CDR63BNP-680LC Equivalent & Substitute Parts

Part Overview

The CDR63BNP-680LC is a 68 µH shielded inductor manufactured by Sumida America Components Inc., designed for surface mount applications with a current rating of 420 mA and maximum DC resistance of 820mOhm. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs. The part operates across the temperature range of -40°C to 100°C and meets ROHS3 compliance standards.

Substiute Parts

CDR63BNP-680LC

Sumida America Components Inc.In Stock: 690CDR63BNP-680LC Datasheet

Current PartRFQ

SRR0603-680KL

Bourns Inc.In Stock: 1264SRR0603-680KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR63BNP-680LC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 68 µH (tolerance range ±15% to ±10% acceptable)
• Current rating: minimum 400 mA (substitute rated at 400 mA meets requirement with 20 mA margin reduction)
• DC resistance: maximum 900mOhm (substitute specification of 900mOhm is within acceptable operating parameters)
• Shielding: Shielded construction required
• Mounting: Surface mount configuration
• Compliance: ROHS3 certification mandatory

The substitute part SRR0603-680KL from Bourns Inc. satisfies all primary matching criteria. While the substitute exhibits a tighter inductance tolerance (±10% versus ±15%), lower operating temperature maximum (125°C versus 100°C), and slightly increased DC resistance (900mOhm versus 820mOhm), these variations remain within acceptable engineering parameters for equivalent functionality.

Parameter Comparison

Engineering Selection Recommendations

The SRR0603-680KL from Bourns Inc. serves as a direct functional equivalent for the obsolete CDR63BNP-680LC. Selection of this substitute is supported by the following engineering factors:

Compliance & Availability: Both components maintain ROHS3 compliance and MSL Level 1 rating. The substitute is classified as active product status, ensuring continued availability and supply chain reliability compared to the obsolete main part.

Electrical Performance: The substitute maintains the critical 68 µH inductance specification with improved tolerance (±10%). The current rating reduction from 420 mA to 400 mA represents a 4.8% decrease; applications operating below 400 mA experience no functional impact. The DC resistance increase from 820mOhm to 900mOhm (9.8% increase) remains within acceptable thermal and efficiency parameters for typical inductor applications.

Physical Integration: The substitute exhibits a slightly larger footprint (6.50mm x 6.50mm versus 6.20mm x 5.60mm) with a lower profile height (3.30mm versus 3.50mm). PCB layout verification is required to confirm dimensional compatibility. The corner terminal configuration of the substitute differs from the main part; board design must accommodate this terminal placement variation.

Temperature Performance: The substitute's extended operating range (-40°C to 125°C) provides superior thermal margin compared to the main part (-40°C to 100°C), supporting applications with elevated ambient or self-heating requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR0603-680KL directly replace the CDR63BNP-680LC without circuit modification?

A: The SRR0603-680KL provides electrical equivalence for the 68 µH inductance specification. However, PCB layout modification is necessary due to dimensional differences (footprint size and corner terminal configuration). Verify that the 400 mA current rating satisfies your application's maximum current requirement.

Q: What is the impact of the 80 mOhm increase in DC resistance?

A: The DC resistance increase from 820mOhm to 900mOhm represents a 9.8% rise. In applications with continuous current flow, this results in proportionally increased resistive losses and heat generation. Calculate power dissipation (P = I²R) for your specific current profile to confirm thermal acceptability.

Q: Are there dimensional constraints I should consider?

A: The substitute is 0.30mm longer and 0.90mm wider than the main part, with a 0.20mm lower profile. Verify PCB layout clearances and component spacing. The corner terminal configuration requires confirmation that solder pad placement accommodates this terminal geometry.

Q: Does the tighter inductance tolerance (±10%) of the substitute provide any advantage?

A: Yes. The substitute's ±10% tolerance is tighter than the main part's ±15%, reducing inductance variation across the production batch. This may improve circuit performance consistency in applications sensitive to inductance drift.

Q: Is the extended temperature range of the substitute (-40°C to 125°C) beneficial?

A: The substitute's 25°C higher maximum operating temperature provides additional thermal margin. Applications operating near 100°C benefit from this extended range, reducing thermal stress on the component.

Q: What compliance certifications apply to both parts?

A: Both the CDR63BNP-680LC and SRR0603-680KL maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.