CLF12555T-4R7N-H Equivalent & Substitute Parts

Part Overview

The CLF12555T-4R7N-H is a 4.7 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 5.3 A continuous current with 11.7 mOhm DC resistance. This component is classified as Not For New Designs, indicating it has been superseded in TDK's product portfolio. Finding equivalent and substitute parts is necessary for ongoing production support, maintenance applications, and legacy system repairs where this inductor specification remains required.

Substiute Parts

CLF12555T-4R7N-H

TDK CorporationIn Stock: 39295CLF12555T-4R7N-H Datasheet

Current PartRFQ

DRA124-4R7-R

Eaton - Electronics DivisionIn Stock: 1376DRA124-4R7-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLF12555T-4R7N-H is determined by the following critical parameters:

• Inductance Value: Must be 4.7 µH to maintain circuit functionality
• Current Rating: Substitute must support minimum 5.3 A continuous current
• DC Resistance: Lower or equivalent DCR is acceptable; higher values may impact thermal performance
• Saturation Current: Must meet or exceed 9.6 A to prevent core saturation under transient conditions
• Shielding: Shielded construction required for electromagnetic compatibility
• Package Footprint: 12.50mm x 12.50mm surface mount footprint for PCB compatibility
• Operating Temperature: Must support -40°C ~ 125°C minimum range
• Compliance: ROHS3 compliance required for regulatory alignment

The DRA124-4R7-R from Eaton Electronics Division qualifies as a direct substitute based on matching inductance, shielded construction, compatible current ratings, and identical package footprint.

Parameter Comparison

Engineering Selection Recommendations

The DRA124-4R7-R is a qualified substitute for the CLF12555T-4R7N-H based on the following engineering criteria:

Functional Equivalence: Both inductors provide 4.7 µH inductance with shielded construction and surface mount packaging in identical 12.50mm x 12.50mm footprints, ensuring direct PCB compatibility.

Current Handling: The DRA124-4R7-R current rating of 5.47 A exceeds the CLF12555T-4R7N-H requirement of 5.3 A. The saturation current of 9.06 A is marginally lower than 9.6 A; this difference is acceptable for applications where transient current spikes remain within normal operating margins.

Thermal Considerations: The DRA124-4R7-R exhibits 14 mOhm DC resistance compared to 11.7 mOhm in the original part. This 2.3 mOhm increase results in proportionally higher I²R losses. In power-critical applications, thermal analysis is required to confirm acceptable temperature rise.

Compliance and Support: The DRA124-4R7-R holds Active product status with ROHS3 compliance and AEC-Q200 automotive qualification, providing long-term supply assurance and regulatory alignment. The CLF12555T-4R7N-H Not For New Designs status indicates limited future availability.

Physical Compatibility: The DRA124-4R7-R height of 4.50mm is 1.0mm lower than the CLF12555T-4R7N-H at 5.50mm, providing improved PCB clearance in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the DRA124-4R7-R be used as a direct drop-in replacement for the CLF12555T-4R7N-H?

A: Yes, for most applications. Both parts share identical inductance values, shielded construction, and 12.50mm x 12.50mm surface mount footprints. The DRA124-4R7-R's lower profile (4.50mm vs. 5.50mm) may require PCB layout verification in height-constrained assemblies. The 2.3 mOhm higher DC resistance should be evaluated in circuits where thermal performance is critical.

Q: What is the impact of the higher DC resistance in the DRA124-4R7-R?

A: Higher DC resistance increases resistive losses proportional to I². At the rated 5.3 A current, the additional 2.3 mOhm results in approximately 0.065 W additional power dissipation compared to the original part. In applications with continuous high current or limited thermal dissipation, thermal modeling is recommended to confirm acceptable operating temperature.

Q: Are there any compliance or certification differences between these parts?

A: The DRA124-4R7-R includes AEC-Q200 automotive qualification, which the CLF12555T-4R7N-H does not specify. Both parts are ROHS3 compliant. The Eaton part's Active product status ensures ongoing availability and support, whereas the TDK part is Not For New Designs.

Q: Does the lower saturation current of the DRA124-4R7-R affect circuit performance?

A: The DRA124-4R7-R saturation current is 9.06 A versus 9.6 A in the original part. This 0.54 A difference is acceptable provided circuit transient currents remain below 9.06 A. For applications with predictable current profiles within normal operating ranges, this substitution is suitable. Applications with frequent or severe current spikes should be analyzed to confirm margin.

Q: What is the inductance tolerance difference, and does it matter?

A: The CLF12555T-4R7N-H has ±30% tolerance while the DRA124-4R7-R has ±20% tolerance. The Eaton part's tighter tolerance provides better inductance consistency and may improve circuit performance in applications sensitive to inductance variation. This is a beneficial characteristic for substitution.

Q: Can I use the DRA124-4R7-R in applications requiring the full -40°C ~ 125°C temperature range?

A: Yes. The DRA124-4R7-R supports -40°C ~ 165°C, which exceeds the original specification. Both parts are suitable for the full -40°C ~ 125°C operating range.