L1007C330MPWIT Equivalent & Substitute Parts

Part Overview

The L1007C330MPWIT is a 33 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 1.5Ω DC resistance and operates across the temperature range of −40°C to 105°C.

The L1007C330MPWIT carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Key Parameters

Parameter	Value
Inductance	33 µH
Inductance Tolerance	±20%
Current Rating	170 mA
DC Resistance (DCR)	1.5Ω
Core Type	Ferrite, Drum Core, Wirewound
Shielding	Unshielded
Package / Case	1007 (2518 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	−40°C to 105°C
Frequency - Self Resonant	15 MHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the L1007C330MPWIT are identified based on strict electrical and mechanical compatibility criteria. The following parameters must align for a part to function as a direct substitute:

Critical Matching Parameters:

Inductance value: 33 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: 15 MHz
Inductance test frequency: 2.52 MHz

Allowable Parameter Variations: Substitute parts may exceed the current rating and DC resistance specifications of the main part, provided all critical matching parameters are maintained. Higher current ratings and lower DC resistance values represent improved performance characteristics within the same package footprint and electrical classification.

Parameter Comparison

Parameter	L1007C330MPWIT (KEMET)	CBC2518T330M (Taiyo Yuden)
Inductance	33 µH	33 µH
Inductance Tolerance	±20%	±20%
Current Rating (Amps)	170 mA	320 mA
DC Resistance (DCR)	1.5Ω	1.95Ω Max
Current - Saturation (Isat)	Not specified	270 mA
Core Type	Ferrite, Drum Core, Wirewound	Ferrite, Drum Core, Wirewound
Shielding	Unshielded	Unshielded
Package / Case	1007 (2518 Metric)	1007 (2518 Metric)
Size / Dimension	0.098" L x 0.071" W (2.50mm x 1.80mm)	0.098" L x 0.071" W (2.50mm x 1.80mm)
Height - Seated (Max)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature Range	−40°C to 105°C	−40°C to 105°C
Frequency - Self Resonant	15 MHz	15 MHz
Inductance Frequency - Test	2.52 MHz	2.52 MHz
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The CBC2518T330M manufactured by Taiyo Yuden is a direct functional substitute for the obsolete L1007C330MPWIT. Both components share identical inductance values, tolerances, package dimensions, and operating temperature specifications. The CBC2518T330M provides enhanced current handling capability at 320 mA compared to the 170 mA rating of the original part, with a specified saturation current of 270 mA.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity classification (MSL 1), ensuring compatibility with standard surface mount assembly processes and environmental requirements.

The CBC2518T330M carries a "Not For New Designs" product status, indicating it remains available for replacement and legacy support applications. Selection of this substitute part is appropriate for applications requiring continuity with the L1007C330MPWIT specification.

Frequently Asked Questions (FAQ)

Q: Can the CBC2518T330M replace the L1007C330MPWIT in existing designs?

A: Yes. Both inductors share identical inductance values (33 µH), tolerances (±20%), package dimensions (1007 / 2518 Metric), and operating temperature ranges (−40°C to 105°C). The CBC2518T330M provides equivalent electrical performance with higher current rating capability.

Q: What is the difference in current rating between these parts?

A: The L1007C330MPWIT is rated for 170 mA continuous current, while the CBC2518T330M is rated for 320 mA. The CBC2518T330M also specifies a saturation current (Isat) of 270 mA. Applications operating at or below 170 mA will function identically with either part.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 1007 (2518 Metric) package with dimensions of 0.098" L × 0.071" W (2.50mm × 1.80mm) and maximum seated height of 0.079" (2.00mm). PCB footprints and assembly processes are interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the L1007C330MPWIT and CBC2518T330M are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity). Both are suitable for standard surface mount assembly and environmental requirements.

Q: What is the DC resistance difference?

A: The L1007C330MPWIT specifies 1.5Ω DC resistance, while the CBC2518T330M specifies 1.95Ω maximum. This difference reflects the design trade-off for the higher current rating in the Taiyo Yuden part.

Q: Are there any frequency or resonance differences?

A: No. Both inductors share identical self-resonant frequency (15 MHz) and inductance test frequency (2.52 MHz) specifications.

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