SCRH4D14R-180 Equivalent & Substitute Parts

Part Overview

The SCRH4D14R-180 is a 18 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 680 mA continuous current with a maximum DC resistance of 515 mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

SCRH4D14R-180

Signal TransformerIn Stock: 794SCRH4D14R-180 Datasheet

Current PartRFQ

CDRH3D28/LDNP-180NC

Sumida America Components Inc.In Stock: 755CDRH3D28/LDNP-180NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CDRH3D28/LDNP-180NC qualifies as a functional equivalent based on the following critical parameters:

Inductance value matches at 18 µH with identical ±30% tolerance. Current rating of 1.37 A exceeds the original 680 mA requirement, providing margin for thermal and operational headroom. DC resistance of 125 mOhm is significantly lower than the 515 mOhm maximum of the original part, resulting in reduced power dissipation. Both components are shielded surface mount inductors tested at 100 kHz. Both maintain ROHS3 compliance and MSL 1 rating. The substitute part carries active product status from Sumida America Components Inc., ensuring ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The CDRH3D28/LDNP-180NC is the designated manufacturer-recommended substitute for the obsolete SCRH4D14R-180. Selection of this part is supported by active product status, ensuring long-term supply availability and manufacturing support. Both components maintain identical ROHS3 and MSL 1 compliance certifications, satisfying regulatory and environmental requirements. The substitute part delivers superior electrical performance with lower DC resistance and higher current rating capacity, reducing thermal stress in the application circuit. PCB layout modifications may be required due to dimensional differences: the substitute is 0.011" smaller in length and width but 0.059" taller in seated height. These physical variations must be evaluated against available board space and thermal management requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can CDRH3D28/LDNP-180NC be used as a direct replacement for SCRH4D14R-180?

A: The CDRH3D28/LDNP-180NC is electrically compatible as a substitute. Both components share identical inductance values, tolerance, and test frequency. However, physical dimensions differ, requiring PCB layout verification before implementation.

Q: What are the key electrical differences between these parts?

A: The substitute part offers lower DC resistance (125 mOhm vs. 515 mOhm) and higher current rating (1.37 A vs. 680 mA). These improvements reduce power dissipation and provide operational margin. The saturation current differs (350 mA vs. 470 mA), which may affect performance in current-limited applications.

Q: Are there packaging differences?

A: The original part uses nonstandard packaging, while the substitute is supplied in Tape & Reel format. Both are surface mount components with identical mounting type. Footprint compatibility requires verification due to dimensional variations.

Q: Do both parts meet the same compliance standards?

A: Both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental requirements are equivalent.

Q: What is the operating temperature difference?

A: The original part operates from -40°C to 125°C, while the substitute operates from -40°C to 105°C. Applications requiring operation above 105°C must evaluate thermal requirements against the substitute's upper temperature limit.