ACE1V2012-121-R Equivalent & Substitute Parts

Part Overview

The ACE1V2012-121-R is a 2-line common mode choke (CMC) surface mount component manufactured by Eaton - Electronics Division. This signal line filter operates at 120 Ohms impedance at 100 MHz with a maximum current rating of 370mA and DC resistance of 300mOhm. The component is rated for -40°C to 105°C operating temperature and complies with AEC-Q200 automotive qualification standards. The part is actively produced and available in cut tape packaging with 2659 units in current inventory.

Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory management, or packaging format changes while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

ACE1V2012-121-R

Eaton - Electronics DivisionIn Stock: 2707ACE1V2012-121-R Datasheet

Current PartRFQ

CTDLW21SF-121T04

Central TechnologiesIn Stock: 883CTDLW21SF-121T04 Datasheet

Parametric EquivalentRFQ

SCM20-121T-RC

Allied Components InternationalIn Stock: 892SCM20-121T-RC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ACE1V2012-121-R are qualified based on the following critical parameters that determine functional equivalence:

Electrical Parameters (Must Match or Exceed):

• Impedance: 120 Ohms @ 100 MHz
• DC Resistance (DCR): 300mOhm maximum
• Voltage Rating - DC: 50V minimum
• Operating Temperature Range: -40°C ~ 105°C minimum

Mechanical Parameters (Must Match):

• Filter Type: Signal Line
• Number of Lines: 2
• Mounting Type: Surface Mount
• Package / Case: Horizontal, 4 PC Pad

Current Rating Consideration:

• Substitute parts with current ratings equal to or greater than 370mA are acceptable for direct substitution

Compliance Parameters:

• RoHS3 compliance required
• MSL rating of 1 (Unlimited) preferred for handling consistency

The identified substitute parts meet these criteria within the specified tolerances and are actively produced by their respective manufacturers.

Parameter Comparison

Engineering Selection Recommendations

ACE1V2012-121-R (Primary Part - Eaton - Electronics Division)

This part is the original specification component with AEC-Q200 automotive qualification rating. It is actively produced with 2659 units in current inventory. The part carries ROHS3 compliance and MSL rating of 1 (Unlimited), indicating optimal handling characteristics. This part is recommended for applications requiring automotive-grade qualification or when AEC-Q200 certification is a contractual requirement.

CTDLW21SF-121T04 (Central Technologies)

This substitute part provides a 400mA current rating, which exceeds the 370mA requirement of the main part. All electrical parameters match the ACE1V2012-121-R specification. The part is actively produced with 841 units in inventory and carries ROHS3 compliance. The MSL rating is vendor undefined, which may require clarification for moisture-sensitive assembly environments. This part is suitable for applications where higher current margin is beneficial and automotive qualification is not required. Tape & Reel packaging is standard for high-volume production environments.

SCM20-121T-RC (Allied Components International)

This substitute part matches the 370mA current rating and all electrical parameters of the main part. It is actively produced with 843 units in inventory and carries RoHS compliance. The MSL rating is 1 (Unlimited), matching the main part specification. Physical dimensions are larger (0.126" L x 0.063" W vs. 0.079" L x 0.047" W), which may affect PCB layout compatibility. This part is suitable for applications where MSL consistency with the main part is required and PCB space permits the larger footprint. Tape & Reel packaging is provided.

Frequently Asked Questions (FAQ)

Q: Can CTDLW21SF-121T04 be used as a direct replacement for ACE1V2012-121-R?

A: Yes. The CTDLW21SF-121T04 meets all critical electrical parameters: 120 Ohms @ 100 MHz impedance, 300mOhm DCR, 50V DC voltage rating, and -40°C to 105°C operating temperature. The 400mA current rating exceeds the 370mA requirement. Both parts are 2-line signal line filters in surface mount horizontal 4-pad configuration with ROHS3 compliance. The primary difference is packaging format (Tape & Reel vs. Cut Tape) and undefined MSL rating.

Q: Can SCM20-121T-RC be used as a direct replacement for ACE1V2012-121-R?

A: Yes. The SCM20-121T-RC meets all critical electrical parameters: 120 Ohms @ 100 MHz impedance, 300mOhm DCR, 50V DC voltage rating, and -40°C to 105°C operating temperature. The 370mA current rating matches exactly. Both parts are 2-line signal line filters in surface mount horizontal 4-pad configuration with MSL rating of 1 (Unlimited). The primary difference is physical dimensions and packaging format (Tape & Reel vs. Cut Tape).

Q: What is the impact of different physical dimensions between ACE1V2012-121-R and SCM20-121T-RC?

A: The SCM20-121T-RC is physically larger: 0.126" L x 0.063" W x 0.083" H compared to 0.079" L x 0.047" W x 0.055" H for the ACE1V2012-121-R. This difference may affect PCB layout and component placement. Verify that the larger footprint accommodates your circuit board design before substitution.

Q: Why does CTDLW21SF-121T04 have an undefined MSL rating?

A: The MSL (Moisture Sensitivity Level) rating for CTDLW21SF-121T04 is listed as vendor undefined. This indicates that Central Technologies has not provided this specification. For applications in moisture-sensitive assembly environments, clarify this parameter with the supplier or select SCM20-121T-RC or ACE1V2012-121-R, both of which carry MSL rating of 1 (Unlimited).

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging provides individual component strips suitable for lower-volume or manual assembly operations. Tape & Reel packaging provides continuous reels suitable for automated pick-and-place assembly equipment. Both formats contain the same components; the difference is in handling and assembly process compatibility.

Q: Is AEC-Q200 certification required for my application?

A: AEC-Q200 is an automotive qualification standard. Only the ACE1V2012-121-R carries this certification. If your application requires automotive-grade components or contractual AEC-Q200 compliance, use the ACE1V2012-121-R. For non-automotive applications, CTDLW21SF-121T04 and SCM20-121T-RC are acceptable alternatives.

Q: Can I substitute any of these parts interchangeably in my design?

A: All three parts meet the core electrical specifications (120 Ohms @ 100 MHz, 300mOhm DCR, 50V DC, -40°C to 105°C). However, verify the following before substitution: (1) PCB layout compatibility with physical dimensions, (2) Assembly process compatibility with packaging format, (3) Compliance requirements (AEC-Q200, RoHS level), (4) MSL handling requirements for your manufacturing environment.