CDR63BNP-470LC Equivalent & Substitute Parts

Part Overview

The CDR63BNP-470LC is a 47 µH shielded inductor manufactured by Sumida America Components Inc., rated for 500 mA continuous current with a maximum DC resistance of 510mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The part is surface-mounted in a nonstandard package measuring 6.20mm × 5.60mm × 3.50mm (max height) and complies with ROHS3 standards with unlimited moisture sensitivity rating (MSL 1).

Substiute Parts

CDR63BNP-470LC

Sumida America Components Inc.In Stock: 1146CDR63BNP-470LC Datasheet

Current PartRFQ

SRR0603-470KL

Bourns Inc.In Stock: 29185SRR0603-470KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR63BNP-470LC is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 47 µH (tolerance range ±10% to ±15% acceptable)
• Current rating: 500 mA minimum continuous rating
• Shielding: Shielded construction required
• Mounting: Surface mount technology
• DC resistance: Maximum 550mOhm (within acceptable operating margin)
• Compliance: ROHS3 compliant, MSL 1 rating

Acceptable Variations:

• Operating temperature range may extend beyond -40°C to 100°C
• Package dimensions may vary within mechanical compatibility constraints
• Self-resonant frequency may differ within application-dependent tolerances

The SRR0603-470KL from Bourns Inc. meets all primary equivalence criteria and is classified as an active product, making it suitable for direct substitution in applications previously using the obsolete CDR63BNP-470LC.

Parameter Comparison

Engineering Selection Recommendations

The SRR0603-470KL is the qualified substitute for the obsolete CDR63BNP-470LC based on the following engineering criteria:

Product Status Alignment: The CDR63BNP-470LC is obsolete with limited inventory (1070 pcs). The SRR0603-470KL is active with substantial inventory availability (29100 pcs), ensuring long-term supply chain continuity.

Electrical Equivalence: Both components deliver 47 µH inductance at 500 mA continuous current with shielded construction. The SRR0603-470KL exhibits tighter inductance tolerance (±10% vs ±15%), providing improved circuit performance predictability. DC resistance variance (550mOhm vs 510mOhm maximum) represents a 7.8% increase, which is acceptable for most power conversion and filtering applications.

Compliance & Certification: Both parts are ROHS3 compliant with MSL 1 rating and EAR99 export classification. The SRR0603-470KL extends the operating temperature range to 125°C, providing additional thermal margin for demanding environments.

Mechanical Considerations: Package dimensions differ slightly (6.50mm × 6.50mm vs 6.20mm × 5.60mm). PCB layout verification is required to confirm footprint compatibility. The SRR0603-470KL height is lower (3.30mm vs 3.50mm), which may provide clearance advantages in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the SRR0603-470KL directly replace the CDR63BNP-470LC without circuit redesign?

A: Direct substitution is possible when the following conditions are met: (1) PCB footprint accommodates the 6.50mm × 6.50mm package dimensions, (2) circuit design tolerates the 40 mOhm increase in maximum DC resistance, and (3) application operates within the -40°C to 125°C temperature range. Electrical performance remains equivalent for standard filtering and power conversion applications.

Q: What is the significance of the inductance tolerance difference (±15% vs ±10%)?

A: The SRR0603-470KL provides tighter tolerance control, resulting in more consistent inductance values across production batches. This improves circuit performance predictability and reduces design margin requirements. Applications with strict inductance specifications benefit from this tighter tolerance.

Q: How does the 40 mOhm increase in DC resistance affect circuit performance?

A: The DC resistance increase from 510mOhm to 550mOhm represents a 7.8% variance. In power conversion applications, this results in proportionally increased resistive losses. For a 500 mA load, additional power dissipation is approximately 10 mW. Thermal analysis should confirm acceptability for the specific application.

Q: Are there mechanical compatibility concerns with the different package dimensions?

A: The SRR0603-470KL measures 6.50mm × 6.50mm compared to the CDR63BNP-470LC at 6.20mm × 5.60mm. PCB layout verification is mandatory to confirm the larger footprint fits within available space. The lower height (3.30mm vs 3.50mm) may provide clearance benefits in vertically constrained assemblies.

Q: What is the difference between the self-resonant frequencies (15.3 MHz vs 13 MHz)?

A: Self-resonant frequency determines the upper frequency limit for inductor operation. The 2.3 MHz difference is application-dependent. For frequencies below 10 MHz, both components perform equivalently. Applications operating near or above 13 MHz require frequency response verification with the SRR0603-470KL.

Q: Is the extended temperature range (-40°C to 125°C) beneficial for all applications?

A: The extended upper temperature limit of 125°C provides additional thermal margin for high-ambient or high-power-density applications. Standard applications operating within -40°C to 100°C experience no performance difference. Extended range capability offers design flexibility for future thermal stress scenarios.