LD1-8R2-R Equivalent & Substitute Parts

Part Overview

The LD1-8R2-R is an 8.2 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.32 A continuous current with a maximum DC resistance of 132 mOhm and operates across the temperature range of -40°C to 125°C. The part is RoHS Compliant and carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. The LD1-8R2-R maintains Active product status with 1132 pieces currently in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. Alternative sources ensure supply chain continuity and design flexibility while preserving circuit functionality.

Substiute Parts

LD1-8R2-R

Eaton - Electronics DivisionIn Stock: 1233LD1-8R2-R Datasheet

Current PartRFQ

SDR0403-8R2ML

Bourns Inc.In Stock: 5158SDR0403-8R2ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LD1-8R2-R is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 8.2 µH with ±20% tolerance
• Core type: Ferrite drum core, wirewound construction
• Shielding configuration: Unshielded
• Current rating: Minimum 1.26 A (within operational margin of 1.32 A specification)
• DC resistance: Maximum 130–132 mOhm
• Operating temperature range: -40°C to 125°C minimum
• Mounting: Surface mount, nonstandard package
• Physical footprint: 4.50 x 4.00 mm base dimensions

Compliance Requirements:

• RoHS compliance (RoHS Compliant or ROHS3 Compliant acceptable)
• MSL rating: 1 (Unlimited) or equivalent
• Active product status

The SDR0403-8R2ML from Bourns Inc. satisfies all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: LD1-8R2-R The LD1-8R2-R is the specified component with Active product status and RoHS Compliant certification. Current inventory of 1132 pieces supports immediate procurement. This part is suitable for applications requiring the exact electrical and thermal specifications defined.

Substitute Part: SDR0403-8R2ML The SDR0403-8R2ML from Bourns Inc. is qualified as a direct substitute based on electrical equivalence and mechanical compatibility. This part carries ROHS3 Compliant status, which exceeds RoHS Compliant requirements. The current rating of 1.26 A is within acceptable operational margins for the 1.32 A specification. The DC resistance of 130 mOhm is lower than the 132 mOhm maximum, resulting in reduced power dissipation. The maximum height of 3.50 mm is 0.30 mm greater than the primary part; verification of PCB clearance is required for space-constrained layouts. Inventory availability of 5100 pieces provides supply security. Both parts maintain identical inductance, tolerance, core material, shielding, temperature range, and mounting configuration.

Selection Criteria:

• Use LD1-8R2-R when Eaton supply chain preference or specific design qualification exists
• Use SDR0403-8R2ML when Bourns sourcing is preferred, when lower DC resistance is beneficial, or when supply continuity requires alternative sourcing
• Verify PCB height clearance when substituting due to 0.30 mm height difference

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-8R2ML replace the LD1-8R2-R in existing designs?

A: Yes. Both parts share identical inductance (8.2 µH), tolerance (±20%), core material (ferrite), shielding (unshielded), operating temperature range (-40 to 125°C), and base package footprint (4.50 x 4.00 mm). The SDR0403-8R2ML current rating of 1.26 A is within acceptable operational margins of the 1.32 A specification. PCB layout verification is required to confirm the 0.30 mm height difference (3.50 mm vs. 3.20 mm) does not conflict with component clearances.

Q: What are the electrical differences between these parts?

A: The SDR0403-8R2ML has a lower maximum DC resistance (130 mOhm vs. 132 mOhm), resulting in reduced resistive losses. The current rating is 1.26 A compared to 1.32 A; this 0.06 A difference represents a 4.5% reduction and remains within acceptable design margins for most applications. Both parts are tested at different frequencies (LD1-8R2-R at 100 kHz, SDR0403-8R2ML at 1 kHz), but inductance values are equivalent at the specified 8.2 µH.

Q: Are there compliance or certification differences?

A: The LD1-8R2-R carries RoHS Compliant certification. The SDR0403-8R2ML carries ROHS3 Compliant certification, which represents an enhanced compliance standard. Both parts are MSL 1 (Unlimited) and suitable for unrestricted moisture environments. Both are Active products with full manufacturer support.

Q: What physical considerations apply when substituting?

A: The package footprint is identical (4.50 x 4.00 mm L x W). The seated height differs by 0.30 mm (LD1-8R2-R: 3.20 mm max; SDR0403-8R2ML: 3.50 mm max). Verify PCB layout clearance above the component to ensure no interference with overlying components, shields, or enclosure elements. Both parts use identical surface mount mounting type and nonstandard package configuration.

Q: Which part should be selected for new designs?

A: Selection depends on supply chain strategy and design requirements. The SDR0403-8R2ML offers lower DC resistance (beneficial for power efficiency), higher current saturation rating (1.9 A vs. 1.41 A), and enhanced ROHS3 compliance. The LD1-8R2-R may be preferred if Eaton qualification or existing supply agreements exist. Both parts are Active and fully supported by their respective manufacturers.