CDR63BNP-330LC Equivalent & Substitute Parts

Part Overview

The CDR63BNP-330LC is a 33 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 610 mA continuous current with a maximum DC resistance of 410mOhm. This component is classified as obsolete product status. Locating equivalent substitute parts is necessary due to discontinued manufacturing and limited remaining inventory, requiring engineers to identify functionally compatible alternatives that meet the original design specifications.

Substiute Parts

CDR63BNP-330LC

Sumida America Components Inc.In Stock: 952CDR63BNP-330LC Datasheet

Current PartRFQ

SRR0603-330KL

Bourns Inc.In Stock: 2060SRR0603-330KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR63BNP-330LC is determined by strict equivalence across the following critical parameters:

Inductance Value: Both the main part and substitute must maintain 33 µH inductance to ensure circuit performance and frequency response characteristics remain unchanged.

Current Rating Compatibility: The substitute part must support a minimum continuous current rating of 610 mA. The SRR0603-330KL provides 600 mA continuous rating, which falls within acceptable tolerance for this application category, with additional saturation current (Isat) of 830mA providing operational margin.

DC Resistance (DCR): The substitute maximum DCR of 430mOhm is within acceptable range relative to the original 410mOhm specification, with variance of 20mOhm representing acceptable tolerance for wirewound inductor construction.

Shielding Requirement: Both parts feature shielded construction, meeting electromagnetic interference containment requirements.

Surface Mount Configuration: Both components utilize surface mount technology with nonstandard package dimensions, enabling direct PCB integration without redesign.

Environmental Compliance: Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Parameter Comparison

Engineering Selection Recommendations

The SRR0603-330KL from Bourns Inc. qualifies as a direct substitute for the obsolete CDR63BNP-330LC based on the following engineering criteria:

Electrical Equivalence: Both inductors maintain identical 33 µH inductance values with compatible tolerance specifications. The SRR0603-330KL provides superior inductance tolerance (±10% versus ±15%), reducing circuit performance variation. Current rating differential of 10 mA (610 mA versus 600 mA) is within acceptable engineering margin for this component category.

Compliance Status: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with current manufacturing standards and supply chain protocols. The substitute part carries active product status with established supply availability (2008 pcs in stock versus 921 pcs for the obsolete main part).

Thermal Performance: The SRR0603-330KL extends operating temperature range to -40°C ~ 125°C, providing enhanced thermal margin compared to the original -40°C ~ 100°C specification.

Physical Integration: Dimensional differences are minimal. The substitute measures 0.256" x 0.256" versus 0.244" x 0.220" for the main part, with seated height of 0.130" versus 0.138". These variations remain within typical PCB layout tolerances for nonstandard surface mount packages.

DC Resistance Consideration: The 20mOhm increase in maximum DCR (430mOhm versus 410mOhm) represents 4.9% variance, acceptable for inductor applications where DCR tolerance bands typically span ±20% or greater.

Frequently Asked Questions (FAQ)

Q: Can the SRR0603-330KL directly replace the CDR63BNP-330LC without PCB modification?

A: Physical dimensions differ slightly. The substitute is 0.256" x 0.256" versus 0.244" x 0.220" for the original. PCB footprint verification is required. The SRR0603-330KL features corner terminals, which may require footprint adjustment. Height difference (0.130" versus 0.138") is negligible for clearance considerations.

Q: What is the impact of the 10 mA current rating reduction (610 mA to 600 mA)?

A: The 1.6% reduction in continuous current rating is within acceptable tolerance for most applications. The SRR0603-330KL provides 830mA saturation current, offering operational margin above the continuous rating. Circuit current requirements must not exceed 600 mA continuous to maintain substitute part reliability.

Q: How does the inductance tolerance difference affect circuit performance?

A: The SRR0603-330KL provides tighter tolerance (±10% versus ±15%), resulting in improved circuit performance consistency and reduced frequency response variation across production batches.

Q: Is the 20mOhm increase in DC resistance significant?

A: The increase from 410mOhm to 430mOhm represents 4.9% variance. For inductor applications, this is within normal manufacturing tolerance. Power dissipation impact is proportional to I²R; at 600 mA, the additional loss is approximately 7.2 mW, typically negligible in most circuit designs.

Q: What are the implications of the different self-resonant frequencies?

A: The main part specifies 18.2MHz self-resonant frequency versus 16MHz for the substitute. This 2.2MHz difference may affect high-frequency circuit behavior. Applications operating near or above 16MHz require detailed frequency response analysis to confirm compatibility.

Q: Are there supply chain advantages to using the SRR0603-330KL?

A: Yes. The SRR0603-330KL carries active product status with 2008 pcs available inventory, compared to 921 pcs for the obsolete CDR63BNP-330LC. Long-term availability and pricing stability favor the Bourns substitute.