LD2-271-R Equivalent & Substitute Parts Reference

Part Overview

The LD2-271-R is a 270 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 940 mA continuous current with a maximum DC resistance of 1.11 Ohm and operates across the temperature range of -40°C to 125°C. The part maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent inductance values, core materials, mounting types, and operating temperature ranges align with the original specification, enabling direct functional replacement in circuit applications where current rating variations fall within acceptable design margins.

Substiute Parts

LD2-271-R

Eaton - Electronics DivisionIn Stock: 1151LD2-271-R Datasheet

Current PartRFQ

SDR0805-271KL

Bourns Inc.In Stock: 2084SDR0805-271KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LD2-271-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 270 µH (exact match required)
• Core material: Ferrite drum core, unshielded construction
• Mounting type: Surface mount configuration
• Operating temperature range: -40°C to 125°C minimum
• DC resistance: 1.11 Ohm maximum
• RoHS compliance status

Secondary Compatibility Factors:

• Current rating tolerance (substitute may have lower continuous current rating if saturation current remains adequate for application)
• Inductance tolerance (±10% to ±20% acceptable range)
• Package dimensions (nonstandard sizes must remain compatible with PCB layout)
• Moisture sensitivity level (MSL 1 required)

The SDR0805-271KL from Bourns Inc. qualifies as a substitute based on matching inductance, core type, mounting method, temperature range, DCR specification, and RoHS compliance. Current rating differences are noted for design consideration.

Parameter Comparison

Engineering Selection Recommendations

LD2-271-R Selection Criteria:

• Applications requiring 940 mA continuous current capacity
• Designs with thermal headroom for higher current ratings
• Systems where ±20% inductance tolerance is acceptable
• Active product status with established supply chain

SDR0805-271KL Selection Criteria:

• Applications with maximum continuous current requirements of 420 mA or below
• Designs benefiting from tighter ±10% inductance tolerance
• Systems where ROHS3 compliance provides additional regulatory assurance
• Circuits where saturation current of 660 mA is sufficient for peak transient conditions

Both parts maintain Active product status, full RoHS compliance, and unlimited moisture sensitivity rating. Selection between these parts depends on circuit current requirements and inductance tolerance specifications. The SDR0805-271KL offers improved inductance accuracy; the LD2-271-R provides higher continuous current capacity.

Frequently Asked Questions (FAQ)

Q: Can SDR0805-271KL replace LD2-271-R in all applications?

A: Substitution is valid only when circuit continuous current requirements do not exceed 420 mA. The SDR0805-271KL saturation current of 660 mA must be verified against peak transient current demands. Both parts share identical 270 µH inductance, 1.11 Ohm DCR, ferrite core construction, and operating temperature range.

Q: What is the significance of the inductance tolerance difference?

A: The LD2-271-R specifies ±20% tolerance while SDR0805-271KL specifies ±10%. Applications requiring tighter inductance accuracy benefit from the Bourns part. Circuits designed with ±20% tolerance margin accept either part without modification.

Q: Are there physical mounting differences between these parts?

A: Both parts are surface mount components with nonstandard package dimensions. The LD2-271-R measures 7.80mm x 7.00mm x 5.00mm (max height); the SDR0805-271KL measures 7.80mm x 7.80mm x 5.30mm (max height). PCB layout verification is required to confirm physical compatibility.

Q: Do both parts meet current environmental compliance standards?

A: Yes. The LD2-271-R is RoHS Compliant; the SDR0805-271KL is ROHS3 Compliant. Both parts are MSL 1 rated (unlimited moisture sensitivity) and suitable for standard manufacturing processes without special handling.

Q: What is the primary limiting factor for substitution?

A: Continuous current rating is the primary constraint. The LD2-271-R supports 940 mA; the SDR0805-271KL supports 420 mA. Circuit current analysis must confirm that the substitute part's current rating meets application requirements before implementation.