Equivalent & Substitute Parts for SDR1005-331K

Part Overview

The SDR1005-331K is a 330 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 550 mA continuous current with a maximum DC resistance of 1.15Ohm. This component is classified as obsolete, making identification of suitable equivalent parts essential for ongoing design support and production continuity. The part operates across an industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SDR1005-331K

Bourns Inc.In Stock: 760SDR1005-331K Datasheet

Current PartRFQ

SDR1005-331KL

Bourns Inc.In Stock: 1498SDR1005-331KL Datasheet

DirectRFQ

P0752.334NL

Pulse ElectronicsIn Stock: 937P0752.334NL Datasheet

SimilarRFQ

P0752.334NLT

Pulse ElectronicsIn Stock: 6340P0752.334NLT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDR1005-331K are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 330 µH (exact match required)
• Inductance tolerance: ±10% or tighter
• Current rating: minimum 550 mA
• DC resistance: 1.15 Ohm or lower
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Physical dimensions: compatible with 12.70mm x 10.00mm footprint
• Operating temperature range: minimum -40°C ~ 125°C coverage

Direct Equivalent Category: Parts meeting all primary criteria with identical or superior electrical performance and packaging compatibility.

Similar Equivalent Category: Parts meeting core inductance and current requirements with minor variations in DC resistance, tolerance, or temperature range that remain functionally acceptable within the application's design margins.

Parameter Comparison

Engineering Selection Recommendations

SDR1005-331KL (Direct Equivalent - Recommended Primary Choice)

The SDR1005-331KL is the direct equivalent replacement for the obsolete SDR1005-331K. Both parts are manufactured by Bourns Inc. and share identical electrical specifications: 330 µH inductance with ±10% tolerance, 550 mA current rating, and 1.15 Ohm maximum DC resistance. The SDR1005-331KL maintains the same operating temperature range (-40°C ~ 125°C), physical dimensions (12.70mm x 10.00mm), and height (5.00mm). The primary distinction is product status: SDR1005-331KL is active production, ensuring long-term availability. Both parts meet ROHS3 compliance and carry MSL 1 rating. The SDR1005-331KL is available in Tape & Reel packaging, supporting automated assembly processes.

P0752.334NL and P0752.334NLT (Similar Equivalents - Secondary Options)

The Pulse Electronics P0752.334NL and P0752.334NLT represent similar equivalents with acceptable performance variations. Both parts maintain the 330 µH inductance specification and exceed the current rating requirement at 600 mA. The DC resistance is improved at 1.02 Ohm maximum, reducing power dissipation compared to the original specification. Operating temperature range extends to 130°C, providing additional thermal margin. Inductance tolerance is ±20%, which is wider than the original ±10% specification. Physical dimensions show minor variations: 12.95mm length and 9.40mm width with 5.46mm maximum height. These dimensional differences require PCB layout verification to confirm mechanical compatibility. Both Pulse Electronics parts are active production status and ROHS3 compliant. The P0752.334NLT variant provides Tape & Reel packaging for production environments.

Frequently Asked Questions (FAQ)

Q: Can SDR1005-331KL be used as a direct replacement for SDR1005-331K?

A: Yes. The SDR1005-331KL is a direct equivalent with identical electrical specifications and physical dimensions. The only difference is packaging format and product status. SDR1005-331KL is in active production, making it the recommended replacement for the obsolete SDR1005-331K.

Q: What are the key differences between Bourns and Pulse Electronics substitutes?

A: The Bourns SDR1005-331KL maintains identical specifications to the original part. The Pulse Electronics P0752.334NL and P0752.334NLT offer improved DC resistance (1.02 Ohm vs. 1.15 Ohm), higher current rating (600 mA vs. 550 mA), and extended temperature range (130°C vs. 125°C). Inductance tolerance is wider at ±20% versus ±10%. Physical dimensions differ slightly, requiring PCB layout verification.

Q: Are there packaging considerations when selecting a substitute?

A: Yes. The original SDR1005-331K is supplied in bulk packaging. The SDR1005-331KL and P0752.334NLT are available in Tape & Reel format, which is standard for automated assembly. The P0752.334NL is supplied in bulk. Select packaging based on production volume and assembly process requirements.

Q: Do all substitute parts meet compliance requirements?

A: Yes. All listed substitutes—SDR1005-331KL, P0752.334NL, and P0752.334NLT—are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile.

Q: What is the impact of the ±20% inductance tolerance in Pulse Electronics parts?

A: The Pulse Electronics substitutes carry ±20% inductance tolerance compared to ±10% for the Bourns parts. This wider tolerance may affect circuit performance in applications with tight inductance requirements. Verify that the application design can accommodate this tolerance variation before selection.

Q: Are the physical dimension differences between Bourns and Pulse Electronics parts significant?

A: Minor differences exist. Pulse Electronics parts are 0.510" L x 0.370" W (12.95mm x 9.40mm) with 0.215" (5.46mm) height, compared to Bourns 0.500" L x 0.394" W (12.70mm x 10.00mm) with 0.197" (5.00mm) height. Verify PCB footprint and clearance compatibility before design implementation.