SCR105B-101 Equivalent & Substitute Parts

Part Overview

The SCR105B-101 is a 100 µH shielded inductor manufactured by Signal Transformer, rated for 1.42 A continuous current with a maximum DC resistance of 340mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain the same inductance value, current rating capability, and shielding characteristics while meeting or exceeding the original electrical performance specifications.

Substiute Parts

SCR105B-101

Signal TransformerIn Stock: 934SCR105B-101 Datasheet

Current PartRFQ

7447714101

Würth ElektronikIn Stock: 26447447714101 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCR105B-101 is determined by the following critical parameters:

Inductance Match: The substitute must provide 100 µH ±20% inductance, measured at the specified test frequency.

Current Rating: The substitute current rating must equal or exceed 1.42 A to support the same load conditions without thermal stress or saturation.

DC Resistance: Lower or equivalent DCR values are acceptable; the 340mOhm maximum specification establishes the upper limit for power dissipation compatibility.

Shielding Requirement: The substitute must be shielded to maintain electromagnetic isolation equivalent to the original design.

Environmental Compliance: The substitute must maintain the -40°C ~ 125°C operating temperature range and ROHS3 compliance status.

Mounting Configuration: Surface mount packaging is required for PCB integration compatibility.

The part 7447714101 (Würth Elektronik WE-PD Performance series) meets all substitution criteria and is classified as an active product with enhanced specifications.

Parameter Comparison

Engineering Selection Recommendations

The 7447714101 (Würth Elektronik WE-PD Performance series) is the qualified substitute for the obsolete SCR105B-101. Selection is based on the following engineering criteria:

Electrical Equivalence: Both components provide 100 µH inductance at ±20% tolerance with identical operating temperature ranges. The substitute demonstrates superior electrical performance with lower DC resistance (198mOhm vs. 340mOhm) and higher saturation current (1.8A vs. 720mA), reducing thermal dissipation and improving headroom for transient current conditions.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in production environments.

Product Status: The substitute is classified as active with AEC-Q200 automotive qualification, providing long-term availability and supply chain stability compared to the obsolete original part.

Mechanical Compatibility: Both components are surface mount inductors with shielded construction. Physical dimensions differ slightly (10.00mm x 10.00mm vs. 10.50mm x 9.50mm), requiring verification of PCB layout constraints and clearance requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can the 7447714101 be used as a direct replacement for the SCR105B-101?

A: The 7447714101 meets all electrical substitution criteria: identical 100 µH inductance, equal or superior current ratings, lower DC resistance, and matching operating temperature range. Physical dimensions differ slightly; PCB layout verification is required to confirm mechanical fit and clearance compatibility.

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

A: The 7447714101 exhibits 198mOhm maximum DCR compared to 340mOhm in the original part. Lower DC resistance reduces I²R power dissipation, resulting in lower operating temperature and improved thermal performance under the same current conditions.

Q: Are there differences in shielding effectiveness between these parts?

A: Both components are specified as shielded inductors. The original part uses unspecified core material, while the substitute employs ferrite drum core construction. Both provide electromagnetic shielding suitable for surface mount applications; specific shielding attenuation values are not provided in the available specifications.

Q: What packaging considerations apply to this substitution?

A: The original SCR105B-101 uses nonstandard packaging, while the 7447714101 is supplied in Tape & Reel (TR) format. This difference affects component handling, placement equipment compatibility, and inventory management. Verify that assembly equipment supports TR packaging before implementation.

Q: Is the substitute part qualified for automotive applications?

A: The 7447714101 carries AEC-Q200 qualification, indicating automotive-grade reliability testing. The original SCR105B-101 does not list automotive qualification. If automotive compliance is required, the substitute provides additional qualification assurance.

Q: What is the inductance test frequency difference between these parts?

A: The original part specifies inductance measurement at 1 kHz, while the substitute is tested at 100 kHz. Both maintain the same 100 µH nominal value at their respective test frequencies. Frequency-dependent inductance variation is not provided in the available specifications.