CDRH124NP-390MC Equivalent & Substitute Parts

Part Overview

The CDRH124NP-390MC is a 39 µH shielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring moderate current handling at 2.1 A with controlled DC resistance of 132mOhm maximum. The component operates across an industrial temperature range of -40°C to 100°C and maintains Active product status with full RoHS3 compliance. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when alternative electrical characteristics better suit specific application requirements.

Substiute Parts

CDRH124NP-390MC

Sumida America Components Inc.In Stock: 1025CDRH124NP-390MC Datasheet

Current PartRFQ

SRR1240-390M

Bourns Inc.In Stock: 4163SRR1240-390M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDRH124NP-390MC is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 39 µH (±20% tolerance band)
• Current rating: minimum 2.1 A
• DC resistance: 132mOhm maximum
• Shielding: Shielded configuration required
• Core material: Ferrite
• Mounting: Surface Mount
• Package: Nonstandard form factor
• Compliance: RoHS3 Compliant

The SRR1240-390M from Bourns Inc. qualifies as a direct substitute based on matching inductance, exceeding current rating specifications, maintaining shielded ferrite core construction, and meeting all regulatory compliance requirements. Dimensional compatibility and thermal operating range are verified within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

CDRH124NP-390MC Selection: Choose the primary CDRH124NP-390MC when Sumida component availability is confirmed and inventory levels support production schedules. This part maintains Active product status with established supply chain presence and full RoHS3 compliance certification.

SRR1240-390M Selection: The SRR1240-390M from Bourns Inc. serves as the qualified substitute when CDRH124NP-390MC availability is constrained. This alternative provides measurable advantages: current rating of 2.15 A exceeds the 2.1 A requirement, DC resistance of 120mOhm maximum is lower than the 132mOhm specification, and operating temperature range extends to 125°C compared to 100°C. Both components maintain identical inductance values, tolerance bands, shielding configurations, and RoHS3 compliance status. The SRR1240-390M carries Active product status with higher inventory availability (4064 pcs vs 1009 pcs).

Both parts are suitable for direct substitution in applications where the specified electrical parameters and environmental conditions are met.

Frequently Asked Questions (FAQ)

Q: Can the SRR1240-390M replace the CDRH124NP-390MC in all applications?

A: Yes, the SRR1240-390M qualifies as a direct substitute. Both components share identical inductance values (39 µH), tolerance specifications (±20%), shielding configuration, core material (ferrite), and RoHS3 compliance. The substitute meets or exceeds all electrical requirements of the primary part.

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

A: The SRR1240-390M provides three measurable improvements: current rating of 2.15 A versus 2.1 A, lower DC resistance of 120mOhm maximum versus 132mOhm maximum, and extended operating temperature range to 125°C versus 100°C. Physical dimensions differ slightly (12.50mm x 12.50mm versus 12.00mm x 12.00mm), though both maintain identical 4.50mm seated height.

Q: Are there any package or mounting compatibility concerns?

A: Both components are classified as Nonstandard package types with Surface Mount configuration. Physical dimensions are comparable with minimal variation. PCB layout and footprint design should accommodate the slight dimensional difference in the SRR1240-390M (0.492" x 0.492" versus 0.472" x 0.472").

Q: What is the inductance tolerance band for these parts?

A: Both the CDRH124NP-390MC and SRR1240-390M carry ±20% inductance tolerance. This tolerance band defines the acceptable range of inductance values around the nominal 39 µH specification.

Q: Do both parts meet environmental and compliance requirements?

A: Yes. Both components are RoHS3 compliant, carry MSL rating of 1 (Unlimited moisture sensitivity level), and operate across industrial temperature ranges. The SRR1240-390M extends the upper temperature limit to 125°C, providing additional thermal margin for demanding applications.

Q: What DC resistance values should be expected?

A: The CDRH124NP-390MC specifies 132mOhm maximum DC resistance. The SRR1240-390M specifies 120mOhm maximum, representing approximately 9% lower resistance. This difference may provide marginal benefits in applications sensitive to inductor losses.