LD1-151-R Equivalent & Substitute Parts Reference

Part Overview

The LD1-151-R is a 150 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 290 mA continuous current with a maximum DC resistance of 2.68 Ohm and operates across the temperature range of -40°C to 125°C. The part is RoHS Compliant and carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. As an active product with established inventory availability, the LD1-151-R serves applications requiring fixed inductance in compact nonstandard packages. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified tolerance ranges.

Substiute Parts

LD1-151-R

Eaton - Electronics DivisionIn Stock: 852LD1-151-R Datasheet

Current PartRFQ

SDR0403-151KL

Bourns Inc.In Stock: 140387SDR0403-151KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LD1-151-R is determined by strict equivalence across the following critical parameters:

Inductance Value: Both main and substitute parts must maintain 150 µH with ±10% tolerance to ensure circuit performance consistency.

Current Rating: The substitute part must support the application's current requirements. The LD1-151-R is rated for 290 mA continuous current; substitute parts with equal or higher current ratings are acceptable.

DC Resistance (DCR): Maximum DCR of 2.68 Ohm establishes the thermal and power loss profile. Substitute parts with DCR at or below this specification maintain equivalent thermal performance.

Core Material and Shielding: Both parts utilize ferrite drum core construction with unshielded configuration, ensuring electromagnetic behavior consistency.

Physical Dimensions: Identical footprint (4.50 x 4.00 x 3.50 mm) and surface mount mounting type confirm mechanical compatibility.

Operating Temperature Range: Both parts operate across -40°C to 125°C, supporting equivalent environmental specifications.

Compliance and Certifications: RoHS compliance and MSL 1 rating ensure regulatory and manufacturing process compatibility.

The SDR0403-151KL from Bourns Inc. meets these substitution criteria with matching inductance, core material, shielding, dimensions, temperature range, and compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Part - LD1-151-R (Eaton): Select this part when the application requires the full 290 mA current rating and the lower 2.68 Ohm maximum DC resistance specification. The LD1-151-R is an active product with established supply (767 pcs in stock) and RoHS Compliant certification.

Substitute Part - SDR0403-151KL (Bourns): This part is suitable as a substitute when the application current requirement does not exceed 260 mA and the higher 3.4 Ohm maximum DC resistance is acceptable for the thermal budget. The SDR0403-151KL carries ROHS3 Compliant certification and demonstrates significantly higher inventory availability (140,300 pcs in stock). Both parts maintain identical inductance value, tolerance, saturation current, physical dimensions, temperature range, and MSL rating.

Compliance Basis: Both parts satisfy RoHS requirements and carry MSL 1 (Unlimited) ratings, confirming compatibility with standard manufacturing and storage processes. Selection between these parts depends solely on current rating and DC resistance requirements specific to the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-151KL replace the LD1-151-R in all applications?

A: The SDR0403-151KL is a suitable substitute only when the application current requirement does not exceed 260 mA (the substitute's continuous current rating). The LD1-151-R supports 290 mA. Additionally, the substitute's higher DC resistance (3.4 Ohm vs. 2.68 Ohm) results in increased power dissipation; verify that the thermal design accommodates this difference.

Q: What is the significance of the different DC resistance values?

A: DC resistance directly affects power loss in the inductor. The LD1-151-R dissipates less power due to its lower 2.68 Ohm maximum resistance. The SDR0403-151KL, with 3.4 Ohm maximum resistance, will generate approximately 27% more heat at equivalent current levels. Circuit thermal analysis must confirm acceptability.

Q: Are the physical dimensions identical?

A: Yes. Both the LD1-151-R and SDR0403-151KL measure 4.50 x 4.00 x 3.50 mm (L x W x H), confirming identical PCB footprint and mounting compatibility.

Q: Do both parts have the same inductance tolerance?

A: Yes. Both parts carry ±10% inductance tolerance at the specified test frequency, ensuring equivalent circuit performance predictability.

Q: What is the difference in saturation current specifications?

A: Both parts specify 400 mA saturation current (Isat), indicating identical core saturation behavior. This parameter is independent of the continuous current rating difference.

Q: Are there compliance differences between these parts?

A: The LD1-151-R is RoHS Compliant; the SDR0403-151KL is ROHS3 Compliant. Both certifications satisfy RoHS requirements. Both parts carry MSL 1 (Unlimited) ratings, confirming no moisture sensitivity restrictions.

Q: Which part should be selected for new designs?

A: For new designs, select based on application current requirements. If the circuit requires the full 290 mA rating or demands the lower 2.68 Ohm DCR specification, use the LD1-151-R. If the application current is ≤260 mA and thermal dissipation from 3.4 Ohm DCR is acceptable, the SDR0403-151KL offers higher inventory availability.