperature range of -55°C to 125°C with a maximum current rating of 1A and DC resistance of 100mOhm. The part is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring 40 Ohm impedance ferrite beads at 100 MHz.

Substiute Parts

MMZ2012S400AT000

TDK CorporationIn Stock: 5165MMZ2012S400AT000 Datasheet

Current PartRFQ

MMZ1608S400ATA00

TDK CorporationIn Stock: 61591MMZ1608S400ATA00 Datasheet

MFR RecommendedRFQ

MH2029-400Y

Bourns Inc.In Stock: 20883MH2029-400Y Datasheet

DirectRFQ

MFBW1V2012-360-R

Eaton - Electronics DivisionIn Stock: 779MFBW1V2012-360-R Datasheet

MFR RecommendedRFQ

ACML-0805-360-T

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMZ2012S400AT000 is determined by the following critical parameters:

Primary Matching Criteria:

• Impedance @ 100 MHz: 40 Ohms (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required for PCB compatibility)
• Number of Lines: 1 (single signal line configuration)
• Mounting Type: Surface Mount

Secondary Compatibility Parameters:

• Current Rating: Must equal or exceed 1A
• DC Resistance: Must not exceed 100mOhm
• Operating Temperature: Must encompass -55°C ~ 125°C range
• RoHS Compliance: ROHS3 Compliant

Substitute parts meeting these criteria are grouped by their relationship to the main part: MFR Recommended substitutes (manufacturer-endorsed alternatives), Direct equivalents (identical electrical and mechanical specifications), and Parametric equivalents (functionally compatible with minor parameter variations).

Parameter Comparison

Engineering Selection Recommendations

MMZ1608S400ATA00 (TDK Corporation): This MFR Recommended substitute maintains exact impedance matching at 40 Ohms @ 100 MHz and identical DC resistance of 100mOhm. However, the package transitions from 0805 to 0603 (1608 Metric), requiring PCB layout modification. Current rating reduces to 600mA, suitable only for applications with maximum current draw below 600mA. Product status is Active with full ROHS3 compliance and unlimited moisture sensitivity rating.

MH2029-400Y (Bourns Inc.): This Direct equivalent maintains the 0805 package footprint and 40 Ohm impedance specification. Current rating increases to 5A with significantly reduced DC resistance of 20mOhm, providing superior performance margin. Operating temperature range remains -55°C ~ 125°C. Product status is Active with ROHS3 compliance. This substitute is suitable for designs requiring higher current capacity without PCB redesign.

MFBW1V2012-360-R (Eaton - Electronics Division): This MFR Recommended substitute retains the 0805 package and supports 3A current rating with 60mOhm DC resistance. Impedance is 36 Ohms @ 100 MHz, representing a 10% deviation from the 40 Ohm specification. Operating temperature range is -40°C ~ 85°C, which does not encompass the full -55°C lower limit of the original part. Product status is Active with ROHS3 compliance.

ACML-0805-360-T (Abracon LLC): This Parametric equivalent maintains the 0805 package and -55°C ~ 125°C operating temperature range. Impedance is 36 Ohms @ 100 MHz with 50mOhm DC resistance. Current rating is 1.5A, exceeding the original 1A specification. Product status is Active with ROHS3 compliance and unlimited moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can MMZ1608S400ATA00 be used as a direct replacement for MMZ2012S400AT000?

A: MMZ1608S400ATA00 matches the electrical specifications (40 Ohms @ 100 MHz, 100mOhm DCR) but requires PCB layout modification due to package size change from 0805 to 0603. Additionally, the current rating reduces from 1A to 600mA, limiting applicability to lower-current signal lines.

Q: What is the primary advantage of MH2029-400Y over the original part?

A: MH2029-400Y maintains identical package footprint (0805) and impedance (40 Ohms @ 100 MHz) while providing superior electrical performance through 5A current rating and 20mOhm DC resistance. No PCB redesign is required.

Q: Why do MFBW1V2012-360-R and ACML-0805-360-T have 36 Ohm impedance instead of 40 Ohms?

A: These parts are parametric equivalents with impedance deviation of 10% from the original specification. They maintain the 0805 package and provide acceptable filtering performance for applications where exact impedance matching is not critical. Verify circuit requirements before selection.

Q: Is MFBW1V2012-360-R suitable for applications requiring -55°C operation?

A: No. MFBW1V2012-360-R operating temperature range is -40°C ~ 85°C, which does not include the -55°C lower limit of the original MMZ2012S400AT000. This substitute is unsuitable for applications requiring full temperature range coverage.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (MMZ1608S400ATA00, MH2029-400Y, MFBW1V2012-360-R, ACML-0805-360-T) are ROHS3 compliant and REACH unaffected, matching the compliance status of the original part.

Q: Which substitute provides the best direct replacement without design changes?

A: MH2029-400Y is the optimal direct replacement, maintaining the 0805 package footprint, 40 Ohm impedance, and -55°C ~ 125°C operating temperature range while offering enhanced current capacity and reduced DC resistance.