L1007C221KPWST Equivalent & Substitute Parts

Part Overview

The L1007C221KPWST is a 220 µH unshielded drum core wirewound inductor manufactured by KEMET in the 1007 (2518 Metric) surface mount package. This component is rated for 40 mA continuous current with a DC resistance of 4.5 Ohm and operates across the temperature range of -40°C to 105°C.

The L1007C221KPWST is classified as obsolete. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure component availability for ongoing production and repair applications.

Substiute Parts

L1007C221KPWST

KEMETIn Stock: 1130L1007C221KPWST Datasheet

Current PartRFQ

CBC2518T221K

Taiyo YudenIn Stock: 4711CBC2518T221K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1007C221KPWST is determined by strict equivalence across the following critical parameters:

• Inductance Value: 220 µH with ±10% tolerance
• Package / Case: 1007 (2518 Metric) surface mount form factor
• Core Material: Ferrite drum core, unshielded construction
• Operating Temperature Range: -40°C to 105°C
• Frequency Characteristics: Self-resonant frequency of 5.5 MHz
• Compliance Standards: ROHS3 compliance and MSL 1 rating

The substitute part CBC2518T221K from Taiyo Yuden meets all these core electrical and mechanical parameters. While the substitute exhibits higher current rating (110 mA versus 40 mA) and increased DC resistance (10.92 Ohm maximum versus 4.5 Ohm), these differences represent enhanced performance characteristics that do not preclude substitution in applications designed for the original part's specifications.

Parameter Comparison

Engineering Selection Recommendations

The CBC2518T221K from Taiyo Yuden is a direct substitute for the obsolete L1007C221KPWST. Both components share identical inductance values, package dimensions, core construction, and compliance certifications.

The substitute part is classified as "Not For New Designs," indicating limited long-term availability. Selection of this substitute is appropriate for replacement and repair applications where the original KEMET component is no longer obtainable. Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols.

The increased current rating and DC resistance of the substitute do not create incompatibility with circuits designed for the original part's 40 mA specification, as the substitute operates within the same electrical and thermal envelope.

Frequently Asked Questions (FAQ)

Q: Can the CBC2518T221K be used as a direct replacement for the L1007C221KPWST?

A: Yes. Both components share identical inductance values (220 µH ±10%), package dimensions (1007 / 2518 Metric), core construction (ferrite drum core, unshielded), operating temperature range (-40°C to 105°C), and self-resonant frequency (5.5 MHz). Physical and electrical compatibility is confirmed.

Q: What is the significance of the higher current rating in the substitute part?

A: The CBC2518T221K is rated for 110 mA continuous current compared to the original part's 40 mA rating. This represents a performance enhancement that does not affect substitution suitability. Circuits designed for 40 mA operation remain fully compatible with the higher-rated substitute component.

Q: Does the increased DC resistance of the substitute affect circuit performance?

A: The CBC2518T221K exhibits a maximum DC resistance of 10.92 Ohm compared to the original 4.5 Ohm specification. Circuit designers must evaluate whether this resistance increase impacts power dissipation and signal integrity in their specific application. The substitute is electrically compatible but introduces higher resistive losses.

Q: Are both parts compliant with current environmental and safety standards?

A: Yes. Both the L1007C221KPWST and CBC2518T221K are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both components meet current regulatory requirements for hazardous substance restrictions and moisture handling.

Q: What is the packaging format for the substitute part?

A: The CBC2518T221K is supplied in Tape & Reel (TR) format, which is standard for surface mount component distribution and automated assembly processes.