CD54NP-330LC Fixed Inductor Equivalent & Substitute Parts

Part Overview

The CD54NP-330LC is a 33 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This component is rated for 880 mA continuous current with a maximum DC resistance of 230 mOhm and operates across the temperature range of -40°C to 100°C. The part is Active in product status and RoHS3 compliant, making it suitable for modern electronic applications requiring fixed inductance in compact form factors.

Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate component availability variations across manufacturing cycles.

Substiute Parts

CD54NP-330LC

Sumida America Components Inc.In Stock: 649CD54NP-330LC Datasheet

Current PartRFQ

CR54NP-330LC

Sumida America Components Inc.In Stock: 2410CR54NP-330LC Datasheet

SimilarRFQ

SDR0604-330KL

Bourns Inc.In Stock: 16847SDR0604-330KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD54NP-330LC are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 33 µH (tolerance variations acceptable within design margin)
• Current rating: 880 mA minimum
• DC resistance: Within acceptable operating limits for the application
• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Operating temperature range: Minimum -40°C to 100°C coverage
• RoHS3 compliance: Required for regulatory alignment

Substitution Logic: The CR54NP-330LC and SDR0604-330KL both meet the primary electrical specifications of 33 µH inductance and 880 mA current rating. Both are ferrite core, unshielded, surface mount inductors with RoHS3 compliance. Variations in DC resistance (230 mOhm vs. 250 mOhm maximum) and inductance tolerance (±15% vs. ±10%) represent acceptable engineering trade-offs within typical circuit design margins. The SDR0604-330KL offers extended operating temperature range to 125°C and additional performance data (Q factor, saturation current), providing enhanced specification coverage for demanding applications.

Parameter Comparison

Engineering Selection Recommendations

CD54NP-330LC (Primary Part): Select this part when the original design specification calls for the CD54 series and supply availability is confirmed. This part maintains the exact electrical and thermal specifications of the original design intent.

CR54NP-330LC (Sumida Alternative): This substitute is qualified for direct replacement with the CD54NP-330LC. Both parts are manufactured by Sumida America Components Inc. and share identical electrical ratings (33 µH, 880 mA, 230 mOhm DCR maximum). The CR54NP-330LC provides additional performance data (16.3 MHz self-resonant frequency) and represents an alternative within the same manufacturer's product portfolio. Use this part when CD54NP-330LC availability is limited but CR54 series stock is available.

SDR0604-330KL (Bourns Alternative): This part qualifies as a substitute based on matching inductance (33 µH), current rating (880 mA), and core specifications. The SDR0604-330KL is manufactured by Bourns Inc. and offers tighter inductance tolerance (±10% vs. ±15%), extended operating temperature range to 125°C, and documented Q factor (24 @ 2.52 MHz) and saturation current (1.1 A). The DC resistance maximum is 250 mOhm, representing a 20 mOhm increase over the primary part. This substitution is appropriate for applications requiring enhanced thermal performance or tighter inductance control. Verify that the 250 mOhm DCR specification does not exceed circuit design margins before implementation.

All three parts are Active in product status, RoHS3 compliant, and available in Tape & Reel packaging with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can the CR54NP-330LC directly replace the CD54NP-330LC in production?

A: Yes. Both parts share identical electrical specifications: 33 µH inductance at ±15% tolerance, 880 mA current rating, and 230 mOhm maximum DC resistance. Both are ferrite core, unshielded, surface mount inductors manufactured by Sumida America Components Inc. with RoHS3 compliance and identical operating temperature range (-40°C to 100°C). Physical dimensions are nearly identical (5.80 x 5.20 mm vs. 5.80 x 5.30 mm), with height within 0.05 mm variance. Direct substitution is supported.

Q: What is the impact of using SDR0604-330KL instead of CD54NP-330LC?

A: The SDR0604-330KL maintains the 33 µH inductance and 880 mA current rating. Key differences are: (1) DC resistance increases from 230 mOhm maximum to 250 mOhm maximum, which may increase power dissipation by approximately 8.7% at rated current; (2) inductance tolerance improves from ±15% to ±10%; (3) operating temperature range extends to 125°C (vs. 100°C); (4) physical footprint increases slightly to 5.80 x 5.80 mm. Verify that the higher DCR and larger footprint are acceptable within your circuit layout and thermal budget before substitution.

Q: Are all three parts compatible with the same PCB footprint?

A: The CD54NP-330LC and CR54NP-330LC have nearly identical footprints (5.80 x 5.20 mm and 5.80 x 5.30 mm respectively) and are directly compatible. The SDR0604-330KL has a slightly larger footprint (5.80 x 5.80 mm). If PCB layout is constrained, verify that the SDR0604-330KL footprint accommodates the design before substitution. Height specifications are comparable across all three parts (4.80-4.85 mm maximum).

Q: Which substitute part offers the best performance specifications?

A: The SDR0604-330KL provides the most comprehensive performance data, including Q factor (24 @ 2.52 MHz), saturation current (1.1 A), and self-resonant frequency (13 MHz). It also offers tighter inductance tolerance (±10%) and extended operating temperature range to 125°C. However, these enhancements come with increased DC resistance (250 mOhm vs. 230 mOhm) and larger physical size. Select based on application requirements rather than specification breadth alone.

Q: Are moisture sensitivity and RoHS compliance identical across all three parts?

A: Yes. All three parts carry MSL 1 (Unlimited) moisture sensitivity rating and are ROHS3 compliant. No differences exist in these regulatory and handling specifications.

Q: What is the inductance frequency test condition for each part?

A: The CD54NP-330LC and CR54NP-330LC are tested at 2.52 MHz. The SDR0604-330KL is tested at 1 kHz. This difference reflects different measurement methodologies but does not affect functional equivalence at the specified 33 µH nominal value.