L1007C471MPWST Equivalent & Substitute Parts

Part Overview

The L1007C471MPWST is a 470 µH unshielded drum core wirewound inductor manufactured by KEMET in the 1007 (2518 Metric) surface mount package. This component is designed for applications requiring moderate inductance values with a 25 mA current rating and 10Ω DC resistance. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

L1007C471MPWST

KEMETIn Stock: 1078L1007C471MPWST Datasheet

Current PartRFQ

CB2518T471K

Taiyo YudenIn Stock: 1599CB2518T471K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1007C471MPWST is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 470 µH
• Package / Case: 1007 (2518 Metric)
• Core type: Ferrite drum core, unshielded
• Mounting type: Surface mount
• Operating temperature range: -40°C ~ 105°C
• Self resonant frequency: 3.5 MHz

Allowable Variation Parameters:

• Current rating: Substitute must equal or exceed the main part rating (25 mA minimum)
• DC resistance: Substitute may vary within application tolerance
• Inductance tolerance: Substitute tolerance may be tighter or equivalent
• RoHS and MSL compliance: Substitute must maintain or exceed compliance level

The CB2518T471K from Taiyo Yuden meets all mandatory matching criteria and provides superior current handling capability (120 mA versus 25 mA), making it a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The CB2518T471K from Taiyo Yuden is a direct functional equivalent to the L1007C471MPWST. Both components share identical physical dimensions, package specifications, and core electrical characteristics. The substitute part provides enhanced performance through a higher current rating (120 mA versus 25 mA) and tighter inductance tolerance (±10% versus ±20%), while maintaining full compliance with ROHS3 and MSL 1 requirements.

The main part is classified as obsolete, while the substitute is classified as not for new designs. For applications currently using the L1007C471MPWST, the CB2518T471K provides a viable path for design continuity and procurement stability. The increased current rating and improved tolerance of the substitute part present no compatibility issues for circuits designed around the original component's specifications.

Frequently Asked Questions (FAQ)

Q: Can the CB2518T471K be used as a direct replacement for the L1007C471MPWST in existing designs?

A: Yes. Both components share identical inductance values (470 µH), package dimensions (1007 / 2518 Metric), core type (ferrite drum core, unshielded), and operating temperature range (-40°C ~ 105°C). The substitute part's higher current rating (120 mA) and tighter tolerance (±10%) are compatible with circuits designed for the original part.

Q: What is the difference in DC resistance between these parts?

A: The L1007C471MPWST has a DC resistance of 10Ω, while the CB2518T471K has a maximum DC resistance of 13Ω. This 3Ω difference must be evaluated within the context of the specific application's impedance requirements.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the L1007C471MPWST and CB2518T471K are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating full compliance with current environmental and handling standards.

Q: Why does the substitute part have a higher current rating?

A: The CB2518T471K is rated for 120 mA continuous current with a saturation current (Isat) of 35 mA, compared to the L1007C471MPWST's 25 mA rating. This reflects differences in core material composition and winding design between manufacturers, resulting in improved thermal and magnetic performance in the substitute part.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both components measure 0.098" L x 0.071" W (2.50mm x 1.80mm) with a maximum seated height of 0.079" (2.00mm), ensuring mechanical compatibility in PCB layouts and assembly processes.

Q: What is the significance of the inductance tolerance difference?

A: The L1007C471MPWST has a ±20% tolerance, while the CB2518T471K has a ±10% tolerance. The tighter tolerance of the substitute part provides greater inductance value consistency, which may improve circuit performance in applications sensitive to inductance variation.

Q: Can these parts be used interchangeably in tape and reel packaging?

A: The L1007C471MPWST is supplied in standard packaging, while the CB2518T471K is supplied in Tape & Reel (TR) format. Both are surface mount components compatible with automated assembly equipment, though packaging format should be confirmed with procurement requirements.