MMZ2012R301AT000 Ferrite Bead 300 Ohm 0805 Equivalent & Substitute Parts

Part Overview

The MMZ2012R301AT000 is a signal line ferrite bead manufactured by TDK Corporation, rated at 300 Ohms impedance at 100 MHz in a 0805 (2012 Metric) surface mount package. This component is designed for electromagnetic interference (EMI) suppression in signal line applications. The part carries a Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing production and maintenance requirements.

Substiute Parts

MMZ2012R301AT000

TDK CorporationIn Stock: 85172MMZ2012R301AT000 Datasheet

Current PartRFQ

MMZ1608R301ATA00

TDK CorporationIn Stock: 4344MMZ1608R301ATA00 Datasheet

MFR RecommendedRFQ

MH2029-301Y

Bourns Inc.In Stock: 12956MH2029-301Y Datasheet

DirectRFQ

MFBW1V2012-301-R

Eaton - Electronics DivisionIn Stock: 17744MFBW1V2012-301-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMZ2012R301AT000 is determined by the following critical parameters:

Primary Matching Criteria:

• Impedance @ 100 MHz: 300 Ohms (exact match required)
• Number of Lines: 1 (single signal line configuration)
• Operating Temperature Range: Must encompass or match -55°C ~ 125°C
• RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Factors:

• Package / Case: 0805 (2012 Metric) preferred for direct mechanical and electrical compatibility
• Current Rating: Minimum 600mA required for equivalent performance
• DC Resistance: Maximum 150mOhm preferred to maintain electrical characteristics
• Mounting Type: Surface Mount (fixed requirement)

The substitute parts listed below meet the primary matching criteria. Variations in package size, current rating, and DC resistance are noted to enable informed selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

MMZ1608R301ATA00 (TDK Corporation): This substitute maintains identical impedance and temperature range specifications. The 0603 (1608 Metric) package is mechanically smaller, requiring PCB layout modification. Current rating of 500mA is below the original specification; this part is suitable only for applications where circuit current does not exceed 500mA. DC resistance of 250mOhm exceeds the original specification. Product status is Active, ensuring continued availability.

MH2029-301Y (Bourns Inc.): This substitute maintains identical impedance, package size, and temperature range. Current rating of 1A exceeds the original specification, providing design margin. DC resistance of 200mOhm is slightly elevated but within acceptable tolerance for most signal line applications. Product status is Active. No PCB layout modification is required.

MFBW1V2012-301-R (Eaton - Electronics Division): This substitute maintains identical impedance and package size. Current rating of 2A significantly exceeds the original specification. DC resistance of 200mOhm is slightly elevated. Operating temperature range of -40°C ~ 85°C is narrower than the original specification; this part is not suitable for applications requiring full -55°C ~ 125°C operation. Product status is Active.

Frequently Asked Questions (FAQ)

Q: Can MMZ1608R301ATA00 be used as a direct replacement for MMZ2012R301AT000?

A: MMZ1608R301ATA00 matches the impedance and temperature specifications but uses a smaller 0603 package instead of 0805. PCB layout modification is required. Current rating is 500mA versus 600mA on the original part. Substitution is valid only for applications operating at or below 500mA.

Q: What is the primary difference between MH2029-301Y and the original MMZ2012R301AT000?

A: Both parts share identical impedance (300 Ohms @ 100 MHz), package size (0805), and temperature range (-55°C ~ 125°C). MH2029-301Y has a higher current rating (1A versus 600mA) and slightly higher DC resistance (200mOhm versus 150mOhm). No PCB modifications are required for substitution.

Q: Is MFBW1V2012-301-R suitable for all applications using MMZ2012R301AT000?

A: MFBW1V2012-301-R matches impedance and package size but has a narrower operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C). This part is not suitable for applications requiring the full temperature specification of the original part.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All substitute parts listed (MMZ1608R301ATA00, MH2029-301Y, and MFBW1V2012-301-R) are ROHS3 Compliant, matching the compliance status of the original MMZ2012R301AT000.

Q: Which substitute part requires no PCB modifications?

A: MH2029-301Y and MFBW1V2012-301-R both use the 0805 (2012 Metric) package, identical to the original part. No PCB layout modifications are required for these substitutes. MMZ1608R301ATA00 requires layout modification due to its smaller 0603 package.