SCRH4D14R-220 Equivalent & Substitute Parts

Part Overview

The SCRH4D14R-220 is a 22 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 610 mA continuous current with a maximum DC resistance of 690 mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across the temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCRH4D14R-220

Signal TransformerIn Stock: 1104SCRH4D14R-220 Datasheet

Current PartRFQ

CDRH3D18NP-220NC

Sumida America Components Inc.In Stock: 3198CDRH3D18NP-220NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH4D14R-220 is based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance value: 22 µH (matching specification)
• Inductance tolerance: ±30% (matching specification)
• Current rating: minimum 600 mA (substitute must support primary circuit current requirements)
• DC resistance: lower or equivalent values acceptable (reduces power dissipation)
• Saturation current: minimum 420 mA (maintains performance under transient conditions)

Mechanical & Environmental Criteria:

• Mounting type: Surface Mount (package compatibility)
• Shielding: Shielded (electromagnetic interference control)
• Operating temperature range: minimum -40°C to 105°C (functional overlap with primary part)
• RoHS3 compliance: required (regulatory alignment)
• Moisture sensitivity: MSL 1 (handling and storage compatibility)

The CDRH3D18NP-220NC from Sumida America Components Inc. meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The CDRH3D18NP-220NC qualifies as a functional equivalent for the obsolete SCRH4D14R-220 based on the following factors:

Electrical Performance: Both components share identical inductance values (22 µH) and tolerance specifications (±30%), tested at 100 kHz. The substitute exhibits superior DC resistance characteristics (424 mOhm versus 690 mOhm), resulting in reduced power dissipation. The saturation current rating of the substitute (600 mA) exceeds the primary part's specification (420 mA), providing additional margin during transient conditions.

Current Handling: The substitute is rated for 600 mA continuous current, which is 10 mA below the primary part's 610 mA rating. This marginal difference is acceptable for applications where the circuit operates below the primary part's maximum specification.

Regulatory & Compliance: Both components maintain ROHS3 compliance and MSL 1 moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols.

Product Availability: The substitute is actively manufactured and maintained in inventory (3120 units available), whereas the primary part is obsolete. This ensures long-term procurement viability and supply chain stability.

Temperature Consideration: The substitute operates across -40°C to 105°C, which is 20°C narrower than the primary part at the upper temperature limit. Applications requiring operation above 105°C must evaluate thermal requirements against circuit design specifications.

Frequently Asked Questions (FAQ)

Q: Can the CDRH3D18NP-220NC directly replace the SCRH4D14R-220 in existing designs?

A: Yes, for applications operating within the substitute's temperature range (-40°C to 105°C) and current requirements (600 mA maximum). The electrical parameters—inductance, tolerance, and test frequency—are identical. The substitute's lower DC resistance provides improved performance characteristics.

Q: What is the significance of the 10 mA current rating difference?

A: The SCRH4D14R-220 is rated for 610 mA continuous current, while the CDRH3D18NP-220NC is rated for 600 mA. This 1.6% difference is negligible for most applications. However, designs operating at or near the primary part's maximum current specification should evaluate whether the substitute's 600 mA rating remains adequate for the intended circuit function.

Q: Why does the substitute have lower DC resistance?

A: The CDRH3D18NP-220NC exhibits 424 mOhm maximum DC resistance compared to the primary part's 690 mOhm. Lower DC resistance reduces resistive losses and heat generation during operation, which is a beneficial characteristic. This difference reflects different core materials and winding designs between manufacturers.

Q: Are there packaging or footprint differences between these components?

A: Both components are surface mount inductors with nonstandard packages. The primary part measures 0.161" × 0.161" (4.10mm × 4.10mm) with a maximum seated height of 0.059" (1.50mm). The substitute measures 0.150" × 0.150" (3.80mm × 3.80mm) with a maximum seated height of 0.079" (2.00mm). PCB layout verification is required to confirm mechanical compatibility.

Q: What is the impact of the narrower temperature range on the substitute?

A: The substitute operates to 105°C maximum, compared to the primary part's 125°C. For applications requiring operation above 105°C, the substitute is not suitable. For applications within -40°C to 105°C, the substitute performs identically to the primary part across this range.

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

A: The primary part is supplied in standard packaging, while the substitute is available in Tape & Reel (TR) format. This difference affects procurement and assembly processes but does not impact electrical or mechanical performance.