SCR105B-470 Equivalent & Substitute Parts

Part Overview

The SCR105B-470 is a 47 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 1.93 A and maximum DC resistance of 140mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across inductance value, current rating, and DC resistance parameters while meeting the same operating temperature and compliance requirements.

Substiute Parts

SCR105B-470

Signal TransformerIn Stock: 1149SCR105B-470 Datasheet

Current PartRFQ

7447714470

Würth ElektronikIn Stock: 22797447714470 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCR105B-470 is determined by the following critical parameters:

Inductance Value: Must be 47 µH with ±20% tolerance to maintain circuit functionality.

Current Rating: Substitute parts must support a minimum of 1.93 A to handle the design's current requirements without thermal stress or saturation.

DC Resistance: Maximum DCR of 140mOhm establishes the upper limit for power dissipation compatibility. Lower DCR values indicate improved performance characteristics.

Shielding: Shielded construction is required to maintain electromagnetic compatibility in the target application.

Operating Temperature Range: Must support -40°C to 125°C to ensure reliability across the specified thermal envelope.

Mounting Type: Surface mount configuration is mandatory for PCB assembly compatibility.

Compliance: RoHS3 compliance is required for regulatory alignment.

The substitute part 7447714470 (Würth Elektronik WE-PD Performance series) meets all these criteria with improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 7447714470 (Würth Elektronik WE-PD Performance series) is the qualified substitute for the obsolete SCR105B-470. This substitution is supported by:

Electrical Compatibility: The substitute maintains the 47 µH inductance value and ±20% tolerance specification. The higher current rating (2.2 A vs. 1.93 A) and improved saturation current (2.5 A vs. 1 A) provide enhanced performance margin without circuit modification.

Improved DC Resistance: The substitute's 99mOhm maximum DCR is superior to the original 140mOhm specification, resulting in lower power dissipation and improved thermal performance.

Regulatory Compliance: Both components are ROHS3 compliant and operate across the identical -40°C to 125°C temperature range, ensuring regulatory and thermal compatibility.

Product Status: The substitute is active in production with established supply chain availability (2207 pcs in stock), addressing the obsolescence of the original part.

Mechanical Compatibility: Both components are surface mount with nonstandard package dimensions. Physical verification of PCB footprint compatibility is required prior to implementation, as the substitute dimensions differ slightly (10.00mm x 10.00mm vs. 10.50mm x 9.50mm).

Frequently Asked Questions (FAQ)

Q: Can the 7447714470 be used as a direct replacement for the SCR105B-470?

A: The 7447714470 meets all electrical and compliance requirements for substitution. However, physical PCB footprint verification is necessary due to dimensional differences between the nonstandard packages. The substitute is slightly smaller (10.00mm x 10.00mm vs. 10.50mm x 9.50mm), which may require PCB layout adjustment.

Q: What are the key electrical advantages of the substitute part?

A: The 7447714470 provides a higher current rating (2.2 A vs. 1.93 A), improved saturation current (2.5 A vs. 1 A), and lower DC resistance (99mOhm vs. 140mOhm). These characteristics result in reduced power dissipation and improved thermal stability under load.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the SCR105B-470 and 7447714470 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both operate across the -40°C to 125°C temperature range.

Q: What is the significance of the product status difference?

A: The SCR105B-470 is obsolete and no longer in production, creating supply chain risk. The 7447714470 is active in production with established availability, ensuring long-term procurement continuity.

Q: Are there any performance differences in frequency response?

A: The substitute has a specified self-resonant frequency of 8.8 MHz and inductance test frequency of 100 kHz, compared to the original's 2.52 kHz test frequency. These differences reflect different measurement methodologies and do not affect substitution eligibility for the specified 47 µH inductance value.