SCRH2D18-6R8 Equivalent & Substitute Parts

Part Overview

The SCRH2D18-6R8 is a 6.8 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 1.29 A continuous current with a maximum DC resistance of 123 mOhm. This component is designed for applications requiring compact, shielded inductance in nonstandard packaging. The part maintains Active product status and is ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

SCRH2D18-6R8

Signal TransformerIn Stock: 1146SCRH2D18-6R8 Datasheet

Current PartRFQ

CDRH2D18/LDNP-6R8NC

Sumida America Components Inc.In Stock: 6519CDRH2D18/LDNP-6R8NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH2D18-6R8 is determined by the following critical parameters:

• Inductance Value: Must be 6.8 µH within ±30% tolerance
• Current Rating: Must support minimum 1.29 A continuous current
• DC Resistance: Must not exceed 123 mOhm at rated current
• Saturation Current: Must be at least 500 mA
• Shielding: Must be shielded to maintain EMI performance
• Mounting Type: Must be Surface Mount compatible
• Package Dimensions: Must fit within or match the 3.20 x 3.20 x 2.00 mm envelope
• Operating Temperature: Must support the -40°C to 125°C range or a subset thereof
• Compliance: Must maintain ROHS3 compliance

The CDRH2D18/LDNP-6R8NC from Sumida America Components Inc. meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the SCRH2D18-6R8 and CDRH2D18/LDNP-6R8NC are Active status components with ROHS3 compliance, confirming their suitability for current manufacturing environments. The Sumida substitute offers improved electrical characteristics: lower DC resistance (106 mOhm vs. 123 mOhm) and higher current rating (1.32 A vs. 1.29 A), resulting in reduced power dissipation and enhanced thermal performance. The smaller physical footprint (3.00 x 3.00 mm vs. 3.20 x 3.20 mm) provides layout flexibility without compromising performance.

The operating temperature range of the Sumida part (-40 to 105°C) is narrower than the Signal Transformer part (-40 to 125°C). Selection between these parts should be based on the specific application's maximum operating temperature requirement. For applications operating above 105°C, the SCRH2D18-6R8 remains the appropriate choice. For applications within the -40 to 105°C range, the CDRH2D18/LDNP-6R8NC is a direct substitute with performance advantages.

Frequently Asked Questions (FAQ)

Q: Can the CDRH2D18/LDNP-6R8NC replace the SCRH2D18-6R8 in all applications?

A: The Sumida part is a direct substitute for applications operating within -40 to 105°C. If your application requires operation above 105°C, the Signal Transformer part must be retained. All other electrical and mechanical parameters are compatible or superior in the Sumida part.

Q: What is the significance of the lower DC resistance in the substitute part?

A: Lower DC resistance (106 mOhm vs. 123 mOhm) reduces resistive losses and heat generation at the same current levels. This improves efficiency and thermal performance, particularly in current-limited applications.

Q: Are the physical dimensions compatible for PCB layout?

A: The Sumida part has a smaller footprint (3.00 x 3.00 mm vs. 3.20 x 3.20 mm) with identical height (2.00 mm). Both parts are nonstandard package types. Verify that your PCB layout accommodates the smaller footprint; the Sumida part will fit in the same mounting area with additional clearance.

Q: Do both parts have identical moisture sensitivity?

A: Yes. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and carry EAR99 ECCN classification. The Signal Transformer part is REACH Unaffected; the Sumida part is REACH Vendor Undefined. Verify REACH compliance requirements with your supply chain if applicable to your end market.