CDR74BNP-121KC Equivalent & Substitute Parts

Part Overview

The CDR74BNP-121KC is a 120 µH shielded surface mount inductor manufactured by Sumida America Components Inc. This component is rated for 490 mA continuous current with a maximum DC resistance of 680 mOhm and operates across the temperature range of -25°C to 80°C. The part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement continuity.

Substiute Parts

CDR74BNP-121KC

Sumida America Components Inc.In Stock: 1036CDR74BNP-121KC Datasheet

Current PartRFQ

CDRH74NP-121MC-B

Sumida America Components Inc.In Stock: 726CDRH74NP-121MC-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR74BNP-121KC is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 120 µH (exact match required)
• Inductance tolerance: ±10% to ±20% acceptable range
• Current rating: minimum 490 mA (higher ratings acceptable)
• DC resistance: 680 mOhm maximum (lower values acceptable)
• Shielding: Shielded configuration required
• Core material: Ferrite
• Mounting type: Surface Mount
• Operating temperature range: must encompass or exceed -25°C ~ 80°C
• RoHS compliance: ROHS3 Compliant

The CDRH74NP-121MC-B meets all substitution criteria with improved electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The CDRH74NP-121MC-B is the qualified substitute for the obsolete CDR74BNP-121KC. Selection is based on the following engineering factors:

Electrical Compatibility: The substitute maintains the 120 µH inductance specification with equivalent shielded ferrite core construction. The current rating of 520 mA exceeds the original 490 mA requirement, and the DC resistance of 660 mOhm is lower than the 680 mOhm maximum, providing improved electrical performance.

Thermal Performance: The substitute operates across -40°C to 100°C, which encompasses and exceeds the original operating range of -25°C to 80°C, providing enhanced thermal margin.

Compliance & Availability: The substitute is ROHS3 compliant with MSL 1 rating, matching the original part's environmental specifications. The active product status ensures ongoing availability and supply chain continuity.

Physical Considerations: The substitute features a more compact footprint (7.30mm x 7.30mm versus 7.80mm x 7.00mm) and reduced height (4.50mm versus 4.90mm), which may require PCB layout verification for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the CDRH74NP-121MC-B directly replace the CDR74BNP-121KC in existing designs?

A: The CDRH74NP-121MC-B meets all critical electrical parameters for substitution. However, the reduced physical dimensions require verification that the component footprint is compatible with existing PCB layouts. The inductance tolerance increases from ±10% to ±20%, which must be evaluated against circuit performance requirements.

Q: What are the key differences between these two inductors?

A: The primary differences are: (1) Product status—the substitute is active versus obsolete; (2) Current rating—520 mA versus 490 mA; (3) DC resistance—660 mOhm versus 680 mOhm; (4) Operating temperature range—-40°C to 100°C versus -25°C to 80°C; (5) Physical dimensions—7.30mm x 7.30mm x 4.50mm versus 7.80mm x 7.00mm x 4.90mm; (6) Inductance tolerance—±20% versus ±10%.

Q: Are both parts RoHS compliant?

A: Yes, both the CDR74BNP-121KC and CDRH74NP-121MC-B are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the inductance frequency test condition?

A: Both parts are tested at 1 kHz for inductance measurement.

Q: Does the substitute part have a lower self-resonant frequency?

A: The self-resonant frequency for the CDRH74NP-121MC-B is not specified in the provided data. The original part specifies 7.3 MHz. This parameter should be confirmed with the manufacturer if high-frequency performance is critical to the application.

Q: Is the substitute available in the same packaging format?

A: The CDR74BNP-121KC uses standard packaging, while the CDRH74NP-121MC-B is supplied in Tape & Reel (TR) format, which is standard for production environments and offers no functional difference in the component itself.