CDR105NP-331MC Equivalent & Substitute Parts

Part Overview

The CDR105NP-331MC is a 330 µH shielded surface mount inductor manufactured by Sumida America Components Inc. with a current rating of 440 mA and maximum DC resistance of 1.03Ohm. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part operates across a temperature range of -40°C to 100°C and is RoHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

CDR105NP-331MC

Sumida America Components Inc.In Stock: 887CDR105NP-331MC Datasheet

Current PartRFQ

CDRH8D43RT125NP-331MC

Sumida America Components Inc.In Stock: 2172CDRH8D43RT125NP-331MC Datasheet

SimilarRFQ

SRR0905-331K

Bourns Inc.In Stock: 939SRR0905-331K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR105NP-331MC is determined by the following critical parameters: inductance value (330 µH), shielding type (shielded), mounting configuration (surface mount), and operating temperature compatibility. Substitute parts must maintain the same inductance specification within acceptable tolerance ranges and support the application's current requirements.

The two identified substitute parts meet these criteria through matching inductance values and shielded surface mount construction. Substitution decisions must account for differences in current rating, DC resistance, temperature range, and packaging format, as these parameters directly affect circuit performance and thermal management.

Parameter Comparison

Engineering Selection Recommendations

CDRH8D43RT125NP-331MC (Sumida America Components Inc.): This substitute maintains manufacturer continuity with the original CDR105NP-331MC while offering active product status. The part provides higher current rating (480 mA versus 440 mA), extended operating temperature range (-40°C to 125°C), and improved availability through standard Tape & Reel packaging. The increased DC resistance (1.33 Ohm maximum) and tighter inductance tolerance (±20%) must be evaluated against specific circuit requirements. Smaller physical dimensions (8.10mm x 8.00mm x 4.50mm) may provide layout advantages in space-constrained applications.

SRR0905-331K (Bourns Inc.): This alternative represents a cross-manufacturer substitute with active product status and ROHS3 compliance. The part features superior inductance tolerance (±10%), lower current rating (370 mA), and slightly higher DC resistance (1.2 Ohm maximum). The drum core, wirewound construction and documented Q factor (29 @ 796kHz) provide additional performance characterization. Applications requiring the full 440 mA current rating of the original part cannot use this substitute. The cylindrical form factor (9.90mm diameter) differs from rectangular alternatives and may affect PCB layout compatibility.

Both substitutes are RoHS compliant and maintain unlimited moisture sensitivity rating (MSL 1). Selection should prioritize current rating requirements and thermal operating envelope compatibility with the target application.

Frequently Asked Questions (FAQ)

Q: Can CDRH8D43RT125NP-331MC directly replace CDR105NP-331MC in all applications?

A: Direct replacement is possible for applications where the current requirement does not exceed 480 mA and the operating temperature does not exceed 125°C. The increased DC resistance (1.33 Ohm versus 1.03 Ohm) will generate additional heat dissipation. Verify that the smaller physical dimensions (8.10mm x 8.00mm versus 10.00mm x 9.20mm) accommodate PCB layout constraints and that the tighter inductance tolerance (±20% versus -15%, +20%) meets circuit specifications.

Q: Is SRR0905-331K suitable for applications requiring 440 mA current?

A: No. The SRR0905-331K has a maximum current rating of 370 mA, which is insufficient for applications requiring the full 440 mA capability of the CDR105NP-331MC. This substitute is applicable only to circuits with current requirements at or below 370 mA.

Q: What are the packaging differences between these parts?

A: The CDR105NP-331MC uses nonstandard packaging. Both CDRH8D43RT125NP-331MC and SRR0905-331K are supplied in standard Tape & Reel (TR) format, which provides improved handling, automated assembly compatibility, and supply chain efficiency compared to nonstandard packaging.

Q: How do the physical dimensions affect PCB design?

A: The CDR105NP-331MC measures 10.00mm x 9.20mm x 5.50mm (height). The CDRH8D43RT125NP-331MC is smaller at 8.10mm x 8.00mm x 4.50mm, allowing denser PCB layouts. The SRR0905-331K uses a cylindrical form factor with 9.90mm diameter and 4.80mm height, which may require different footprint design. Verify footprint compatibility with your PCB design tools before component selection.

Q: Are all three parts RoHS compliant?

A: Yes. The CDR105NP-331MC and SRR0905-331K are ROHS3 compliant. The CDRH8D43RT125NP-331MC is RoHS compliant. All three parts meet environmental compliance requirements for restricted substance elimination.

Q: What is the significance of inductance tolerance differences?

A: The CDR105NP-331MC specifies -15%, +20% tolerance. The CDRH8D43RT125NP-331MC and SRR0905-331K offer ±20% and ±10% tolerances respectively. Tighter tolerance (±10%) provides more predictable circuit performance but may affect component cost and availability. Circuit designs with tight inductance requirements should prioritize the SRR0905-331K or verify that ±20% tolerance is acceptable.