L1007C221MPWST Equivalent & Substitute Parts

Part Overview

The L1007C221MPWST 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 35 mA continuous current with a DC resistance of 4.5 Ohm 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.

Substiute Parts

L1007C221MPWST

KEMETIn Stock: 967L1007C221MPWST Datasheet

Current PartRFQ

CBC2518T221M

Taiyo YudenIn Stock: 2239CBC2518T221M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1007C221MPWST is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 220 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: 5.5 MHz
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Allowable Variation Parameters:

• Current rating: Substitute parts may exceed the 35 mA rating of the main part
• DC resistance: Substitute parts may vary within acceptable circuit performance limits
• Product status: Substitute parts may have different lifecycle status

The CBC2518T221M from Taiyo Yuden meets all mandatory matching parameters and is therefore classified as an equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The CBC2518T221M is a direct functional equivalent to the L1007C221MPWST for applications requiring 220 µH inductance in the 1007 (2518 Metric) surface mount package. Both components share identical inductance values, tolerances, core materials, package dimensions, and operating temperature ranges. Both are ROHS3 compliant with MSL rating 1.

The CBC2518T221M provides a higher current rating of 110 mA compared to the 35 mA rating of the L1007C221MPWST, making it suitable for circuits operating at or below the original 35 mA specification. The increased DC resistance of 10.92 Ohm (maximum) in the CBC2518T221M versus 4.5 Ohm in the L1007C221MPWST must be evaluated for circuit impact, particularly in applications sensitive to resistive losses.

Both parts are classified outside active production status (Obsolete and Not For New Designs, respectively), indicating limited long-term availability. For new designs, consultation of current manufacturer catalogs for active production alternatives in the 220 µH, 1007 package category is advised.

Frequently Asked Questions (FAQ)

Q: Can the CBC2518T221M replace the L1007C221MPWST in existing designs?

A: The CBC2518T221M is electrically and mechanically compatible as a substitute. Both components have identical inductance (220 µH), tolerance (±20%), package (1007 / 2518 Metric), core type (ferrite drum core wirewound), and operating temperature range (-40°C to 105°C). Circuit performance must account for the difference in DC resistance: 4.5 Ohm (L1007C221MPWST) versus 10.92 Ohm maximum (CBC2518T221M).

Q: What is the significance of the higher current rating in the CBC2518T221M?

A: The CBC2518T221M is rated for 110 mA continuous current, compared to 35 mA for the L1007C221MPWST. This higher rating indicates the substitute part can safely operate at the original part's 35 mA specification with additional thermal margin. The higher rating does not affect compatibility for circuits designed to the original 35 mA limit.

Q: Are there packaging differences between these parts?

A: Both the L1007C221MPWST and CBC2518T221M 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). They are mechanically interchangeable on PCB layouts designed for this package.

Q: What does the product status difference mean?

A: The L1007C221MPWST is classified as Obsolete, indicating it is no longer manufactured. The CBC2518T221M is classified as Not For New Designs, indicating limited or discontinued production. Both parts have restricted availability. For new product development, active production alternatives should be sourced from current manufacturer catalogs.

Q: Are both parts RoHS compliant?

A: Yes. Both the L1007C221MPWST and CBC2518T221M are ROHS3 compliant and carry MSL rating 1 (Unlimited moisture sensitivity level), meeting environmental and reliability standards for industrial and commercial applications.

Q: How does the DC resistance difference affect circuit performance?

A: The CBC2518T221M has a maximum DC resistance of 10.92 Ohm compared to 4.5 Ohm for the L1007C221MPWST. This 6.42 Ohm difference results in increased resistive losses and heat generation at the same current levels. Circuit designs sensitive to inductor losses, efficiency, or thermal performance must evaluate this parameter for compatibility.