LD2-181-R Equivalent & Substitute Parts

Part Overview

The LD2-181-R is a 180 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.15 A continuous current with a maximum DC resistance of 710mOhm and operates across the temperature range of -40°C to 125°C. The part is currently active in production and RoHS compliant, making it suitable for modern electronic applications requiring fixed inductance filtering, energy storage, or signal conditioning in compact form factors.

Substitute parts are identified when equivalent inductance values, core materials, mounting types, and operating temperature ranges align with the main part specifications, while accounting for acceptable variations in current ratings, DC resistance, and tolerance specifications.

Substiute Parts

LD2-181-R

Eaton - Electronics DivisionIn Stock: 1025LD2-181-R Datasheet

Current PartRFQ

SDR0805-181KL

Bourns Inc.In Stock: 3391SDR0805-181KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LD2-181-R is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 180 µH (exact match required)
• Core type: Drum core, wirewound ferrite (exact match required)
• Shielding configuration: Unshielded (exact match required)
• Mounting type: Surface mount (exact match required)
• Operating temperature range: -40°C to 125°C minimum (exact match or wider range acceptable)

Secondary Tolerance Parameters:

• Current rating: Substitute must support minimum 510 mA (acceptable if lower than main part, provided application requirements are met)
• DC resistance: Substitute DCR up to 770mOhm acceptable (within engineering tolerance for this category)
• Tolerance: ±10% to ±20% acceptable (tighter tolerance acceptable)

The SDR0805-181KL from Bourns Inc. meets all primary matching criteria and falls within acceptable secondary parameter ranges for this product category.

Parameter Comparison

Engineering Selection Recommendations

LD2-181-R Selection Criteria: The LD2-181-R is appropriate for applications requiring the full 1.15 A current rating. This part carries RoHS compliance certification and MSL Level 1 rating, suitable for standard manufacturing and storage conditions without moisture sensitivity constraints.

SDR0805-181KL Selection Criteria: The SDR0805-181KL is appropriate for applications where the 510 mA current rating is sufficient. This part carries ROHS3 compliance certification and MSL Level 1 rating. The tighter ±10% inductance tolerance may provide improved circuit performance in applications sensitive to inductance variation. The slightly higher DC resistance (770mOhm vs. 710mOhm) represents a 60mOhm differential and should be evaluated against specific thermal and efficiency requirements.

Both parts are active products with established supply chains and are suitable for new design implementations.

Frequently Asked Questions (FAQ)

Q: Can SDR0805-181KL replace LD2-181-R in all applications?

A: Substitution is valid only when the application current requirement does not exceed 510 mA. The SDR0805-181KL saturation current of 800 mA limits its use to circuits operating below this threshold. If the circuit requires the full 1.15 A rating of the LD2-181-R, substitution is not appropriate.

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

A: The LD2-181-R has a maximum DC resistance of 710mOhm, while the SDR0805-181KL is specified at 770mOhm maximum. This 60mOhm difference results in approximately 8.5% higher resistive losses in the substitute part. For low-current applications, this difference is typically negligible. For applications operating near the 510 mA rating of the SDR0805-181KL, thermal dissipation should be evaluated.

Q: Are the physical dimensions compatible?

A: Both parts are surface mount components with similar footprints. The LD2-181-R measures 0.307" L x 0.276" W x 0.197" H (7.80mm x 7.00mm x 5.00mm). The SDR0805-181KL measures 0.307" L x 0.307" W x 0.209" H (7.80mm x 7.80mm x 5.30mm). The width and height differences are minimal and typically accommodate standard PCB land patterns for both parts.

Q: What does the ±10% tolerance of SDR0805-181KL offer compared to ±20% of LD2-181-R?

A: The ±10% tolerance specification of the SDR0805-181KL provides tighter inductance control, resulting in more consistent circuit performance across production batches. Applications with strict frequency response or impedance matching requirements may benefit from this tighter tolerance.

Q: Are both parts suitable for high-temperature applications?

A: Both parts operate across the identical temperature range of -40°C to 125°C. Neither part offers extended temperature capability beyond this range.