MEM2012W121R LC (Pi) EMI Filter Equivalent & Substitute Parts

Part Overview

The MEM2012W121R is a 5th order LC (Pi) EMI filter manufactured by TDK Corporation, designed for single-channel low-pass filtering applications in data line protection for mobile devices. This component operates at a 120 MHz cutoff frequency with a rated current capacity of 100 mA and is housed in a compact 0805 (2012 Metric) surface mount package.

The MEM2012W121R carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

MEM2012W121R

TDK CorporationIn Stock: 4383MEM2012W121R Datasheet

Current PartRFQ

MEM2012V121RT001

TDK CorporationIn Stock: 7709MEM2012V121RT001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MEM2012W121R is determined by strict alignment with the following critical parameters:

• Filter technology and order: LC (Pi), 5th order
• Cutoff frequency: 120 MHz
• Single-channel configuration
• Current rating: 100 mA minimum
• Voltage rating: 10 V minimum
• Package form factor: 0805 (2012 Metric), 3 PC Pad
• Surface mount mounting type
• Operating temperature range: -40°C ~ 85°C minimum coverage

The MEM2012V121RT001 qualifies as a direct substitute based on identical electrical specifications, package dimensions, and functional parameters. The primary distinction is product status (active vs. obsolete) and packaging format (tape & reel vs. bulk).

Parameter Comparison

Engineering Selection Recommendations

The MEM2012V121RT001 is the direct substitute for the obsolete MEM2012W121R. Selection of this substitute is supported by the following factors:

• Identical electrical and mechanical specifications across all critical parameters
• Active product status ensures ongoing availability and supply chain support
• ROHS3 compliance certification provides regulatory alignment for current manufacturing standards
• Equivalent attenuation performance (20 dB @ 200 MHz ~ 2 GHz) maintains signal integrity requirements
• Identical package footprint and mounting characteristics enable direct PCB layout compatibility without redesign

The primary operational difference is packaging format: the substitute is supplied in tape & reel (TR) format, which is standard for production environments. Bulk packaging availability should be confirmed with the distributor if required for specific procurement workflows.

Frequently Asked Questions (FAQ)

Q: Can the MEM2012V121RT001 be used as a direct replacement for the MEM2012W121R on existing PCBs?

A: Yes. Both components share identical package dimensions (0805 / 2012 Metric), pad configuration (3 PC Pad), and electrical specifications. No PCB layout modifications are required.

Q: What is the difference between the MEM2012W121R and MEM2012V121RT001?

A: The primary differences are product status (obsolete vs. active), packaging format (bulk vs. tape & reel), and documented attenuation performance. The MEM2012V121RT001 includes ROHS3 compliance certification and specified attenuation of 20 dB @ 200 MHz ~ 2 GHz.

Q: Are there any height differences between these components?

A: Yes. The MEM2012W121R has a height of 0.087" (2.20 mm), while the MEM2012V121RT001 has a height of 0.039" (1.00 mm). This difference must be evaluated for applications with height constraints or specific mechanical clearance requirements.

Q: Is the MEM2012V121RT001 RoHS compliant?

A: Yes. The MEM2012V121RT001 is ROHS3 compliant. RoHS status for the MEM2012W121R is not specified in available documentation.

Q: What is the attenuation performance of these filters?

A: The MEM2012V121RT001 provides 20 dB attenuation across the 200 MHz to 2 GHz frequency range. Attenuation specifications for the MEM2012W121R are not documented.

Q: Can I order the substitute in bulk packaging instead of tape & reel?

A: Packaging format availability should be confirmed directly with the component distributor or TDK Corporation. Standard production supply is in tape & reel format.