CLF7045T-221M Equivalent & Substitute Parts

Part Overview

The CLF7045T-221M is a 220 µH shielded drum core, wirewound inductor manufactured by TDK Corporation, rated for 520 mA continuous current with a maximum DC resistance of 792 mOhm. This surface mount component operates across the temperature range of -40°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The CLF7045T-221M is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this inductor specification.

Substiute Parts

CLF7045T-221M

TDK CorporationIn Stock: 1884CLF7045T-221M Datasheet

Current PartRFQ

VLS6045EX-221M

TDK CorporationIn Stock: 2718VLS6045EX-221M Datasheet

MFR RecommendedRFQ

CDRR7D45T125NP-221MC

Sumida America Components Inc.In Stock: 936CDRR7D45T125NP-221MC Datasheet

MFR RecommendedRFQ

DR74-221-R

Eaton - Electronics DivisionIn Stock: 1965DR74-221-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CLF7045T-221M are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 220 µH (exact match required)
• Inductance tolerance: ±20% (matching specification)
• Core material: Ferrite (shielded construction)
• Mounting type: Surface Mount
• Moisture sensitivity level: 1 (Unlimited)
• Inductance test frequency: 100 kHz

Secondary Compatibility Parameters:

• Current rating: Minimum 500 mA (equal to or exceeding the original 520 mA requirement)
• DC resistance: Within acceptable operating parameters for the application
• Operating temperature range: Minimum -40°C to 105°C coverage
• Shielding: Shielded construction maintained

All substitute parts listed maintain the core electrical characteristics and physical mounting requirements necessary for direct replacement in surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

VLS6045EX-221M (TDK Corporation) is the manufacturer-recommended primary substitute. This part maintains TDK manufacturing continuity and is classified as active product status. It provides equivalent inductance and tolerance specifications with improved saturation current (800 mA) and operates within the original temperature range. RoHS3 compliance is confirmed.

CDRR7D45T125NP-221MC (Sumida America Components Inc.) qualifies as an active substitute with extended operating temperature range (-40°C to 125°C). This part carries AEC-Q200 automotive qualification and RoHS compliance. Current rating of 540 mA exceeds the original specification. DC resistance of 830 mOhm remains within acceptable parameters.

DR74-221-R (Eaton - Electronics Division) is an active substitute offering the highest current rating (560 mA) and saturation current (660 mA) among the listed alternatives. Extended temperature range (-40°C to 125°C) and ROHS3 compliance are provided. DC resistance of 907 mOhm represents the highest value among substitutes but remains within functional parameters.

All three substitute parts maintain shielded ferrite core construction, surface mount packaging, and MSL 1 rating, ensuring compatibility with the original CLF7045T-221M application requirements.

Frequently Asked Questions (FAQ)

Q: Can VLS6045EX-221M directly replace CLF7045T-221M in all applications?

A: VLS6045EX-221M meets all primary electrical specifications: 220 µH inductance, ±20% tolerance, ferrite shielded core, and surface mount configuration. The 500 mA current rating is slightly lower than the original 520 mA specification. Verify that your application does not require the full 520 mA continuous current rating before substitution.

Q: What is the difference in DC resistance between the main part and substitutes?

A: CLF7045T-221M specifies 792 mOhm maximum DCR. VLS6045EX-221M has 1.15 Ohm DCR (higher), CDRR7D45T125NP-221MC has 830 mOhm (slightly higher), and DR74-221-R has 907 mOhm (higher). Higher DCR values result in increased power dissipation. Confirm that thermal and power budget requirements are met for your specific application.

Q: Are there temperature range differences between substitutes?

A: CLF7045T-221M and VLS6045EX-221M both operate -40°C to 105°C. CDRR7D45T125NP-221MC and DR74-221-R extend to -40°C to 125°C. If your application requires operation above 105°C, only the Sumida or Eaton parts are suitable.

Q: What compliance certifications should I verify?

A: VLS6045EX-221M is RoHS3 compliant. CDRR7D45T125NP-221MC carries both AEC-Q200 automotive qualification and RoHS compliance. DR74-221-R is ROHS3 compliant. Confirm that your application requirements align with the compliance status of your selected substitute.

Q: How do saturation current ratings affect part selection?

A: Saturation current (Isat) indicates the current level at which the inductor begins to lose inductance. CLF7045T-221M has Isat of 620 mA. VLS6045EX-221M (800 mA), CDRR7D45T125NP-221MC (440 mA), and DR74-221-R (660 mA) provide varying saturation margins. Applications with current transients or peaks should account for these differences.

Q: Is packaging format compatible across all substitutes?

A: All substitute parts are surface mount components with nonstandard package dimensions. Physical footprint dimensions vary slightly. Verify PCB layout compatibility before implementation, particularly if space constraints exist in your design.