SCRH4D14R-680 Equivalent & Substitute Parts

Part Overview

The SCRH4D14R-680 is a 68 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 330 mA continuous current with a maximum DC resistance of 2.65Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across the temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCRH4D14R-680

Signal TransformerIn Stock: 979SCRH4D14R-680 Datasheet

Current PartRFQ

CDRH3D28/LDNP-680NC

Sumida America Components Inc.In Stock: 814CDRH3D28/LDNP-680NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH4D14R-680 is determined by the following critical parameters:

Inductance Value: 68 µH with ±30% tolerance establishes the primary functional requirement. Substitute parts must maintain this inductance specification.

Current Rating: The original part is rated for 330 mA continuous current. Substitute parts must meet or exceed this current handling capability to ensure equivalent or superior performance in the application circuit.

DC Resistance (DCR): The maximum DCR of 2.65Ohm is a key electrical characteristic affecting power dissipation and circuit efficiency. Substitute parts with lower DCR values provide improved performance characteristics.

Shielding: Both the main part and substitute must be shielded to maintain electromagnetic compatibility and prevent interference in sensitive circuit applications.

Mounting Type and Package: Surface mount configuration with nonstandard package dimensions (4.10mm x 4.10mm footprint, 1.50mm max height) must be preserved for PCB layout compatibility.

Operating Temperature Range: The substitute part must support the required temperature range to ensure reliable operation across specified environmental conditions.

Compliance Standards: RoHS3 compliance and MSL rating must be maintained for regulatory and manufacturing process requirements.

Parameter Comparison

Engineering Selection Recommendations

The CDRH3D28/LDNP-680NC from Sumida America Components Inc. is an active product substitute for the obsolete SCRH4D14R-680. Both parts maintain identical inductance values (68 µH) and tolerance specifications (±30%), with testing performed at 100 kHz.

The substitute part provides superior current handling capability at 600 mA versus the original 330 mA rating, offering increased design margin for the application. The DC resistance of the substitute is significantly lower at 470mOhm maximum compared to 2.65Ohm maximum, resulting in reduced power dissipation and improved circuit efficiency.

Both parts are shielded surface mount components with RoHS3 compliance and MSL rating of 1 (Unlimited), meeting regulatory and manufacturing requirements. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

Physical dimensions differ slightly: the substitute footprint is 3.80mm x 3.80mm versus 4.10mm x 4.10mm for the original, with increased seated height of 3.00mm versus 1.50mm. PCB layout verification is required to confirm compatibility with existing design constraints.

The substitute part operates across -40°C to 105°C, which is 20°C lower than the original part's maximum temperature specification of 125°C. Application thermal requirements must be evaluated to ensure the reduced upper temperature limit is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the CDRH3D28/LDNP-680NC directly replace the SCRH4D14R-680 without circuit modifications?

A: Both parts share identical inductance values (68 µH) and tolerance specifications (±30%), tested at 100 kHz. However, physical dimensions differ: the substitute is 3.80mm x 3.80mm with 3.00mm height versus 4.10mm x 4.10mm with 1.50mm height for the original. PCB layout compatibility must be confirmed before implementation.

Q: What are the implications of the lower DC resistance in the substitute part?

A: The substitute part exhibits 470mOhm maximum DCR compared to 2.65Ohm maximum for the original. This represents significantly lower resistive losses, resulting in reduced power dissipation and improved overall circuit efficiency. This is a favorable characteristic for the application.

Q: Does the substitute part meet the same compliance requirements?

A: Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited). Regulatory and manufacturing process requirements are equivalent between the two parts.

Q: What is the significance of the saturation current difference?

A: The original part has Isat of 200 mA while the substitute has Isat of 185 mA. Both values are below the respective continuous current ratings (330 mA and 600 mA), indicating adequate design margin in both cases.

Q: Is the reduced operating temperature range of the substitute part a concern?

A: The substitute operates from -40°C to 105°C versus -40°C to 125°C for the original. The 20°C reduction in maximum temperature must be evaluated against application thermal requirements to determine acceptability.

Q: What packaging format is available for the substitute part?

A: The CDRH3D28/LDNP-680NC is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.