MMZ2012Y202BTD25 Equivalent & Substitute Parts

Part Overview

The MMZ2012Y202BTD25 is a 2 kOhms ferrite bead designed for single-line signal filtering in 0805 (2012 Metric) surface mount packages. Manufactured by TDK Corporation, this component operates across -55°C to 125°C and supports up to 400mA current. The part carries Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or design revisions.

Substiute Parts

MMZ2012Y202BTD25

TDK CorporationIn Stock: 8324MMZ2012Y202BTD25 Datasheet

Current PartRFQ

MMZ1608A222BTD25

TDK CorporationIn Stock: 36668MMZ1608A222BTD25 Datasheet

MFR RecommendedRFQ

782851212

Würth ElektronikIn Stock: 16471782851212 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMZ2012Y202BTD25 is determined by the following critical parameters:

Primary Substitution Criteria:

• Impedance @ 100 MHz: 2 kOhms (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Filter Type: Signal Line, 1 Line (exact match required)
• Current Rating: ≥ 400mA
• DC Resistance: ≤ 500mOhm
• Operating Temperature Range: -55°C ~ 125°C (minimum)
• AEC-Q200 Compliance: Required

Substitute Categories:

Category 1: Parametric Equivalent (Direct Replacement) Part 782851212 (Würth Elektronik WE-CBA series) matches all critical parameters including impedance, package, current rating, and temperature range. DC resistance is improved (420mOhm vs. 500mOhm maximum).

Category 2: MFR Recommended Alternative (Functional Substitute) Part MMZ1608A222BTD25 (TDK Corporation) provides equivalent impedance (2.2 kOhms @ 100 MHz) in a smaller 0603 (1608 Metric) package. This substitute requires design layout modification and operates at reduced current capacity (200mA vs. 400mA).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Design Changes): Select 782851212 (Würth Elektronik WE-CBA series). This part maintains identical package dimensions, impedance, and current rating specifications. The improved DC resistance (420mOhm) provides additional margin. Active product status ensures ongoing availability. AEC-Q200 certification and RoHS3 compliance match the original specification.

For Space-Constrained Designs (Layout Modification Required): Select MMZ1608A222BTD25 (TDK Corporation) only if circuit design permits package downsizing to 0603 (1608 Metric). This option requires verification that maximum circuit current does not exceed 200mA and that the 2.2 kOhms impedance (vs. 2 kOhms) is acceptable for the application. Active product status and full compliance certifications are maintained.

Frequently Asked Questions (FAQ)

Q: Can MMZ1608A222BTD25 be used as a direct drop-in replacement? A: No. MMZ1608A222BTD25 requires PCB layout modification due to package size change from 0805 to 0603. Additionally, current rating is reduced from 400mA to 200mA, and impedance increases from 2 kOhms to 2.2 kOhms. Electrical circuit analysis is required before substitution.

Q: Is 782851212 a true equivalent to MMZ2012Y202BTD25? A: Yes. 782851212 maintains identical impedance (2 kOhms @ 100 MHz), package (0805/2012 Metric), current rating (400mA), and operating temperature range (-55°C ~ 125°C). DC resistance is improved (420mOhm vs. 500mOhm maximum). No design changes are required.

Q: What is the significance of Last Time Buy status for MMZ2012Y202BTD25? A: Last Time Buy indicates the manufacturer has discontinued production. Existing inventory may be available but will not be replenished. Designs should transition to active alternatives (782851212 or MMZ1608A222BTD25) for long-term supply security.

Q: Are all substitute parts AEC-Q200 certified? A: Yes. Both 782851212 and MMZ1608A222BTD25 carry AEC-Q200 certification, matching the original part specification.

Q: What is the primary difference between the two substitutes? A: 782851212 is a parametric equivalent requiring no design changes. MMZ1608A222BTD25 is a functional alternative that requires PCB layout modification and operates at reduced current capacity with slightly higher impedance.