MMZ2012S800AT000 Equivalent & Substitute Parts

Part Overview

The MMZ2012S800AT000 is a 0805 (2012 Metric) surface mount ferrite bead manufactured by TDK Corporation, rated for 80 Ohms impedance at 100 MHz with a maximum current rating of 800mA and 100mOhm DC resistance. This component is classified as a signal line ferrite bead with operating temperature range of -55°C to 125°C and is ROHS3 compliant with MSL 1 (Unlimited).

The part is currently in Last Time Buy status. Equivalent and substitute parts are available from multiple manufacturers including TDK Corporation, Bourns Inc., Murata Electronics, and Eaton - Electronics Division, offering alternative configurations with varying electrical characteristics and current ratings.

Substiute Parts

MMZ2012S800AT000

TDK CorporationIn Stock: 2618MMZ2012S800AT000 Datasheet

Current PartRFQ

MMZ1608S800ATA00

TDK CorporationIn Stock: 17134MMZ1608S800ATA00 Datasheet

MFR RecommendedRFQ

MH2029-800Y

Bourns Inc.In Stock: 90040MH2029-800Y Datasheet

DirectRFQ

BLM21PG600SN1D

Murata ElectronicsIn Stock: 205445BLM21PG600SN1D Datasheet

MFR RecommendedRFQ

MFBW1V2012-800-R

Eaton - Electronics DivisionIn Stock: 794MFBW1V2012-800-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMZ2012S800AT000 is determined by the following critical parameters:

Primary Matching Criteria:

• Impedance @ 100 MHz: 80 Ohms (exact match required for signal integrity)
• Package / Case: 0805 (2012 Metric) (physical compatibility with PCB layout)
• Number of Lines: 1 (functional equivalence)
• Mounting Type: Surface Mount (assembly process compatibility)

Secondary Compatibility Parameters:

• Current Rating (Max): Substitute must meet or exceed 800mA requirement
• DC Resistance (DCR): Lower values preferred to minimize signal loss
• Operating Temperature Range: Must encompass -55°C ~ 125°C or be suitable for intended application
• RoHS Status: ROHS3 Compliant (regulatory requirement)

Substitute parts are grouped by their adherence to these parameters. Parts with identical impedance and package specifications but different current ratings or DCR values are considered direct substitutes with noted trade-offs in thermal performance and power dissipation characteristics.

Parameter Comparison

Engineering Selection Recommendations

MMZ1608S800ATA00 (TDK Corporation): This part maintains identical impedance and operating temperature specifications as the main part but uses a smaller 0603 (1608 Metric) package. The current rating of 500mA is lower than the original 800mA specification. This substitute is suitable only for applications where the reduced current capacity does not exceed circuit requirements. The higher DCR of 150mOhm compared to 100mOhm should be evaluated for signal loss impact. Product status is Active with full ROHS3 compliance.

MH2029-800Y (Bourns Inc.): This part matches the 0805 package and 80 Ohm impedance specification with significantly higher current rating of 3A and lower DCR of 40mOhm. The filter type designation includes both Power and Signal Line capability. Operating temperature range matches the original specification. Product status is Active with ROHS3 compliance. This substitute offers improved thermal performance and current handling capacity.

BLM21PG600SN1D (Murata Electronics): This part uses the same 0805 package but specifies 60 Ohms impedance instead of 80 Ohms, representing a 25% deviation from the original specification. Current rating is 4.6A with the lowest DCR of 20mOhm. Filter type is designated as Power Line. Operating temperature range matches the original. Product status is Active with ROHS3 compliance. This substitute is applicable only where the impedance deviation is acceptable for the circuit design.

MFBW1V2012-800-R (Eaton - Electronics Division): This part maintains the 0805 package and 80 Ohm impedance with current rating of 2.5A and DCR of 80mOhm. Operating temperature range is -40°C ~ 85°C, which does not extend to the full -55°C lower limit of the original specification. Product status is Active with ROHS3 compliance. This substitute is suitable for applications within the reduced temperature range.

Frequently Asked Questions (FAQ)

Q: Can MMZ1608S800ATA00 be used as a direct replacement for MMZ2012S800AT000?

A: MMZ1608S800ATA00 maintains the same impedance (80 Ohms @ 100 MHz) and operating temperature range (-55°C ~ 125°C), but uses a smaller 0603 package instead of 0805. The current rating is reduced from 800mA to 500mA. Substitution is valid only if circuit current requirements do not exceed 500mA and PCB layout accommodates the smaller package footprint.

Q: What is the significance of the impedance specification in ferrite bead selection?

A: Impedance at 100 MHz determines the filtering effectiveness and signal attenuation characteristics. The MMZ2012S800AT000 specifies 80 Ohms @ 100 MHz. Substitutes must maintain this impedance value for equivalent signal filtering performance. BLM21PG600SN1D specifies 60 Ohms, which represents a 25% reduction and may alter circuit behavior.

Q: How does DC Resistance (DCR) affect substitute part selection?

A: DCR represents resistive losses in the ferrite bead. Lower DCR values reduce signal loss and heat generation. The original part specifies 100mOhm maximum. Substitutes with lower DCR (MH2029-800Y at 40mOhm, BLM21PG600SN1D at 20mOhm) provide improved performance. Substitutes with higher DCR (MMZ1608S800ATA00 at 150mOhm) may increase signal loss.

Q: Are all substitute parts compatible with the same PCB layout?

A: No. MMZ1608S800ATA00 uses 0603 (1608 Metric) package, which is physically smaller than the original 0805 (2012 Metric) package. All other substitutes use the same 0805 package and are physically compatible with the original PCB layout. Package change requires PCB redesign.

Q: What is the impact of operating temperature range differences?

A: The original MMZ2012S800AT000 operates from -55°C to 125°C. MFBW1V2012-800-R operates from -40°C to 85°C, which does not extend to the full lower temperature limit. Substitution is valid only if the application does not require operation below -40°C or above 85°C.

Q: How does current rating affect substitute part selection?

A: The original part is rated for 800mA maximum current. MMZ1608S800ATA00 is rated for 500mA, which is insufficient for circuits requiring the full 800mA capacity. MH2029-800Y (3A), BLM21PG600SN1D (4.6A), and MFBW1V2012-800-R (2.5A) all exceed the original current requirement and are suitable for higher current applications.