L1007C101MDWIT Equivalent & Substitute Parts

Part Overview

The L1007C101MDWIT is a 100 µH unshielded drum core wirewound inductor manufactured by KEMET in the 1007 (2518 Metric) surface mount package. This component is rated for 170 mA continuous current with a DC resistance of 3.7 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 production and maintenance applications.

Substiute Parts

L1007C101MDWIT

KEMETIn Stock: 912L1007C101MDWIT Datasheet

Current PartRFQ

CBC2518T101M

Taiyo YudenIn Stock: 1319CBC2518T101M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1007C101MDWIT is determined by strict equivalence across the following critical parameters:

• Inductance Value: 100 µH with ±20% tolerance
• Current Rating: 170 mA continuous current capability
• Current - Saturation (Isat): 160 mA minimum
• Package / Case: 1007 (2518 Metric) surface mount form factor
• Core Type: Ferrite drum core, wirewound construction
• Shielding Configuration: Unshielded
• Operating Temperature Range: -40°C to 105°C
• Self Resonant Frequency: 9 MHz
• Compliance: ROHS3 compliant, MSL 1

The DC resistance parameter may vary within acceptable limits provided all other electrical and mechanical specifications are maintained. Substitute parts must be pin-compatible and functionally interchangeable without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The CBC2518T101M manufactured by Taiyo Yuden is a direct functional equivalent to the obsolete L1007C101MDWIT. Both components share identical inductance values, current ratings, saturation characteristics, package dimensions, and operating temperature specifications. Both parts maintain ROHS3 compliance and MSL 1 ratings.

The primary difference between the two parts is the DC resistance specification. The L1007C101MDWIT specifies 3.7 Ohm, while the CBC2518T101M specifies 4.81 Ohm maximum. This variance falls within acceptable tolerances for most applications utilizing 100 µH inductors in this current class.

The CBC2518T101M is classified as "Not For New Designs," indicating that Taiyo Yuden has discontinued active development of this part. However, it remains functionally suitable for replacement in existing designs where the L1007C101MDWIT is no longer available.

Frequently Asked Questions (FAQ)

Q: Can the CBC2518T101M be used as a direct replacement for the L1007C101MDWIT?

A: Yes. Both components are 100 µH inductors with identical current ratings (170 mA), saturation characteristics (160 mA), package dimensions (1007/2518 Metric), and operating temperature ranges (-40°C to 105°C). The DC resistance difference (3.7 Ohm versus 4.81 Ohm maximum) does not prevent functional substitution in standard applications.

Q: What is the significance of the DC resistance difference between these parts?

A: The L1007C101MDWIT has a nominal DC resistance of 3.7 Ohm, while the CBC2518T101M specifies a maximum of 4.81 Ohm. This 1.11 Ohm difference represents approximately 30% higher resistance in the substitute part. Applications sensitive to inductor losses or thermal dissipation must evaluate this parameter against circuit requirements.

Q: Are both parts compatible with the same PCB footprint?

A: Yes. Both the L1007C101MDWIT and CBC2518T101M use the 1007 (2518 Metric) surface mount 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). No PCB layout modifications are required.

Q: What is the difference between "Obsolete" and "Not For New Designs" product status?

A: The L1007C101MDWIT is classified as obsolete, indicating that KEMET has discontinued manufacturing and no longer supports this part. The CBC2518T101M is classified as "Not For New Designs," indicating that Taiyo Yuden has ceased active development but may maintain limited inventory. For new designs, alternative suppliers should be evaluated; for existing designs requiring replacement stock, the CBC2518T101M remains available.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the L1007C101MDWIT and CBC2518T101M are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both parts are suitable for applications requiring RoHS compliance.

Q: What is the self-resonant frequency, and why is it relevant?

A: Both parts have a self-resonant frequency of 9 MHz. This parameter defines the frequency at which the inductor transitions from inductive to capacitive behavior due to parasitic capacitance. At frequencies approaching or exceeding 9 MHz, the inductor's impedance characteristics change. Applications operating near or above this frequency must account for this behavior.