SCRH8D28-3R3 Equivalent & Substitute Parts

Part Overview

The SCRH8D28-3R3 is a 3.3 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 4 A continuous current with a maximum DC resistance of 18.2 mOhm. This component is designed for applications requiring compact, shielded inductance in nonstandard package configurations. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial electronic assemblies operating across the -40°C to 125°C temperature range.

Equivalent and substitute parts are identified to address inventory availability, lead time constraints, or design optimization requirements while maintaining electrical and mechanical compatibility within specified tolerances.

Substiute Parts

SCRH8D28-3R3

Signal TransformerIn Stock: 1212SCRH8D28-3R3 Datasheet

Current PartRFQ

CDRH8D28NP-3R3NC

Sumida America Components Inc.In Stock: 6562CDRH8D28NP-3R3NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH8D28-3R3 is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Inductance value must match: 3.3 µH
• Inductance tolerance must be within ±30%
• DC resistance must not exceed 18.2 mOhm maximum
• Current saturation rating must support minimum 4 A operation
• Shielding configuration must be shielded

Mechanical & Environmental Compatibility Criteria:

• Mounting type must be surface mount
• Package footprint must be compatible with nonstandard 8.30mm × 8.30mm (or equivalent) placement
• Operating temperature range must encompass or exceed -40°C to 125°C
• RoHS3 compliance required for regulatory alignment

Test Conditions:

• Inductance measured at 100 kHz test frequency

The CDRH8D28NP-3R3NC from Sumida America Components Inc. meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

The CDRH8D28NP-3R3NC is qualified as a direct substitute for the SCRH8D28-3R3 based on the following engineering factors:

Electrical Performance: Both parts maintain identical inductance (3.3 µH ±30%), DC resistance (18.2 mOhm maximum), and saturation current (4 A). The Sumida part offers a higher continuous current rating (6 A versus 4 A), providing additional design margin without compromising electrical characteristics.

Regulatory Compliance: Both components are ROHS3 compliant with EAR99 export classification, ensuring equivalent regulatory standing for industrial and commercial applications.

Environmental Suitability: The Sumida substitute operates across -40°C to 100°C, which covers the majority of the original part's temperature range. Applications requiring operation above 100°C must retain the Signal Transformer SCRH8D28-3R3.

Physical Compatibility: The Sumida part features a slightly smaller footprint (8.00 × 8.00 mm versus 8.30 × 8.30 mm) and lower profile (3.00 mm versus 3.20 mm), offering potential benefits for space-constrained designs while maintaining surface mount compatibility.

Product Status: Both parts are active in production with established inventory availability, supporting consistent supply chain performance.

Frequently Asked Questions (FAQ)

Q: Can the CDRH8D28NP-3R3NC be used in place of the SCRH8D28-3R3 in all applications?

A: The Sumida substitute is electrically and mechanically compatible for applications operating within -40°C to 100°C. Applications requiring operation above 100°C must use the original Signal Transformer part, which is rated to 125°C.

Q: What is the significance of the higher 6 A current rating on the Sumida part?

A: The 6 A continuous current rating on the CDRH8D28NP-3R3NC provides additional thermal margin compared to the 4 A rating of the SCRH8D28-3R3. Both parts share the same 4 A saturation current, so the higher continuous rating does not alter saturation behavior but may reduce operating temperature rise in current-limited applications.

Q: Are there physical placement differences between these parts?

A: The Sumida part is slightly smaller (8.00 × 8.00 mm versus 8.30 × 8.30 mm) and has a lower profile (3.00 mm versus 3.20 mm). Both are surface mount nonstandard packages. PCB layout verification is recommended for designs with tight component spacing.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SCRH8D28-3R3 and CDRH8D28NP-3R3NC are ROHS3 compliant, carry EAR99 export classification, and have unlimited moisture sensitivity rating (MSL 1).

Q: What is the inductance test frequency for these parts?

A: Inductance is measured and specified at 100 kHz for both components.

Q: Are there any differences in core material?

A: The Sumida CDRH8D28NP-3R3NC specifies ferrite core material. The Signal Transformer SCRH8D28-3R3 does not specify core material in the provided data. Both parts are shielded inductors with identical electrical performance at the specified test frequency.