SCR105B-680 Equivalent & Substitute Parts

Part Overview

The SCR105B-680 is a 68 µH shielded inductor manufactured by Signal Transformer, rated for 1.66 A continuous current with a maximum DC resistance of 210mOhm. 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 industrial temperature range of -40°C to 125°C and is RoHS3 compliant.

Substiute Parts

SCR105B-680

Signal TransformerIn Stock: 886SCR105B-680 Datasheet

Current PartRFQ

7447714680

Würth ElektronikIn Stock: 22387447714680 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCR105B-680 is based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Inductance value: 68 µH ±20%
• Current rating: minimum 1.66 A continuous
• DC resistance: 210 mOhm or lower
• Shielding: Shielded construction required
• Operating temperature: -40°C to 125°C minimum
• Mounting: Surface mount configuration
• Compliance: RoHS3 compliant

The substitute part 7447714680 (Würth Elektronik WE-PD Performance series) meets all primary criteria with improved electrical performance characteristics, including higher current rating (1.9 A), lower DC resistance (132 mOhm), and higher saturation current (2.2 A).

Parameter Comparison

Engineering Selection Recommendations

The 7447714680 substitute part is qualified for direct replacement based on the following factors:

Compliance & Availability: The substitute is an active product with confirmed inventory (2212 pcs), whereas the original SCR105B-680 is obsolete. Both parts maintain RoHS3 compliance and REACH unaffected status.

Electrical Performance: The substitute provides superior electrical characteristics within the same inductance specification. The lower DC resistance (132 mOhm vs. 210 mOhm) reduces power dissipation, while the higher current rating (1.9 A vs. 1.66 A) and saturation current (2.2 A vs. 850 mA) provide increased design margin.

Mechanical Compatibility: Both parts are surface mount, shielded inductors with identical inductance values and tolerance specifications. Operating temperature ranges are identical across the industrial range.

Quality Assurance: The substitute part carries AEC-Q200 automotive qualification, providing additional reliability assurance beyond the original part specification.

Frequently Asked Questions (FAQ)

Q: Can the 7447714680 be used as a direct replacement for SCR105B-680?

A: Yes. Both parts share identical inductance (68 µH ±20%), operating temperature range (-40°C to 125°C), shielding configuration, and surface mount packaging. The substitute meets or exceeds all electrical requirements of the original part.

Q: What are the key differences between these parts?

A: The substitute offers improved performance: lower DC resistance (132 mOhm vs. 210 mOhm), higher current rating (1.9 A vs. 1.66 A), and higher saturation current (2.2 A vs. 850 mA). The substitute is also an active product with confirmed availability, whereas the original is obsolete.

Q: Are there any package dimension concerns?

A: Both parts use nonstandard surface mount packages. The substitute dimensions are 10.00mm L x 10.00mm W x 5.00mm H (seated), compared to the original 10.50mm L x 9.50mm W x 5.50mm H (seated). Verify PCB layout compatibility before implementation.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. The substitute additionally carries AEC-Q200 automotive qualification.

Q: What is the inductance test frequency for each part?

A: The original part is tested at 2.52 kHz, while the substitute is tested at 100 kHz. Both maintain the specified 68 µH inductance value within ±20% tolerance at their respective test frequencies.