CLF10040T-331M-H Equivalent & Substitute Parts

Part Overview

The CLF10040T-331M-H is a 330 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 700 mA continuous current with 860 mOhm DC resistance. This surface mount component operates across -40°C to 125°C and is specified for 100 kHz inductance testing. The part carries a "Not For New Designs" status, making identification of equivalent alternatives essential for ongoing production and design continuity.

Substiute Parts

CLF10040T-331M-H

TDK CorporationIn Stock: 2003CLF10040T-331M-H Datasheet

Current PartRFQ

CLF10060NIT-331M-D

TDK CorporationIn Stock: 2743CLF10060NIT-331M-D Datasheet

MFR RecommendedRFQ

7447714331

Würth ElektronikIn Stock: 21807447714331 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Inductance Value: Must be 330 µH with ±20% tolerance
• Current Rating: Minimum 700 mA continuous current capability
• Saturation Current (Isat): Must support circuit peak current requirements
• DC Resistance: Lower DCR values improve efficiency; higher values acceptable if circuit design permits
• Core Material: Ferrite drum core construction required
• Shielding: Shielded configuration mandatory
• Operating Temperature: Must cover -40°C to 125°C minimum
• Mounting Type: Surface mount only
• Compliance: ROHS3 compliance required

Two qualified substitutes meet these criteria: CLF10060NIT-331M-D (TDK Corporation) and 7447714331 (Würth Elektronik).

Parameter Comparison

Engineering Selection Recommendations

CLF10060NIT-331M-D (TDK Corporation) is a direct TDK alternative with improved DC resistance (534 mOhm Max vs. 860 mOhm), higher saturation current (700 mA vs. 530 mA), and extended temperature range (-55°C ~ 150°C). This part carries AEC-Q200 automotive qualification and Last Time Buy status. Dimensional differences include increased height (6.30mm vs. 4.10mm) and slightly larger footprint. Packaging is Cut Tape (CT) rather than Tape & Reel (TR).

7447714331 (Würth Elektronik) is an active production alternative with the lowest DC resistance (750 mOhm Max), highest saturation current (1 A), and specified self-resonant frequency (3.15 MHz). This part maintains Tape & Reel packaging and AEC-Q200 certification. Height is 5.00mm with identical length and width to the main part. Operating temperature matches the original specification (-40°C ~ 125°C).

For applications requiring continued supply and active product status, 7447714331 is the preferred selection. For TDK-specific supply chains, CLF10060NIT-331M-D provides superior electrical performance with extended temperature capability.

Frequently Asked Questions (FAQ)

Q: Can CLF10060NIT-331M-D be used as a direct replacement for CLF10040T-331M-H?

A: Electrical substitution is valid. Both parts share identical inductance (330 µH ±20%), current rating (700 mA), and core construction. The substitute offers lower DC resistance and higher saturation current. Physical dimensions differ: CLF10060NIT-331M-D is 6.30mm tall versus 4.10mm for the original. PCB layout verification is required if height clearance is constrained.

Q: What is the impact of different DC resistance values?

A: CLF10040T-331M-H specifies 860 mOhm, while substitutes offer 534 mOhm (CLF10060NIT-331M-D) and 750 mOhm (7447714331). Lower resistance reduces power dissipation and heat generation. If the original design accounts for 860 mOhm losses, lower-resistance substitutes will improve efficiency without circuit modification.

Q: Are packaging format differences significant?

A: CLF10040T-331M-H and 7447714331 use Tape & Reel (TR) packaging. CLF10060NIT-331M-D uses Cut Tape (CT). This affects handling and automated assembly processes. TR format is standard for high-volume production; CT is suitable for lower volumes or manual assembly.

Q: Does saturation current difference affect circuit operation?

A: Saturation current (Isat) defines the current level at which inductance begins to degrade. CLF10040T-331M-H saturates at 530 mA; substitutes saturate at 700 mA (CLF10060NIT-331M-D) or 1 A (7447714331). If circuit peak current exceeds the original Isat specification, the substitute with higher Isat prevents inductance collapse and maintains circuit performance.

Q: Which substitute is recommended for new designs?

A: 7447714331 (Würth Elektronik) carries Active product status and AEC-Q200 certification, making it suitable for new design qualification. CLF10060NIT-331M-D is Last Time Buy, indicating limited future availability.

Q: Are all substitutes ROHS3 compliant?

A: Yes. CLF10040T-331M-H, CLF10060NIT-331M-D, and 7447714331 are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).