CLF12555T-331M-D Equivalent & Substitute Parts

Part Overview

The CLF12555T-331M-D 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 surface mount component is designed for applications requiring stable inductance performance across industrial temperature ranges (-40°C to 150°C) and meets AEC-Q200 automotive qualification standards.

The part is currently in active production status. Substitute parts become necessary when the original packaging format (Tape & Reel) is unavailable, when higher current ratings are required for design margin, or when alternative DC resistance characteristics better suit application requirements.

Substiute Parts

CLF12555T-331M-D

TDK CorporationIn Stock: 823CLF12555T-331M-D Datasheet

Current PartRFQ

CLF12577NIT-331M-D

TDK CorporationIn Stock: 2337CLF12577NIT-331M-D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CLF12577NIT-331M-D qualifies as a direct substitute based on the following critical parameters:

Inductance value remains constant at 330 µH with identical ±20% tolerance, ensuring equivalent magnetic performance in the circuit. Both parts utilize ferrite drum core construction with shielding, maintaining electromagnetic isolation characteristics. The saturation current specification (1.2 A) is identical for both parts, defining the maximum current before inductance degradation occurs.

Substitution is valid because the CLF12577NIT-331M-D maintains all core electrical specifications while offering improved DC resistance performance (492 mOhm Max versus 672 mOhm Max) and higher continuous current rating (1.2 A versus 700 mA). Both parts meet AEC-Q200 automotive standards and ROHS3 compliance requirements. The primary difference is packaging format (Cut Tape versus Tape & Reel) and extended lower temperature operating range (-55°C versus -40°C minimum).

Parameter Comparison

Engineering Selection Recommendations

The CLF12555T-331M-D remains the primary selection for new designs due to active production status and standard Tape & Reel packaging format suitable for automated assembly processes.

The CLF12577NIT-331M-D serves as a qualified substitute when the original part becomes unavailable. This substitute offers superior electrical characteristics with lower DC resistance (492 mOhm versus 672 mOhm), resulting in reduced power dissipation and improved thermal performance. The higher continuous current rating (1.2 A versus 700 mA) provides additional design margin for applications approaching the original part's current limits.

Both parts maintain identical inductance specifications, saturation current, and AEC-Q200 automotive qualification. The extended lower temperature range of the substitute (-55°C minimum) accommodates more demanding thermal environments.

The substitute's Last Time Buy status indicates limited future availability. Designs utilizing the CLF12577NIT-331M-D should establish long-term supply strategies or transition planning to alternative inductors if extended production life is required.

Frequently Asked Questions (FAQ)

Q: Can CLF12577NIT-331M-D replace CLF12555T-331M-D in existing designs?

A: Yes. Both parts share identical inductance (330 µH), tolerance (±20%), saturation current (1.2 A), core material (ferrite), and shielding characteristics. The substitute offers improved DC resistance and higher continuous current rating, making it electrically compatible and functionally superior for the same circuit application.

Q: What is the primary difference between these two parts?

A: The main differences are packaging format (Tape & Reel versus Cut Tape), DC resistance specification (672 mOhm Max versus 492 mOhm Max), continuous current rating (700 mA versus 1.2 A), and product status (Active versus Last Time Buy). Electrical performance at rated inductance and saturation current remains equivalent.

Q: Does the lower DC resistance of CLF12577NIT-331M-D affect circuit performance?

A: Lower DC resistance reduces power dissipation in the inductor, resulting in lower operating temperature and improved efficiency. This is a beneficial characteristic that does not negatively impact circuit function when the original part's DC resistance specification was not a critical design constraint.

Q: Are both parts suitable for automated assembly?

A: CLF12555T-331M-D is packaged in Tape & Reel format, optimized for automated pick-and-place assembly. CLF12577NIT-331M-D is supplied in Cut Tape format, requiring manual handling or specialized tape feeding equipment. Assembly process compatibility should be evaluated based on production capabilities.

Q: What compliance certifications apply to both parts?

A: Both parts meet AEC-Q200 automotive qualification standards, ROHS3 compliance, and carry EAR99 export classification. REACH status is unaffected for both components.