CLF7045T-330M Equivalent & Substitute Parts

Part Overview

The CLF7045T-330M is a 33 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 1.4 A continuous current with a maximum DC resistance of 137 mOhm. This surface mount component operates across the temperature range of -40°C to 105°C and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active product lines are necessary to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

CLF7045T-330M

TDK CorporationIn Stock: 1164CLF7045T-330M Datasheet

Current PartRFQ

VLS6045EX-330M

TDK CorporationIn Stock: 13467VLS6045EX-330M Datasheet

MFR RecommendedRFQ

DR73-330-R

Eaton - Electronics DivisionIn Stock: 6215DR73-330-R Datasheet

MFR RecommendedRFQ

DR74-330-R

Eaton - Electronics DivisionIn Stock: 71041DR74-330-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLF7045T-330M is determined by the following critical parameters:

• Inductance Value: All substitutes maintain 33 µH ±20% tolerance
• Current Rating: Substitute parts must support minimum 1.4 A continuous current; higher ratings provide design margin
• DC Resistance: Substitute parts exhibit DCR values ranging from 143 mOhm to 175 mOhm, all acceptable within typical circuit tolerance bands
• Core Material & Shielding: All substitutes use ferrite shielded drum core construction
• Mounting & Package: All substitutes are surface mount components with nonstandard package dimensions
• Operating Temperature: Substitute parts maintain -40°C to 105°C minimum range; some extend to 125°C
• Moisture Sensitivity: All substitutes maintain MSL 1 classification

The three identified substitutes—VLS6045EX-330M, DR73-330-R, and DR74-330-R—meet these core electrical and mechanical requirements while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

VLS6045EX-330M (TDK Corporation): This part is the manufacturer-recommended substitute from TDK's active VLS-EX series. It provides the highest current rating (1.5 A) and saturation current (1.9 A) among the substitutes, offering superior design margin. The part is ROHS3 compliant and maintains TDK manufacturing continuity. The slightly higher DCR (175 mOhm vs. 137 mOhm) remains within acceptable tolerance for most applications. Smaller physical dimensions (6.00mm x 6.00mm vs. 7.20mm x 6.90mm) may provide PCB layout advantages.

DR74-330-R (Eaton - Electronics Division): This part provides the closest DCR match (143 mOhm) to the original CLF7045T-330M and maintains equivalent current rating (1.41 A). It is ROHS3 compliant and offers extended operating temperature range to 125°C. Higher saturation current (1.73 A) provides adequate design margin. Larger inventory availability (70,990 pcs) ensures supply continuity.

DR73-330-R (Eaton - Electronics Division): This part is suitable for applications with lower current demands. Current rating of 1.31 A approaches the minimum threshold; saturation current of 1.35 A provides limited margin. DCR of 166 mOhm is acceptable. ROHS3 compliance and extended temperature range to 125°C are provided. This option is appropriate only when current requirements do not exceed 1.31 A continuous.

All three substitutes maintain obsolescence mitigation through active product status and regulatory compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can VLS6045EX-330M directly replace CLF7045T-330M in existing designs?

A: Yes. Both parts maintain 33 µH inductance at ±20% tolerance, operate at 100 kHz test frequency, and support the required 1.4 A current rating. The VLS6045EX-330M provides higher current capacity (1.5 A) and saturation current (1.9 A), ensuring compatibility. Physical dimensions differ slightly; PCB layout verification is necessary.

Q: What is the significance of DC Resistance (DCR) differences among substitutes?

A: DCR affects power dissipation and thermal performance. The CLF7045T-330M specifies 137 mOhm maximum; substitutes range from 143 mOhm to 175 mOhm. These variations remain within typical circuit tolerance bands for 33 µH inductors. Applications sensitive to DCR-induced losses should prioritize DR74-330-R (143 mOhm) for closest match.

Q: Are all substitutes suitable for the full -40°C to 105°C temperature range?

A: Yes. All three substitutes support -40°C to 105°C operation. DR73-330-R and DR74-330-R extend the upper limit to 125°C, providing additional thermal margin for high-temperature environments.

Q: What packaging differences exist among the substitutes?

A: VLS6045EX-330M is supplied in Cut Tape (CT) and Digi-Reel packaging; DR73-330-R and DR74-330-R are supplied in Tape & Reel (TR). Physical dimensions vary: VLS6045EX-330M measures 6.00mm x 6.00mm x 4.50mm; DR73-330-R and DR74-330-R measure 7.60mm x 7.60mm with heights of 4.65mm and 4.35mm respectively. PCB footprint and assembly process compatibility must be verified.

Q: Why is DR73-330-R listed as a substitute if its current rating (1.31 A) is below the original specification (1.4 A)?

A: DR73-330-R is included based on the provided substitute list. However, its 1.31 A rating falls below the CLF7045T-330M requirement of 1.4 A continuous current. This part is suitable only for applications where actual current demand does not exceed 1.31 A. DR74-330-R or VLS6045EX-330M are preferred for designs requiring the full 1.4 A specification.

Q: Are all substitutes RoHS compliant?

A: Yes. VLS6045EX-330M, DR73-330-R, and DR74-330-R are all ROHS3 compliant. The original CLF7045T-330M RoHS status is not specified in the provided data.