CDR125NP-121MC Equivalent & Substitute Parts

Part Overview

The CDR125NP-121MC is a 120 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 950 mA continuous current with a maximum DC resistance of 280mOhm. This component is classified as obsolete, making identification of suitable equivalent parts essential for ongoing production support and design continuity. The part operates across the temperature range of -40°C to 100°C and meets ROHS3 compliance requirements. Due to its obsolete status, alternative components with compatible electrical and mechanical specifications are necessary for procurement and circuit redesign applications.

Substiute Parts

CDR125NP-121MC

Sumida America Components Inc.In Stock: 829CDR125NP-121MC Datasheet

Current PartRFQ

CDRH124NP-121MC

Sumida America Components Inc.In Stock: 1070CDRH124NP-121MC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR125NP-121MC is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 120 µH (exact match required)
• Shielding type: Shielded (electromagnetic containment requirement)
• Mounting technology: Surface Mount (PCB assembly compatibility)
• Operating temperature range: -40°C to 100°C minimum (thermal envelope)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

Secondary Compatibility Parameters:

• Current rating: Equal to or greater than 950 mA
• DC resistance: Equal to or less than 280mOhm (thermal and efficiency consideration)
• Moisture sensitivity: MSL 1 or equivalent (handling and storage)

The CDRH124NP-121MC meets all primary criteria and exceeds secondary electrical specifications, qualifying it as a direct substitute for the obsolete CDR125NP-121MC.

Parameter Comparison

Engineering Selection Recommendations

The CDRH124NP-121MC is the qualified substitute for the obsolete CDR125NP-121MC based on the following engineering factors:

Electrical Compatibility: Both components maintain identical inductance values of 120 µH at the specified test frequencies. The substitute's current rating of 1.1 A exceeds the original 950 mA requirement, providing operational margin. The DC resistance increase from 280 mOhm to 380 mOhm remains within acceptable limits for most power delivery and filtering applications.

Regulatory and Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity ratings, ensuring compatibility with modern manufacturing processes and supply chain handling requirements.

Production Status: The substitute component is in active production status, ensuring long-term availability and supply chain stability compared to the obsolete original part.

Packaging Advantage: The CDRH124NP-121MC is supplied in standard Tape & Reel packaging, improving procurement efficiency and reducing handling costs relative to nonstandard packaging.

Thermal Performance: Identical operating temperature ranges (-40°C to 100°C) ensure thermal envelope compatibility in target applications.

Frequently Asked Questions (FAQ)

Q: Can the CDRH124NP-121MC be used as a direct replacement for the CDR125NP-121MC in existing designs?

A: Yes. Both components share identical inductance values (120 µH), shielding configuration, operating temperature range, and regulatory compliance. The substitute's higher current rating (1.1 A vs. 950 mA) and increased DC resistance (380 mOhm vs. 280 mOhm) are compatible with applications designed for the original part.

Q: What is the impact of the increased DC resistance in the substitute part?

A: The DC resistance increase from 280 mOhm to 380 mOhm results in approximately 35% higher resistive losses. For applications where thermal dissipation is critical, this parameter should be evaluated against circuit power levels. For most filtering and energy storage applications, this increase remains within acceptable operational margins.

Q: Are there physical dimension differences between the two parts?

A: Yes. The CDR125NP-121MC measures 0.496" L × 0.457" W × 0.232" H (12.60mm × 11.60mm × 5.90mm), while the CDRH124NP-121MC measures 0.472" L × 0.472" W × 0.177" H (12.00mm × 12.00mm × 4.50mm). The substitute is slightly smaller in footprint and height, which may provide PCB layout advantages.

Q: What is the significance of the different inductance test frequencies?

A: The original part specifies inductance measurement at 1 kHz, while the substitute uses 100 kHz. Both measurements are valid for their respective component designs. The 100 kHz test frequency for the substitute reflects modern measurement standards and provides more relevant data for high-frequency circuit applications.

Q: Does the packaging change from nonstandard to Tape & Reel affect compatibility?

A: No. Tape & Reel packaging is a standard industry format that improves handling, storage, and automated assembly processes. This change represents an improvement in supply chain efficiency without affecting electrical or mechanical performance.

Q: Are both parts suitable for high-reliability applications?

A: Both components meet ROHS3 compliance and maintain MSL 1 ratings. The substitute's active production status provides better long-term availability for high-reliability programs requiring sustained component supply.