LD2-820-R Equivalent & Substitute Parts

Part Overview

The LD2-820-R is a 82 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.63 A continuous current with a maximum DC resistance of 370 mOhm 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 power management circuits.

Equivalent and substitute parts are identified when design requirements permit tolerance in current rating, inductance tolerance, or physical dimensions while maintaining core electrical performance and thermal operating range.

Substiute Parts

LD2-820-R

Eaton - Electronics DivisionIn Stock: 907LD2-820-R Datasheet

Current PartRFQ

SDR0805-820KL

Bourns Inc.In Stock: 1948SDR0805-820KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LD2-820-R with the SDR0805-820KL is permissible based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Inductance value: Both 82 µH
• Core material: Both ferrite drum core, wirewound, unshielded
• DC resistance: Both 370 mOhm maximum
• Operating temperature range: Both -40°C to 125°C
• Mounting type: Both surface mount
• Saturation current: Both within acceptable range (1.28 A vs 1.2 A)
• RoHS compliance: Both compliant
• Moisture sensitivity: Both MSL 1

Allowable Variations:

• Inductance tolerance: LD2-820-R ±20% vs SDR0805-820KL ±10% (substitute has tighter tolerance)
• Current rating: LD2-820-R 1.63 A vs SDR0805-820KL 780 mA (substitute rated lower; applicable only in circuits where operating current does not exceed 780 mA)
• Physical dimensions: Minor differences in length, width, and height within nonstandard package classifications

Parameter Comparison

Engineering Selection Recommendations

Primary Part (LD2-820-R): Select the LD2-820-R when circuit design requires the full 1.63 A current rating and RoHS compliance is mandatory. This part is active in production with established supply availability.

Substitute Part (SDR0805-820KL): The SDR0805-820KL from Bourns Inc. is suitable as a substitute when all of the following conditions are met:

• Operating current in the circuit does not exceed 780 mA
• Tighter inductance tolerance (±10%) is acceptable or beneficial to circuit performance
• ROHS3 compliance satisfies regulatory requirements
• Physical dimensions (0.307" L x 0.307" W x 0.209" H) fit the PCB layout

Both parts maintain identical DC resistance, core material, shielding configuration, and operating temperature range, ensuring equivalent thermal and electromagnetic performance within their respective current ratings.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-820KL replace the LD2-820-R in all applications?

A: No. The SDR0805-820KL has a lower current rating of 780 mA compared to the LD2-820-R at 1.63 A. Substitution is valid only when the circuit's operating current remains below 780 mA. Exceeding this threshold will cause the substitute part to saturate prematurely and degrade circuit performance.

Q: What is the difference in inductance tolerance between these parts?

A: The LD2-820-R has ±20% tolerance, while the SDR0805-820KL has ±10% tolerance. The substitute part offers tighter tolerance control, which may improve circuit stability in applications sensitive to inductance variation.

Q: Are the physical dimensions compatible with the same PCB footprint?

A: Both parts are nonstandard package surface mount inductors with similar but not identical dimensions. The LD2-820-R measures 0.307" L x 0.276" W x 0.197" H, while the SDR0805-820KL measures 0.307" L x 0.307" W x 0.209" H. Verify PCB layout clearances before substitution.

Q: Do both parts meet current environmental compliance standards?

A: Yes. The LD2-820-R is RoHS compliant, and the SDR0805-820KL is ROHS3 compliant. Both are MSL 1 rated with unlimited moisture sensitivity protection. Both carry EAR99 export classification.

Q: What is the saturation current difference, and does it matter?

A: The LD2-820-R has Isat of 1.28 A, while the SDR0805-820KL has Isat of 1.2 A. This 0.08 A difference is minor and both parts will saturate at similar operating points. However, the lower saturation current of the substitute reinforces the requirement that operating current not exceed 780 mA.

Q: Can I use the SDR0805-820KL if my circuit occasionally draws 1.0 A?

A: No. The SDR0805-820KL is rated for continuous operation at 780 mA maximum. Operating at 1.0 A exceeds the part's current rating and will cause accelerated degradation and potential failure.