L1007R4R7MPWST Equivalent & Substitute Parts

Part Overview

The L1007R4R7MPWST is a 4.7 µH unshielded drum core wirewound inductor manufactured by KEMET in the 1007 (2518 Metric) surface mount package. This component is designed for applications requiring low inductance values with moderate current handling capability. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and design requirements.

Substiute Parts

L1007R4R7MPWST

KEMETIn Stock: 1036L1007R4R7MPWST Datasheet

Current PartRFQ

CB2518T4R7MR

Taiyo YudenIn Stock: 30624CB2518T4R7MR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1007R4R7MPWST 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 material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Operating temperature range: -40°C to 105°C
• Self resonant frequency: 46 MHz

Allowable Variation Parameters:

• Current rating: Substitute must equal or exceed the original 235 mA rating
• DC resistance: Substitute specifications must be compatible with circuit design requirements

The CB2518T4R7MR from Taiyo Yuden meets all mandatory matching parameters and provides enhanced current handling capability (1.2 A versus 235 mA), making it a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The CB2518T4R7MR is a direct functional equivalent to the obsolete L1007R4R7MPWST. Both components share identical inductance specifications, package geometry, and operating characteristics. The Taiyo Yuden substitute provides superior current handling (1.2 A versus 235 mA), which represents an enhancement for applications operating near the original current rating limits.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in production environments. The CB2518T4R7MR is classified as "Not For New Designs" by Taiyo Yuden; however, this status does not preclude its use as a substitute for obsolete components in existing designs or production continuity scenarios.

The DC resistance differential (100 mOhm versus 130 mOhm maximum) must be evaluated within specific circuit requirements. Applications with strict DCR specifications should confirm compatibility with the substitute's maximum resistance value.

Frequently Asked Questions (FAQ)

Q: Can the CB2518T4R7MR directly replace the L1007R4R7MPWST in existing designs?

A: Yes. Both components share identical inductance values, package dimensions (1007 / 2518 Metric), core material, and operating temperature ranges. The substitute provides higher current capacity, which is compatible with the original application requirements.

Q: What is the significance of the current rating difference between the two parts?

A: The L1007R4R7MPWST is rated for 235 mA, while the CB2518T4R7MR is rated for 1.2 A. The substitute's higher rating provides additional design margin and does not create incompatibility. Applications operating below 235 mA experience no functional change.

Q: Are there differences in DC resistance that affect circuit performance?

A: The L1007R4R7MPWST specifies 100 mOhm DCR, while the CB2518T4R7MR specifies 130 mOhm maximum. This 30 mOhm difference may impact circuits with tight resistance budgets. Verify that the substitute's maximum DCR value remains within acceptable design tolerances for your specific application.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the L1007R4R7MPWST and CB2518T4R7MR are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is identical (MSL 1 / Unlimited) for both components.

Q: What is the significance of the "Not For New Designs" status on the CB2518T4R7MR?

A: This designation indicates that Taiyo Yuden does not recommend the CB2518T4R7MR for new product development. However, this status does not affect its suitability as a substitute for obsolete components in existing production or design continuity applications.

Q: Are the package dimensions and mounting characteristics identical?

A: Yes. Both components use the 1007 (2518 Metric) surface mount package with identical physical dimensions: 0.098" L × 0.071" W (2.50 mm × 1.80 mm) and maximum seated height of 0.079" (2.00 mm). PCB footprints and reflow profiles are compatible.