CLF12555T-331M-CA Equivalent & Substitute Parts

Part Overview

The CLF12555T-331M-CA is a 330 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 700 mA continuous current with a maximum DC resistance of 672 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across the industrial temperature range of -40°C to 105°C and meets AEC-Q200 automotive qualification standards.

Substiute Parts

CLF12555T-331M-CA

TDK CorporationIn Stock: 761CLF12555T-331M-CA Datasheet

Current PartRFQ

48331SC

Murata Power SolutionsIn Stock: 165348331SC Datasheet

MFR RecommendedRFQ

CDRH125/LDNP-331MC

Sumida America Components Inc.In Stock: 1105CDRH125/LDNP-331MC Datasheet

MFR RecommendedRFQ

CDRH12D58RNP-331MC

Sumida America Components Inc.In Stock: 874CDRH12D58RNP-331MC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CLF12555T-331M-CA is determined by the following critical parameters:

• Inductance Value: Must be 330 µH with ±20% tolerance
• Shielding Configuration: Must be shielded to maintain electromagnetic isolation
• Mounting Technology: Must be surface mount compatible
• Current Rating: Substitute must support minimum 700 mA continuous current
• DC Resistance: Lower or equivalent DCR values are acceptable
• Operating Temperature: Must support the full -40°C to 105°C range or equivalent industrial range
• Package Footprint: Physical dimensions must be compatible with PCB layout constraints

All three substitute parts meet these core substitution criteria while offering improved current handling or reduced DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

48331SC (Murata Power Solutions): This substitute offers improved current handling at 850 mA with reduced DC resistance of 630 mOhm, providing better thermal performance. The part is ROHS3 compliant and actively manufactured. However, the maximum operating temperature is limited to 85°C, which is 20°C below the original specification. This substitute is suitable for applications where the upper temperature limit does not exceed 85°C.

CDRH125/LDNP-331MC (Sumida America Components Inc.): This substitute maintains ferrite core construction and supports 850 mA current rating with a maximum operating temperature of 100°C. DC resistance is 710 mOhm, slightly higher than the original part. The part is ROHS3 compliant and actively produced. This option is appropriate for applications requiring extended temperature operation up to 100°C but not exceeding that limit.

CDRH12D58RNP-331MC (Sumida America Components Inc.): This substitute provides the highest current rating at 900 mA with the lowest DC resistance of 544 mOhm, delivering superior thermal efficiency. It maintains the full -40°C to 105°C operating temperature range matching the original specification and includes saturation current specification of 1.22 A. The part is ROHS3 compliant and actively manufactured. This option is the most direct functional replacement for applications requiring the complete original temperature range and improved performance margins.

All three substitutes are actively produced, ROHS3 compliant, and maintain MSL 1 moisture sensitivity classification. Physical dimensions are compatible within typical PCB layout tolerances.

Frequently Asked Questions (FAQ)

Q: Can the 48331SC substitute be used in applications requiring operation above 85°C?

A: No. The 48331SC maximum operating temperature is 85°C. Applications requiring operation at 100°C or above must use CDRH125/LDNP-331MC or CDRH12D58RNP-331MC.

Q: What is the primary advantage of CDRH12D58RNP-331MC over the other substitutes?

A: The CDRH12D58RNP-331MC offers the lowest DC resistance at 544 mOhm, highest current rating at 900 mA, and maintains the full -40°C to 105°C operating temperature range of the original CLF12555T-331M-CA. This makes it the most direct functional replacement.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts are ROHS3 compliant. The original CLF12555T-331M-CA RoHS status was not specified in the available data.

Q: Do the substitute parts have identical physical dimensions?

A: No. The original part measures 12.50 x 12.10 mm, while substitutes measure 12.20 x 12.20 mm or 12.00 x 12.00 mm. All parts have seated heights of 5.85 to 6.00 mm. PCB layout verification is required to confirm footprint compatibility.

Q: What is the significance of the different inductance test frequencies?

A: The 48331SC is tested at 10 kHz while the original and other substitutes are tested at 100 kHz. This difference reflects manufacturer test methodology and does not affect substitution eligibility, as all parts maintain the same 330 µH inductance value and ±20% tolerance.

Q: Can substitutes be intermixed on the same PCB?

A: Yes, provided the application requirements fall within the operating parameters of each selected part. However, thermal and electrical performance characteristics differ between substitutes, so design verification is necessary if mixing parts in the same assembly.