LD2-331-R Equivalent & Substitute Parts

Part Overview

The LD2-331-R is a 330 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 830 mA continuous current with a maximum DC resistance of 1.26 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 inductance value and package class.

Substiute Parts

LD2-331-R

Eaton - Electronics DivisionIn Stock: 3149LD2-331-R Datasheet

Current PartRFQ

SDR0805-331KL

Bourns Inc.In Stock: 52250SDR0805-331KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LD2-331-R is determined by the following critical parameters:

Primary Electrical Criteria:

• Inductance value: 330 µH (core specification)
• DC Resistance: 1.26 Ohm maximum (electrical performance)
• Core material: Ferrite, unshielded (electromagnetic characteristics)
• Operating temperature range: -40°C to 125°C (thermal compatibility)

Secondary Mechanical Criteria:

• Mounting type: Surface mount (assembly compatibility)
• Package class: Nonstandard drum core (physical form factor)

Compliance Criteria:

• RoHS compliance status (regulatory requirement)

The SDR0805-331KL from Bourns Inc. qualifies as a substitute part because it maintains the same inductance value (330 µH), identical DC resistance specification (1.26 Ohm max), ferrite core construction, unshielded configuration, surface mount capability, and compatible operating temperature range. Both parts are RoHS compliant and share the same HTSUS classification.

Parameter Comparison

Engineering Selection Recommendations

LD2-331-R Selection Criteria: The LD2-331-R is the primary choice when the application requires the full 830 mA current rating and 640 mA saturation current specification. This part maintains Active product status and RoHS Compliance. Select this part for designs where current capacity is a critical constraint.

SDR0805-331KL Selection Criteria: The SDR0805-331KL from Bourns Inc. is suitable as a substitute when the application current requirement does not exceed 400 mA continuous or 580 mA saturation current. This part offers a tighter inductance tolerance (±10% versus ±20%) and maintains ROHS3 Compliance with Active product status. The SDR0805 series provides higher inventory availability (52,201 pieces in stock versus 3,100 pieces for LD2-331-R).

Compliance Basis: Both parts satisfy RoHS requirements and operate within the -40°C to 125°C temperature range. Both are classified under HTSUS 8504.50.4000 and carry EAR99 ECCN designation.

Frequently Asked Questions (FAQ)

Q: Can SDR0805-331KL replace LD2-331-R in all applications?

A: The SDR0805-331KL can replace the LD2-331-R only in applications where the continuous current requirement does not exceed 400 mA. The LD2-331-R is rated for 830 mA continuous current, while the SDR0805-331KL is rated for 400 mA. If your circuit operates above 400 mA, the LD2-331-R must be used.

Q: What is the difference in inductance tolerance between these parts?

A: The LD2-331-R has an inductance tolerance of ±20%, while the SDR0805-331KL has a tighter tolerance of ±10%. For applications requiring precise inductance values, the SDR0805-331KL provides better tolerance performance.

Q: Are the physical dimensions compatible?

A: Both parts are surface mount components with similar footprints. The LD2-331-R measures 7.80mm L x 7.00mm W x 5.00mm H (max), while the SDR0805-331KL measures 7.80mm L x 7.80mm W x 5.30mm H (max). The width and height differences are minor and typically compatible with standard PCB layouts designed for nonstandard drum core inductors.

Q: Do both parts have the same DC resistance?

A: Yes, both the LD2-331-R and SDR0805-331KL have a maximum DC resistance of 1.26 Ohm, ensuring equivalent electrical performance in this parameter.

Q: What is the saturation current difference?

A: The LD2-331-R has a saturation current (Isat) of 640 mA, while the SDR0805-331KL has an Isat of 580 mA. This 60 mA difference should be considered in applications operating near saturation limits.

Q: Are both parts RoHS compliant?

A: Yes, both parts are RoHS compliant. The LD2-331-R carries RoHS Compliant status, and the SDR0805-331KL carries ROHS3 Compliant status, both meeting current regulatory requirements.

Q: Which part should I choose for new designs?

A: For new designs, evaluate your circuit's maximum continuous current requirement. If it exceeds 400 mA, use the LD2-331-R. If it remains below 400 mA, either part is acceptable; the SDR0805-331KL offers tighter tolerance and better availability.