LD1-1R0-R Equivalent & Substitute Parts

Part Overview

The LD1-1R0-R is a 1 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 2.66 A continuous current with a maximum DC resistance of 33 mOhm and operates across the temperature range of -40°C to 125°C. The part is Active in product status and RoHS Compliant, making it suitable for modern electronic applications requiring compact inductance solutions. Substitute parts are identified when equivalent electrical and mechanical specifications are available from alternative manufacturers, enabling supply chain flexibility and inventory optimization.

Substiute Parts

LD1-1R0-R

Eaton - Electronics DivisionIn Stock: 2707LD1-1R0-R Datasheet

Current PartRFQ

SDR0403-1R0ML

Bourns Inc.In Stock: 25489SDR0403-1R0ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LD1-1R0-R is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 1 µH
• Inductance tolerance: ±20%
• DC resistance: 33 mOhm maximum
• Core type: Ferrite, unshielded drum core
• Mounting type: Surface mount
• Package footprint: 4.50mm x 4.00mm length and width
• Operating temperature range: -40°C to 125°C minimum
• RoHS compliance status

The SDR0403-1R0ML from Bourns Inc. meets all critical electrical specifications and mechanical constraints. While the substitute part exhibits higher current rating (3.8 A versus 2.66 A) and saturation current (5.5 A versus 4.46 A), these represent performance enhancements that do not compromise compatibility. The slight height difference (3.50mm versus 3.20mm) remains within typical PCB assembly tolerances for nonstandard packages.

Parameter Comparison

Engineering Selection Recommendations

LD1-1R0-R (Eaton - Electronics Division):

• Primary selection when Eaton component availability and supply chain continuity are prioritized
• Active product status ensures ongoing manufacturer support
• RoHS Compliant certification meets environmental and regulatory requirements
• Established inventory of 2650 pieces supports immediate procurement

SDR0403-1R0ML (Bourns Inc.):

• Direct substitute when supply chain diversification is required
• Active product status with enhanced ROHS3 Compliant certification
• Superior current handling capability (3.8 A versus 2.66 A) provides design margin
• Larger available inventory (25400 pieces) supports high-volume production requirements
• Identical electrical specifications and mechanical footprint ensure drop-in compatibility

Both parts are Active products with full regulatory compliance. Selection between them is determined by supplier availability, inventory requirements, and supply chain strategy rather than technical performance limitations.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-1R0ML replace the LD1-1R0-R in existing designs?

A: Yes. The SDR0403-1R0ML is a direct substitute. Both parts share identical inductance (1 µH), tolerance (±20%), DC resistance (33 mOhm maximum), core material (ferrite), shielding (unshielded), mounting type (surface mount), and package footprint (4.50mm x 4.00mm). The substitute part's higher current rating and saturation current represent performance enhancements that do not affect compatibility.

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

A: The LD1-1R0-R has a maximum seated height of 3.20mm, while the SDR0403-1R0ML measures 3.50mm. This 0.30mm variance is within standard PCB assembly tolerances for nonstandard packages and does not typically require design modifications. Verify clearance in your specific application if height-constrained layouts are present.

Q: Are both parts RoHS compliant?

A: Yes. The LD1-1R0-R is RoHS Compliant. The SDR0403-1R0ML carries ROHS3 Compliant certification, which represents an enhanced compliance standard. Both parts meet environmental and regulatory requirements for modern electronics manufacturing.

Q: What are the key electrical parameters that determine substitutability?

A: Substitutability is determined by inductance value (1 µH), inductance tolerance (±20%), DC resistance (33 mOhm maximum), core material (ferrite), and shielding type (unshielded). Both parts match these specifications exactly. Current rating differences are compatible because the substitute part provides higher capability.

Q: Can I use these parts interchangeably in high-current applications?

A: The SDR0403-1R0ML is preferred for applications approaching or exceeding 2.66 A, as it is rated for 3.8 A continuous current with a saturation current of 5.5 A. The LD1-1R0-R is suitable for applications within its 2.66 A rating. Both parts operate across the same temperature range (-40°C to 125°C).

Q: What packaging format is used for both parts?

A: Both the LD1-1R0-R and SDR0403-1R0ML are supplied in Tape & Reel (TR) format, suitable for automated assembly processes and high-volume production environments.