LD2-680-R Equivalent & Substitute Parts

Part Overview

The LD2-680-R is a 68 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is designed for applications requiring fixed inductance with a current rating of 1.88 A and maximum DC resistance of 280 mOhm. The part is active in production status and RoHS compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent inductance values, compatible package dimensions, and acceptable electrical performance parameters are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

LD2-680-R

Eaton - Electronics DivisionIn Stock: 861LD2-680-R Datasheet

Current PartRFQ

SDR0805-680KL

Bourns Inc.In Stock: 2913SDR0805-680KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LD2-680-R is based on the following criteria:

Primary Matching Parameters:

• Inductance value: 68 µH (exact match required)
• Core type: Ferrite drum core, wirewound
• Shielding configuration: Unshielded
• Mounting: Surface mount
• Operating temperature range: -40°C to 125°C minimum
• RoHS compliance status

Secondary Compatibility Parameters:

• Current rating: Substitute must support the application's maximum current requirement
• DC resistance: Substitute DCR must not exceed application thermal or efficiency limits
• Package dimensions: Physical footprint must fit PCB layout constraints
• Tolerance: Inductance tolerance must meet circuit performance specifications

The SDR0805-680KL from Bourns Inc. matches the primary parameters with equivalent inductance, core material, shielding, mounting type, and temperature range. Secondary parameters show variations in current rating (850 mA vs. 1.88 A), DC resistance (300 mOhm vs. 280 mOhm), and package dimensions that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

LD2-680-R Selection Criteria: The LD2-680-R is the primary choice when applications require a current rating of 1.88 A with maximum DC resistance of 280 mOhm. This part is active in production and RoHS compliant, supporting modern design requirements. The ±20% inductance tolerance is acceptable for applications with broader circuit specifications.

SDR0805-680KL Selection Criteria: The SDR0805-680KL from Bourns is suitable as a substitute when application current requirements do not exceed 850 mA. This part offers tighter inductance tolerance (±10%) and is ROHS3 compliant. The slightly higher DC resistance (300 mOhm) and increased package height (5.30mm vs. 5.00mm) must be verified against thermal and spatial constraints. The width dimension increases from 7.00mm to 7.80mm, requiring PCB layout confirmation.

Compliance Status: Both parts maintain active production status and meet RoHS requirements. The SDR0805-680KL carries ROHS3 compliance, representing the most current regulatory standard. Both components have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-680KL replace the LD2-680-R in all applications?

A: No. The SDR0805-680KL has a maximum current rating of 850 mA, compared to the LD2-680-R's 1.88 A rating. Substitution is only valid when the application's maximum operating current does not exceed 850 mA. Exceeding this limit will cause premature saturation and component failure.

Q: What is the impact of the different inductance tolerances?

A: The LD2-680-R has ±20% tolerance while the SDR0805-680KL has ±10% tolerance. The tighter tolerance of the Bourns part may provide better circuit performance in applications sensitive to inductance variation. However, both tolerances are within the same specification class and are interchangeable for most general-purpose filtering and impedance matching applications.

Q: Are there physical compatibility issues between these parts?

A: Yes. The SDR0805-680KL is 0.307" x 0.307" (7.80mm x 7.80mm) with 5.30mm maximum height, while the LD2-680-R is 0.307" x 0.276" (7.80mm x 7.00mm) with 5.00mm maximum height. The Bourns part is wider and taller. PCB layout and component placement must be verified before substitution to ensure no mechanical interference or thermal management issues.

Q: What is the significance of the DC resistance difference?

A: The LD2-680-R has 280 mOhm maximum DC resistance versus 300 mOhm for the SDR0805-680KL. This 20 mOhm difference results in approximately 7% higher resistive losses in the Bourns part. For applications with continuous high current operation, this may increase component temperature. Thermal analysis is required if the LD2-680-R is replaced in power-critical circuits.

Q: Are both parts suitable for the full -40°C to 125°C temperature range?

A: Yes. Both the LD2-680-R and SDR0805-680KL are rated for -40°C to 125°C operation. No temperature-related restrictions apply to substitution within this range.

Q: What does MSL 1 (Unlimited) mean for component handling?

A: MSL 1 (Unlimited) indicates that both components have no moisture sensitivity restrictions. They can be stored in standard warehouse conditions without desiccant packaging or time-limited shelf life constraints. This simplifies inventory management and reduces handling costs.

Q: Are there any ECCN or export restrictions?

A: Both parts are classified as EAR99 under the Export Administration Regulations, indicating they are not subject to specific export licensing requirements. Standard commercial export procedures apply.