CLF10040T-331M Equivalent & Substitute Parts

Part Overview

The CLF10040T-331M is a 330 µH shielded drum core, wirewound inductor manufactured by TDK Corporation, rated for 530 mA with a maximum DC resistance of 1.032 Ohm. This surface mount component operates across -40°C to 105°C and is designed for power applications requiring ferrite core shielding. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

CLF10040T-331M

TDK CorporationIn Stock: 2184CLF10040T-331M Datasheet

Current PartRFQ

BPSC00101140331M00

Pulse ElectronicsIn Stock: 1036BPSC00101140331M00 Datasheet

MFR RecommendedRFQ

BPSC00101140331T00

Pulse ElectronicsIn Stock: 1125BPSC00101140331T00 Datasheet

MFR RecommendedRFQ

CDRH104RT125NP-331MC

Sumida America Components Inc.In Stock: 1018CDRH104RT125NP-331MC Datasheet

MFR RecommendedRFQ

SRU1038-331Y

Bourns Inc.In Stock: 1867SRU1038-331Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CLF10040T-331M is determined by the following critical parameters:

• Inductance Value: Must be 330 µH at 100 kHz test frequency
• Core Material: Must be ferrite with shielding
• Mounting Type: Must be surface mount
• Current Handling: Saturation current (Isat) must support minimum 700 mA; rated current should accommodate 530 mA operation
• DC Resistance: Must not exceed 1.032 Ohm to maintain circuit performance
• Operating Temperature: Must support minimum -40°C ~ 105°C range
• Package Compatibility: Physical dimensions and height must be compatible with PCB layout constraints
• MSL Rating: Must be MSL 1 (Unlimited)

All four substitute parts meet these core substitution criteria. Differences in inductance tolerance, saturation current specifications, and extended temperature ranges represent acceptable variations within engineering design margins.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CDRH104RT125NP-331MC (Sumida America Components Inc.)

This part provides the closest electrical match to the CLF10040T-331M with identical saturation current (700 mA), matching inductance tolerance (±20%), and comparable DC resistance (1.06 Ohm Max). The part carries AEC-Q200 certification and RoHS compliance, supporting automotive and industrial applications. Physical dimensions (10.20mm x 10.00mm x 4.00mm) are compatible with the original footprint.

Secondary Substitute: SRU1038-331Y (Bourns Inc.)

This drum core, wirewound inductor matches the original construction type and offers superior DC resistance (773 mOhm), reducing power dissipation. The part is ROHS3 compliant and active in production. Physical dimensions (10.00mm x 10.00mm x 4.10mm) provide exact length and width compatibility with the original. Note: Saturation current is 520 mA, which is lower than the original specification and requires circuit validation for applications approaching 530 mA operation.

Tertiary Substitutes: BPSC00101140331M00 and BPSC00101140331T00 (Pulse Electronics)

Both Pulse Electronics parts maintain 330 µH inductance with ferrite shielding and extended operating temperature to 125°C. BPSC00101140331M00 matches the original ±20% tolerance, while BPSC00101140331T00 has ±30% tolerance. DC resistance is slightly elevated (1.09 Ohm Max) compared to the original. Saturation current (680 mA) is marginally lower than the original specification. Physical dimensions (10.50mm x 10.30mm x 4.00mm) represent a minor footprint increase requiring PCB layout verification.

All substitute parts are active in production with current inventory availability, eliminating obsolescence risk.

Frequently Asked Questions (FAQ)

Q: Can I use SRU1038-331Y as a direct replacement if my circuit operates at 530 mA?

A: SRU1038-331Y has a saturation current of 520 mA, which is below the original 530 mA rated current. Circuit validation is required to confirm acceptable performance at your specific operating current. If your application consistently operates at or above 530 mA, CDRH104RT125NP-331MC or BPSC00101140331M00 are more suitable choices.

Q: What is the impact of the ±30% inductance tolerance in BPSC00101140331T00 and SRU1038-331Y?

A: Inductance tolerance affects circuit resonance, filtering characteristics, and impedance matching. The original CLF10040T-331M specifies ±20% tolerance. Parts with ±30% tolerance introduce greater variation and require circuit simulation or testing to confirm acceptable performance in your specific application.

Q: Are the physical dimension differences between substitutes critical?

A: Pulse Electronics parts (BPSC series) are 0.5mm larger in length and width compared to the original. Verify PCB layout clearances, trace routing, and thermal management requirements. SRU1038-331Y and CDRH104RT125NP-331MC maintain closer dimensional compatibility with the original footprint.

Q: Which substitute offers the lowest power dissipation?

A: SRU1038-331Y has the lowest DC resistance at 773 mOhm, resulting in the lowest I²R power dissipation. CDRH104RT125NP-331MC (1.06 Ohm Max) and BPSC parts (1.09 Ohm Max) have higher dissipation but remain within acceptable ranges for most applications.

Q: Do all substitutes support the original operating temperature range of -40°C to 105°C?

A: Yes. All substitute parts support -40°C to 125°C, which exceeds the original -40°C to 105°C range. Extended temperature capability provides additional design margin.

Q: What certifications should I prioritize for automotive or industrial applications?

A: CDRH104RT125NP-331MC carries AEC-Q200 certification, suitable for automotive applications. SRU1038-331Y is ROHS3 compliant. BPSC parts are ROHS3 compliant. Verify specific certification requirements for your end application.