SCRH4D14R-820 Equivalent & Substitute Parts

Part Overview

The SCRH4D14R-820 is a 82 µH shielded inductor manufactured by Signal Transformer, rated for 290 mA continuous current with a maximum DC resistance of 3 Ohm. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The part operates across the temperature range of -40°C to 125°C and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

SCRH4D14R-820

Signal TransformerIn Stock: 1195SCRH4D14R-820 Datasheet

Current PartRFQ

CDRH3D28/LDNP-820NC

Sumida America Components Inc.In Stock: 879CDRH3D28/LDNP-820NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH4D14R-820 is determined by the following critical parameters:

Inductance Value: Both the main part and substitute must maintain 82 µH at the specified test frequency of 100 kHz, with tolerance of ±30%.

Shielding Configuration: The shielded design is mandatory to maintain electromagnetic isolation in the target application.

Mounting Technology: Surface mount configuration is required for PCB compatibility.

Current Handling Capability: The substitute must support the application's current requirements. The SCRH4D14R-820 is rated for 290 mA continuous current with 190 mA saturation current.

DC Resistance: The substitute's DCR must be compatible with circuit impedance requirements. The original part specifies 3 Ohm maximum.

Environmental Compliance: ROHS3 compliance and MSL rating must be maintained for manufacturing and storage compatibility.

Parameter Comparison

Engineering Selection Recommendations

The CDRH3D28/LDNP-820NC from Sumida America Components Inc. is an active substitute for the obsolete SCRH4D14R-820. Both components share identical inductance values, tolerance specifications, and test frequency parameters. Both maintain ROHS3 compliance and unlimited MSL ratings, ensuring compatibility with current manufacturing and storage requirements.

The substitute provides superior current handling with a 580 mA rating compared to the original 290 mA specification, and significantly lower DC resistance at 540 mOhm maximum versus 3 Ohm maximum. These characteristics represent performance improvements for the application.

Physical dimensions differ between the two parts. The substitute measures 3.80mm x 3.80mm x 3.00mm compared to the original 4.10mm x 4.10mm x 1.50mm. PCB layout verification is required to confirm footprint compatibility within the available mounting space.

The substitute operates to 105°C maximum, compared to the original 125°C upper limit. Applications requiring operation above 105°C require alternative component selection.

Frequently Asked Questions (FAQ)

Q: Can the CDRH3D28/LDNP-820NC directly replace the SCRH4D14R-820 in all applications?

A: Direct replacement requires verification of three factors: PCB footprint compatibility given the different package dimensions, maximum operating temperature requirements (105°C limit for the substitute versus 125°C for the original), and confirmation that the lower saturation current of 172 mA does not impact circuit performance.

Q: What is the significance of the different DC resistance values?

A: The substitute's 540 mOhm DCR is substantially lower than the original 3 Ohm specification. This reduces resistive losses and heat generation in the inductor. Circuit designs dependent on the higher impedance of the original part require analysis to confirm the lower resistance does not alter intended circuit behavior.

Q: Are both components suitable for high-volume production?

A: The CDRH3D28/LDNP-820NC is classified as active product status with standard Tape & Reel packaging, supporting high-volume manufacturing. The SCRH4D14R-820 is obsolete and should not be specified for new designs.

Q: What are the core material differences?

A: The substitute specifies ferrite core material. The original part does not provide core material specification. Ferrite cores are standard for shielded surface-mount inductors and provide stable inductance across the operating temperature range.

Q: How do the saturation current specifications compare?

A: The original part saturates at 190 mA while the substitute saturates at 172 mA. Both values are below the respective continuous current ratings, indicating proper design margin. The substitute's lower saturation current requires confirmation that peak circuit currents remain below this threshold.