LEM2520TR68K Equivalent & Substitute Parts

Part Overview

The LEM2520TR68K is a 680 nH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 300 mA continuous current with a maximum DC resistance of 850mOhm. This component is packaged in a 1008 (2520 Metric) surface mount form factor and operates across the temperature range of -40°C to 85°C. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

LEM2520TR68K

Taiyo YudenIn Stock: 3129LEM2520TR68K Datasheet

Current PartRFQ

CW252016-R68G

Bourns Inc.In Stock: 660CW252016-R68G Datasheet

DirectRFQ

CW252016-R68J

Bourns Inc.In Stock: 6224CW252016-R68J Datasheet

DirectRFQ

1008-681K

API Delevan Inc.In Stock: 7881008-681K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LEM2520TR68K is determined by the following critical parameters: inductance value (680 nH), package form factor (1008 / 2520 Metric), surface mount mounting type, unshielded configuration, and operating temperature compatibility. The substitute parts identified maintain the same inductance specification and physical package dimensions, ensuring mechanical and electrical compatibility within the circuit board layout.

The substitute parts are grouped into two categories based on their relationship to the main part:

Direct Manufacturer Substitutes (Bourns CW252016 Series): These parts maintain identical inductance values and package specifications while offering enhanced electrical performance characteristics and active product status.

Similar Manufacturer Substitute (API Delevan 1008-681K): This part maintains the same inductance and package type but differs in core material, DC resistance, and current rating specifications.

Parameter Comparison

Engineering Selection Recommendations

CW252016-R68G and CW252016-R68J (Bourns Inc.): These direct manufacturer substitutes are recommended as primary alternatives to the obsolete LEM2520TR68K. Both parts maintain identical inductance specifications and standard 1008 (2520 Metric) package dimensions. The Bourns CW252016 series offers active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The CW252016-R68G provides tighter inductance tolerance (±2%) compared to the original part, while the CW252016-R68J offers intermediate tolerance (±5%). Both variants support higher current ratings (400 mA) and extended operating temperature ranges (-40°C to 125°C) relative to the original specification. The increased DC resistance (1.55Ohm Max) must be evaluated against circuit requirements where the original 850mOhm specification was critical.

1008-681K (API Delevan Inc.): This substitute maintains the same inductance value and unshielded configuration but operates with a nonstandard package form factor and ferrite core material. The part offers superior current handling capability (760 mA) and significantly lower DC resistance (260mOhm Max), making it suitable for applications requiring enhanced power delivery. However, the nonstandard package dimensions (0.105" L x 0.095" W versus 0.098" L x 0.079" W) and increased height (0.095" versus 0.079") may require board layout modifications. The RoHS non-compliant status limits applicability in regulated environments. This substitute is appropriate for legacy system maintenance or applications where regulatory compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can the CW252016-R68G or CW252016-R68J be used as direct drop-in replacements for the LEM2520TR68K?

A: The Bourns CW252016 series maintains identical inductance values and standard 1008 (2520 Metric) package dimensions, enabling mechanical compatibility. The reduced height (0.071" versus 0.079") provides additional clearance margin. However, the increased DC resistance (1.55Ohm Max versus 850mOhm Max) and higher current ratings (400 mA versus 300 mA) require circuit-level evaluation to confirm electrical compatibility with the original design specifications.

Q: What is the difference between CW252016-R68G and CW252016-R68J?

A: Both parts are identical in electrical performance and physical dimensions. The primary distinction is inductance tolerance: CW252016-R68G specifies ±2% tolerance, while CW252016-R68J specifies ±5% tolerance. Selection depends on circuit requirements for inductance accuracy. The CW252016-R68G is preferred for applications requiring tighter tolerance control.

Q: Is the 1008-681K suitable for all applications requiring the LEM2520TR68K?

A: The 1008-681K maintains the same 680 nH inductance and unshielded configuration but differs significantly in package form factor, core material, and DC resistance. The nonstandard package dimensions require board layout verification. The lower DC resistance (260mOhm Max) and higher current rating (760 mA) make this part suitable for high-current applications but may introduce unintended circuit behavior in designs optimized for the original 850mOhm specification. The RoHS non-compliant status restricts use in regulated applications.

Q: What are the compliance and regulatory considerations for these substitutes?

A: The Bourns CW252016 series (CW252016-R68G and CW252016-R68J) are ROHS3 compliant with active product status, ensuring regulatory alignment and long-term availability. The API Delevan 1008-681K is RoHS non-compliant and suitable only for applications where regulatory compliance is not required. All parts maintain REACH Unaffected status and EAR99 export classification.

Q: How do the operating temperature ranges compare?

A: The LEM2520TR68K operates from -40°C to 85°C. Both Bourns CW252016 variants extend this range to -40°C to 125°C, providing enhanced thermal margin. The API Delevan 1008-681K offers the widest range (-55°C to 125°C), suitable for extended temperature applications. Selection depends on the target operating environment specifications.

Q: Are there inventory considerations for these substitutes?

A: The Bourns CW252016-R68J maintains the highest inventory level (6118 pieces), followed by CW252016-R68G (632 pieces) and 1008-681K (722 pieces). The original LEM2520TR68K has 3100 pieces in stock. Inventory availability should be confirmed with the component supplier for production requirements.