LD2-390-R Equivalent & Substitute Parts

Part Overview

The LD2-390-R is a 39 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 2.42 A and maximum DC resistance of 160mOhm. The part is active in production status and available in tape and reel packaging. Substitute parts are identified when equivalent inductance values, core materials, and electrical characteristics align within acceptable tolerance ranges for the intended application circuit.

Substiute Parts

LD2-390-R

Eaton - Electronics DivisionIn Stock: 1061LD2-390-R Datasheet

Current PartRFQ

SDR0805-390KL

Bourns Inc.In Stock: 5444SDR0805-390KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LD2-390-R is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 39 µH (exact match required)
• Core type: Ferrite drum core, wirewound
• Shielding configuration: Unshielded
• Mounting: Surface mount
• DC resistance: 160mOhm maximum

Secondary Compatibility Factors:

• Operating temperature range: -40°C to 125°C minimum
• RoHS compliance status
• Current rating and saturation current characteristics
• Package dimensions and height constraints

The SDR0805-390KL from Bourns Inc. qualifies as a substitute based on matching inductance value, core material, shielding type, and mounting configuration. Differences in current rating (1.1 A vs. 2.42 A) and tolerance (±10% vs. ±20%) must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

LD2-390-R Selection Criteria:

• Applications requiring current ratings up to 2.42 A
• Circuits tolerating ±20% inductance tolerance
• Designs with PCB space constraints favoring the smaller 7.80mm x 7.00mm footprint
• RoHS Compliant supply chain requirements

SDR0805-390KL Selection Criteria:

• Applications with current requirements up to 1.1 A
• Designs benefiting from tighter ±10% inductance tolerance
• Circuits where ROHS3 compliance is specified
• Designs accommodating the 7.80mm x 7.80mm footprint and 5.30mm maximum height

Both parts maintain identical operating temperature ranges (-40°C to 125°C) and equivalent DC resistance specifications (160mOhm maximum). Selection between these parts depends on circuit current demands and tolerance requirements rather than thermal or resistance characteristics.

Frequently Asked Questions (FAQ)

Q: Can SDR0805-390KL replace LD2-390-R in all applications?

A: Substitution is valid only when circuit current requirements do not exceed 1.1 A. The LD2-390-R supports higher current operation at 2.42 A. If the application draws current above 1.1 A, the SDR0805-390KL will not function as an equivalent substitute.

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

A: The LD2-390-R carries ±20% tolerance while the SDR0805-390KL carries ±10% tolerance. Applications with strict inductance value requirements benefit from the tighter tolerance of the Bourns part. Circuits designed with ±20% tolerance margins accept either component.

Q: Are there physical mounting differences between these parts?

A: Both parts are surface mount components with similar footprints. The LD2-390-R measures 7.80mm x 7.00mm with 5.00mm maximum height. The SDR0805-390KL measures 7.80mm x 7.80mm with 5.30mm maximum height. PCB layout must accommodate these dimensional differences.

Q: Do both parts meet current environmental compliance standards?

A: The LD2-390-R is RoHS Compliant. The SDR0805-390KL is ROHS3 Compliant. Both parts carry Moisture Sensitivity Level 1 (Unlimited). Supply chain requirements should specify which compliance standard is required.

Q: What is the saturation current significance for these inductors?

A: Saturation current (Isat) indicates the current level at which inductance begins to degrade. The LD2-390-R saturates at 1.85 A while the SDR0805-390KL saturates at 1.7 A. Operating near or above saturation current reduces effective inductance and increases core losses.