L1007R4R7MPWRT Equivalent & Substitute Parts

Part Overview

The L1007R4R7MPWRT is a 4.7 µH unshielded drum core wirewound inductor manufactured by KEMET in the L-PWR series. This surface mount component is rated for 200 mA continuous current with 100 mOhm DC resistance and operates across the temperature range of -40°C to 105°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

L1007R4R7MPWRT

KEMETIn Stock: 797L1007R4R7MPWRT Datasheet

Current PartRFQ

CB2518T4R7MR

Taiyo YudenIn Stock: 30624CB2518T4R7MR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1007R4R7MPWRT is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 4.7 µH
• Inductance tolerance: ±20%
• Package / Case: 1007 (2518 Metric)
• Core type: Ferrite drum core, wirewound
• Shielding configuration: Unshielded
• Mounting type: Surface mount
• Operating temperature range: -40°C to 105°C
• Self resonant frequency: 45 MHz or higher

Allowable Variation Parameters:

• Current rating: Substitute must equal or exceed 200 mA
• DC resistance: Substitute may vary within acceptable circuit performance limits
• Packaging format: Tape & Reel acceptable as functional equivalent

The CB2518T4R7MR from Taiyo Yuden meets all mandatory matching criteria and provides enhanced current handling capability (1.2 A versus 200 mA), making it a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The CB2518T4R7MR from Taiyo Yuden is a direct functional equivalent to the obsolete L1007R4R7MPWRT. Both components share identical inductance specifications, package geometry, core construction, and operating temperature range. Both maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

The Taiyo Yuden substitute provides superior current handling (1.2 A versus 200 mA), which represents an enhancement for applications requiring higher current capacity. The DC resistance differential (130 mOhm maximum versus 100 mOhm) remains within acceptable circuit performance parameters for most applications utilizing this inductance value and package size.

The CB2518T4R7MR is classified as "Not For New Designs," indicating it is available for replacement and legacy support applications. Selection of this substitute is appropriate for designs requiring direct pin-compatible and functionally equivalent component replacement.

Frequently Asked Questions (FAQ)

Q: Can the CB2518T4R7MR be used as a direct replacement for the L1007R4R7MPWRT?

A: Yes. Both components share identical inductance (4.7 µH), package geometry (1007/2518 Metric), core construction (ferrite drum core wirewound), and operating temperature range (-40°C to 105°C). Physical and electrical compatibility is confirmed.

Q: What is the significance of the higher current rating on the CB2518T4R7MR?

A: The CB2518T4R7MR is rated for 1.2 A continuous current compared to the L1007R4R7MPWRT at 200 mA. This represents enhanced current handling capability. For applications operating at or below 200 mA, both components perform identically. For applications requiring higher current capacity, the Taiyo Yuden part provides additional design margin.

Q: Does the DC resistance difference affect circuit performance?

A: The CB2518T4R7MR specifies 130 mOhm maximum DCR versus 100 mOhm for the KEMET part. This 30 mOhm differential is within acceptable tolerance for most circuit applications using 4.7 µH inductors in this package class. Circuit-specific analysis is required only for applications with stringent power loss or voltage drop requirements.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the L1007R4R7MPWRT and CB2518T4R7MR are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What is the difference between the packaging formats?

A: The L1007R4R7MPWRT is supplied in standard packaging format, while the CB2518T4R7MR is supplied in Tape & Reel (TR) format. Both formats contain identical components; the difference is in the delivery and handling method. Tape & Reel format is standard for high-volume manufacturing and automated assembly processes.

Q: Can the self-resonant frequency difference (45 MHz versus 46 MHz) impact circuit operation?

A: Both components operate at self-resonant frequencies well above typical application frequencies for 4.7 µH inductors. The 1 MHz difference is negligible for standard circuit applications and does not affect functional equivalence.