CDR125-391MC Equivalent & Substitute Parts

Part Overview

The CDR125-391MC is a 390 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 520 mA with a maximum DC resistance of 1.08Ohm. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement continuity. The part operates across a temperature range of -25°C to 70°C and is designed for applications requiring fixed inductance in compact nonstandard packaging.

Substiute Parts

CDR125-391MC

Sumida America Components Inc.In Stock: 843CDR125-391MC Datasheet

Current PartRFQ

CDR125NP-391MC

Sumida America Components Inc.In Stock: 989CDR125NP-391MC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR125-391MC is determined by strict equivalence across the following critical parameters:

• Inductance Value: 390 µH (with tolerance -15%, +20%)
• Current Rating: 520 mA minimum
• DC Resistance: 1.08Ohm maximum
• Shielding Configuration: Shielded
• Self Resonant Frequency: 3.55 MHz
• Mounting Type: Surface Mount
• Physical Dimensions: 0.496" L x 0.457" W x 0.232" H maximum
• Moisture Sensitivity: MSL 1 (Unlimited)

The CDR125NP-391MC qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

CDR125NP-391MC is the direct active equivalent for CDR125-391MC applications. Selection of this substitute is based on the following factors:

1. Product Status: CDR125NP-391MC is active and currently manufactured, ensuring long-term availability and supply chain continuity compared to the obsolete CDR125-391MC.

2. Electrical Equivalence: All critical electrical parameters—inductance, current rating, DC resistance, and self-resonant frequency—are identical between the two parts.

3. Mechanical Compatibility: Physical dimensions and mounting characteristics are identical, enabling direct PCB layout compatibility without redesign.

4. Regulatory Compliance: CDR125NP-391MC achieves ROHS3 compliance, whereas CDR125-391MC is non-compliant. For applications subject to RoHS regulations, CDR125NP-391MC is the required selection.

5. Operating Temperature Range: CDR125NP-391MC extends the operating temperature range to -40°C ~ 100°C, providing broader thermal performance compared to CDR125-391MC (-25°C ~ 70°C). This extended range does not restrict compatibility for applications within the original part's temperature specification.

6. Packaging Format: CDR125NP-391MC is supplied in Tape & Reel (TR) format, standard for automated assembly processes. Verify packaging compatibility with procurement and assembly workflows.

Frequently Asked Questions (FAQ)

Q: Can CDR125NP-391MC be used as a direct replacement for CDR125-391MC in existing designs?

A: Yes. CDR125NP-391MC is electrically and mechanically equivalent to CDR125-391MC. All critical parameters—inductance, current rating, DC resistance, frequency response, and physical dimensions—are identical. Direct substitution is supported without circuit redesign or PCB layout modification.

Q: What is the difference between CDR125-391MC and CDR125NP-391MC?

A: The primary differences are product status, packaging format, operating temperature range, and RoHS compliance. CDR125-391MC is obsolete and non-compliant with RoHS regulations. CDR125NP-391MC is an active product supplied in Tape & Reel format with extended operating temperature range (-40°C ~ 100°C versus -25°C ~ 70°C) and ROHS3 compliance.

Q: Is the extended operating temperature range of CDR125NP-391MC a concern for applications designed for CDR125-391MC?

A: No. The extended temperature range of CDR125NP-391MC (-40°C ~ 100°C) encompasses the original specification (-25°C ~ 70°C). Applications operating within the original temperature limits experience no adverse effects from the substitute part's broader thermal capability.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) packaging is a supply and handling format only. It does not alter the electrical or mechanical characteristics of the component. The inductor itself is identical regardless of packaging format.

Q: Are there any compliance considerations when switching from CDR125-391MC to CDR125NP-391MC?

A: Yes. CDR125NP-391MC is ROHS3 compliant, whereas CDR125-391MC is non-compliant. For applications subject to RoHS directives or customer requirements, CDR125NP-391MC is the appropriate selection. Verify compliance requirements with your design and procurement teams.

Q: Can CDR125NP-391MC be used in high-frequency applications?

A: The self-resonant frequency of CDR125NP-391MC is 3.55 MHz. Applications operating near or above this frequency may experience reduced inductance and increased impedance. Verify frequency performance requirements against this specification.