L1007C101KPWST Equivalent & Substitute Parts

Part Overview

The L1007C101KPWST is a 100 µH unshielded drum core wirewound inductor manufactured by KEMET, designed for surface mount applications in the 1007 (2518 Metric) package. This component is rated for 55 mA continuous current with a DC resistance of 2.1 Ohm and operates across the temperature range of -40°C to 105°C.

The L1007C101KPWST has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

L1007C101KPWST

KEMETIn Stock: 784L1007C101KPWST Datasheet

Current PartRFQ

CB2518T101K

Taiyo YudenIn Stock: 1322CB2518T101K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L1007C101KPWST are identified based on strict electrical and mechanical compatibility criteria. The following parameters must align for valid substitution:

Critical Matching Parameters:

• Inductance value: 100 µH (±10% tolerance)
• Package / Case: 1007 (2518 Metric)
• Mounting Type: Surface Mount
• Core Material: Ferrite, Unshielded Drum Core
• Operating Temperature Range: -40°C to 105°C
• Self Resonant Frequency: 9 MHz

Allowable Variation Parameters:

• Current Rating: Substitute parts may exceed the original 55 mA rating, provided the DC resistance and thermal characteristics remain within acceptable design margins
• DC Resistance: Substitute parts may vary within the tolerance band established by the inductance specification and core material properties

The CB2518T101K from Taiyo Yuden meets all critical matching parameters and qualifies as a direct substitute, despite differences in current rating and DC resistance specifications.

Parameter Comparison

Engineering Selection Recommendations

CB2518T101K (Taiyo Yuden) Substitution Basis:

The CB2518T101K qualifies as a direct electrical and mechanical substitute for the L1007C101KPWST based on identical inductance specification, package geometry, and operating temperature range. Both components are ROHS3 compliant and feature MSL 1 moisture sensitivity ratings, ensuring equivalent environmental performance.

The CB2518T101K exhibits a higher current rating (260 mA versus 55 mA) and increased DC resistance (2.73 Ohm Max versus 2.1 Ohm). These differences do not preclude substitution in applications where the original 55 mA current requirement is maintained. The higher current capacity of the substitute part provides additional design margin without compromising circuit performance at the specified operating point.

Both components share identical self-resonant frequency (9 MHz) and inductance test frequency (796 kHz) characteristics, confirming frequency-dependent behavior alignment.

The CB2518T101K carries a "Not For New Designs" product status, indicating limited long-term availability. The L1007C101KPWST is classified as obsolete. For applications requiring extended supply assurance, alternative sourcing strategies or design modifications may be necessary.

Frequently Asked Questions (FAQ)

Q: Can the CB2518T101K replace the L1007C101KPWST in existing designs?

A: Yes. The CB2518T101K is electrically and mechanically compatible with the L1007C101KPWST. Both components share identical inductance (100 µH), package dimensions (1007 / 2518 Metric), and operating temperature range (-40°C to 105°C). The substitute part's higher current rating does not affect performance when operated within the original design's current specifications.

Q: What are the differences in DC resistance between these parts?

A: The L1007C101KPWST specifies 2.1 Ohm DC resistance, while the CB2518T101K specifies 2.73 Ohm maximum. This 0.63 Ohm difference results from manufacturing variations and core material properties. For applications sensitive to DC resistance, circuit performance should be evaluated at the CB2518T101K's maximum specified value.

Q: Are both parts RoHS compliant?

A: Yes. Both the L1007C101KPWST and CB2518T101K are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, confirming equivalent environmental and regulatory compliance.

Q: What is the significance of the product status difference?

A: The L1007C101KPWST is classified as obsolete, indicating discontinued production. The CB2518T101K carries "Not For New Designs" status, indicating limited availability and potential future discontinuation. Neither part is recommended for new design initiation; however, the CB2518T101K remains available for legacy design support.

Q: Do these inductors have identical package footprints?

A: Yes. Both components use the 1007 (2518 Metric) package with identical dimensions: 0.098" L x 0.071" W (2.50mm x 1.80mm) and maximum seated height of 0.079" (2.00mm). PCB layout and assembly processes require no modification for substitution.

Q: What is the current saturation specification for the CB2518T101K?

A: The CB2518T101K specifies a saturation current (Isat) of 60 mA. This parameter is not provided for the L1007C101KPWST. The saturation current represents the point at which inductance begins to degrade due to core saturation. Applications operating at or near 55 mA should evaluate this specification against design requirements.