LD1-820-R Equivalent & Substitute Parts

Part Overview

The LD1-820-R is a 82 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 430 mA continuous current with a maximum DC resistance of 1.28 Ohm and operates across the temperature range of -40°C to 125°C. The part is RoHS Compliant and carries an Active product status.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

LD1-820-R

Eaton - Electronics DivisionIn Stock: 930LD1-820-R Datasheet

Current PartRFQ

SDR0403-820KL

Bourns Inc.In Stock: 3363SDR0403-820KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LD1-820-R is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value: 82 µH at specified test frequency
• Inductance tolerance: ±10%
• Current rating: minimum 420 mA (within 2.3% of primary part)
• DC resistance: maximum 1.27 Ohm (within 0.8% of primary part)
• Saturation current: minimum 500 mA

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Package dimensions: 4.50 x 4.00 x 3.50 mm (identical)
• Core type: Drum Core, Wirewound
• Core material: Ferrite
• Shielding: Unshielded

Environmental & Compliance Criteria:

• Operating temperature range: -40°C to 125°C
• RoHS compliance status: Active compliance required
• Packaging: Tape & Reel (TR)

The SDR0403-820KL meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: LD1-820-R

• Active product status with 848 units in stock
• RoHS Compliant certification
• Suitable for applications requiring 430 mA continuous current capacity

Substitute Part: SDR0403-820KL

• Active product status with 3272 units in stock
• ROHS3 Compliant certification (enhanced compliance standard)
• Electrical parameters within acceptable variance: current rating 420 mA (2.3% lower), DC resistance 1.27 Ohm (0.8% lower)
• Saturation current 580 mA provides 16% additional margin
• Identical mechanical footprint and mounting compatibility
• Identical operating temperature range

Selection between these parts is determined by availability, supply chain requirements, and compliance specifications. Both parts satisfy the core electrical and mechanical requirements for 82 µH inductor applications in the specified current and temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can SDR0403-820KL replace LD1-820-R in existing designs?

A: Yes. Both parts share identical inductance (82 µH ±10%), operating temperature range (-40 to 125°C), package dimensions (4.50 x 4.00 x 3.50 mm), and mounting type (Surface Mount). The current rating variance of 2.3% and DC resistance variance of 0.8% fall within acceptable engineering tolerances for inductor substitution.

Q: What is the impact of the 420 mA vs 430 mA current rating difference?

A: The SDR0403-820KL has a 10 mA lower continuous current rating (2.3% reduction). Applications operating at or below 420 mA can use this substitute without derating. Applications requiring the full 430 mA rating should verify the SDR0403-820KL saturation current of 580 mA provides sufficient margin for the specific circuit topology.

Q: Are the RoHS compliance levels equivalent?

A: Both parts meet RoHS requirements. The LD1-820-R carries RoHS Compliant status, while the SDR0403-820KL carries ROHS3 Compliant status, which represents an enhanced compliance standard. Either certification is acceptable for RoHS-regulated applications.

Q: Do these parts have identical physical footprints?

A: Yes. Both parts have identical package dimensions of 4.50 mm length × 4.00 mm width × 3.50 mm height (seated). Both are surface mount components in nonstandard packages. PCB layout and reflow profiles require no modification for substitution.

Q: What is the difference in inductance test frequency?

A: The LD1-820-R is tested at 100 kHz, while the SDR0403-820KL is tested at 1 kHz. Both parts are specified at 82 µH ±10%. For applications sensitive to frequency-dependent inductance characteristics, verify the specific test frequency requirements of the circuit design.

Q: Can I use either part interchangeably in production?

A: Yes, provided the application current requirement does not exceed 420 mA continuous. Both parts are Active products with established supply chains. Substitution requires no circuit modifications due to identical electrical specifications within tolerance and identical mechanical compatibility.