L1007C4R7MPWST Equivalent & Substitute Parts

Part Overview

The L1007C4R7MPWST is a 4.7 µH unshielded drum core wirewound inductor manufactured by KEMET, rated for 240 mA continuous current with 130mOhm DC resistance. This component is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

L1007C4R7MPWST

KEMETIn Stock: 2054L1007C4R7MPWST Datasheet

Current PartRFQ

LB2518T4R7M

Taiyo YudenIn Stock: 5275LB2518T4R7M Datasheet

SimilarRFQ

LB2518T4R7MR

Taiyo YudenIn Stock: 2747LB2518T4R7MR Datasheet

SimilarRFQ

LBC2518T4R7M

Taiyo YudenIn Stock: 3542LBC2518T4R7M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1007C4R7MPWST is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 4.7 µH (exact match required)
• Package / Case: 1007 (2518 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Tolerance: ±20% (exact match required)
• Shielding: Unshielded (exact match required)

Secondary Compatibility Parameters:

• Current Rating: Must equal or exceed 240 mA
• DC Resistance: Must be within acceptable circuit operating parameters
• Operating Temperature Range: Must encompass -40°C ~ 105°C or be compatible with application requirements
• RoHS and MSL compliance: Must maintain regulatory compliance

The substitute parts are grouped into two categories based on electrical performance characteristics:

Category A - Direct Electrical Equivalents (240 mA rated):

• LB2518T4R7M (Taiyo Yuden): Identical current rating and DCR specifications

Category B - Higher Current Rated Alternatives:

• LB2518T4R7MR (Taiyo Yuden): 235 mA rated, 100mOhm DCR (lower resistance)
• LBC2518T4R7M (Taiyo Yuden): 510 mA rated, 200mOhm DCR (higher current capacity)

Parameter Comparison

Engineering Selection Recommendations

LB2518T4R7M (Taiyo Yuden) - Primary Substitute:

This part provides direct electrical and mechanical equivalence to the L1007C4R7MPWST. Identical inductance, current rating, and DC resistance specifications ensure drop-in compatibility. The operating temperature range of -25°C ~ 105°C covers the upper portion of the original specification. Both parts maintain ROHS3 compliance and MSL 1 rating. The primary difference is packaging format (Tape & Reel versus Cut Tape) and product status classification (Not For New Designs). This substitute is suitable for replacement in existing designs and production continuity.

LB2518T4R7MR (Taiyo Yuden) - Alternative for Lower Resistance Applications:

This part maintains the 4.7 µH inductance and 1007 (2518 Metric) package but features reduced DC resistance (100mOhm versus 130mOhm) and slightly lower current rating (235 mA versus 240 mA). The full operating temperature range (-40°C ~ 105°C) matches the original specification. Selection of this part is appropriate when lower DC resistance is beneficial to circuit performance and the 235 mA current rating is sufficient for the application.

LBC2518T4R7M (Taiyo Yuden) - Alternative for Higher Current Applications:

This part provides significantly higher current capacity (510 mA) while maintaining the 4.7 µH inductance and 1007 (2518 Metric) package. The increased DC resistance (200mOhm) and slightly lower self-resonant frequency (41MHz versus 46MHz) reflect the higher current design. The full operating temperature range (-40°C ~ 105°C) matches the original specification. Selection of this part is appropriate when higher current handling capability is required and the increased DCR is acceptable for the circuit design.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can LB2518T4R7M be used as a direct replacement for L1007C4R7MPWST?

A: Yes. The LB2518T4R7M provides identical electrical specifications (4.7 µH, 240 mA, 130mOhm DCR) and mechanical compatibility (1007/2518 Metric package, surface mount). The primary difference is packaging format (Tape & Reel versus Cut Tape). Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between LB2518T4R7M and LB2518T4R7MR?

A: The LB2518T4R7MR features lower DC resistance (100mOhm versus 130mOhm) and slightly lower current rating (235 mA versus 240 mA). Both maintain 4.7 µH inductance and 1007 (2518 Metric) package compatibility. Selection depends on whether reduced resistance or full 240 mA current capacity is required for the application.

Q: Is LBC2518T4R7M suitable for all applications using L1007C4R7MPWST?

A: LBC2518T4R7M provides higher current capacity (510 mA) but with increased DC resistance (200mOhm) and lower self-resonant frequency (41MHz versus 46MHz). This part is suitable only when higher current handling is required and the increased resistance and frequency characteristics are compatible with circuit design requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (LB2518T4R7M, LB2518T4R7MR, LBC2518T4R7M) are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, matching the original L1007C4R7MPWST specifications.

Q: What is the operating temperature difference between L1007C4R7MPWST and LB2518T4R7M?

A: The L1007C4R7MPWST operates from -40°C to 105°C, while LB2518T4R7M operates from -25°C to 105°C. The LB2518T4R7M does not extend to the lower temperature limit. For applications requiring -40°C operation, LB2518T4R7MR or LBC2518T4R7M are appropriate alternatives, as both support the full -40°C to 105°C range.

Q: Can these parts be used interchangeably in production?

A: LB2518T4R7M provides direct interchangeability with identical electrical and mechanical specifications. LB2518T4R7MR and LBC2518T4R7M require circuit design evaluation due to differences in current rating, DC resistance, and frequency characteristics. Packaging format differences (Tape & Reel versus Cut Tape) may affect procurement and assembly processes.