LEM2520T150J Equivalent & Substitute Parts

Part Overview

The LEM2520T150J is a 15 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 140 mA maximum current with a DC resistance of 4.4 Ohm maximum. 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 alternatives for ongoing design support and procurement continuity.

Substiute Parts

LEM2520T150J

Taiyo YudenIn Stock: 8313LEM2520T150J Datasheet

Current PartRFQ

1008-153J

API Delevan Inc.In Stock: 15191008-153J Datasheet

SimilarRFQ

NLV25T-150J-EF

TDK CorporationIn Stock: 2388NLV25T-150J-EF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LEM2520T150J is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 15 µH (±5% tolerance)
• Current rating: minimum 140 mA
• DC resistance: maximum 4.4 Ohm
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Package form factor: 1008 (2520 Metric) or equivalent physical dimensions

Secondary Compatibility Factors:

• Operating temperature range must encompass or exceed the original specification
• Self-resonant frequency and Q factor characteristics
• Moisture sensitivity level: MSL 1 (Unlimited)

The substitute parts identified meet the primary matching criteria while demonstrating compatibility with the electrical and mechanical requirements of the LEM2520T150J application space.

Parameter Comparison

Engineering Selection Recommendations

NLV25T-150J-EF (TDK Corporation) - Primary Substitute

The NLV25T-150J-EF is the preferred substitute for the LEM2520T150J. This part maintains identical inductance (15 µH), current rating (140 mA), and DC resistance (4.4 Ohm maximum) specifications. Physical dimensions and package form factor (1008 / 2520 Metric) are identical to the original component. The operating temperature range extends to 105°C, providing enhanced thermal margin. The part is classified as Active with ROHS3 compliance and REACH Affected status, ensuring long-term availability and regulatory alignment. The self-resonant frequency of 26 MHz exceeds the original specification, offering improved high-frequency performance characteristics.

1008-153J (API Delevan Inc.) - Secondary Substitute

The 1008-153J provides functional equivalence with enhanced current rating (194 mA) and improved DC resistance (4 Ohm maximum). The operating temperature range of -55°C to 125°C exceeds the original specification. However, this part is classified as RoHS non-compliant and features a nonstandard package designation with physical dimensions (0.105" L x 0.095" W) that exceed the original 1008 (2520 Metric) footprint. The increased height (0.095" maximum) may present layout constraints in space-restricted applications. This substitute is suitable for applications where regulatory compliance is not a requirement and PCB layout accommodates the larger footprint.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-150J-EF be used as a direct replacement for the LEM2520T150J?

A: Yes. The NLV25T-150J-EF meets all critical electrical parameters (15 µH inductance, 140 mA current rating, 4.4 Ohm DC resistance) and maintains identical physical dimensions and package form factor (1008 / 2520 Metric). PCB layout and assembly processes require no modification.

Q: What are the key differences between the two substitute parts?

A: The NLV25T-150J-EF (TDK) maintains exact electrical and physical specifications with Active product status and ROHS3 compliance. The 1008-153J (API Delevan) offers higher current rating (194 mA) and lower DC resistance (4 Ohm) but features a nonstandard package with larger physical dimensions (0.105" L x 0.095" W) and is RoHS non-compliant.

Q: Does the 1008-153J fit the same PCB footprint as the original part?

A: No. The 1008-153J has physical dimensions of 0.105" L x 0.095" W compared to the original 0.098" L x 0.079" W. The increased height of 0.095" (versus 0.079" original) may cause clearance issues in space-constrained designs. PCB layout verification is required before implementation.

Q: Are there temperature range considerations for substitute selection?

A: The original LEM2520T150J operates from -40°C to 85°C. The NLV25T-150J-EF extends this to -40°C to 105°C, providing additional thermal margin. The 1008-153J operates from -55°C to 125°C. Both substitutes accommodate the original temperature specification with enhanced capability.

Q: What is the impact of the different self-resonant frequencies?

A: The original part specifies 20 MHz self-resonant frequency. The NLV25T-150J-EF operates at 26 MHz and the 1008-153J at 21 MHz. Higher self-resonant frequency indicates improved high-frequency performance characteristics. Both substitutes remain suitable for applications designed around the original 20 MHz specification.

Q: How do the Q factor values compare?

A: The original LEM2520T150J and NLV25T-150J-EF both specify Q of 25 at 2.52 MHz. The 1008-153J specifies Q of 30 at 2.5 MHz, indicating slightly superior quality factor performance. All values are measured at equivalent frequencies within the 2.5 MHz to 2.52 MHz range.

Q: What compliance certifications should be considered?

A: The NLV25T-150J-EF is ROHS3 compliant with REACH Affected status, suitable for regulated markets. The 1008-153J is RoHS non-compliant, limiting use in applications requiring regulatory compliance. Both parts are REACH Unaffected or REACH Affected as specified, with EAR99 ECCN classification.

Q: Is inventory availability a factor in substitute selection?

A: The NLV25T-150J-EF has 2345 pieces in stock with Active product status, ensuring long-term availability. The 1008-153J has 1506 pieces available. The original LEM2520T150J, though obsolete, has 8300 pieces in current inventory. Procurement strategy should prioritize the Active status substitute for future design cycles.