SCR63B-150 Equivalent & Substitute Parts

Part Overview

The SCR63B-150 is a 15 µH shielded inductor manufactured by Signal Transformer, rated for 1.37 A continuous current with a maximum DC resistance of 180mOhm. This component is designed for surface mount applications in nonstandard packaging. The part is currently obsolete, making identification of suitable substitutes necessary for ongoing production support, design updates, or inventory replenishment where equivalent performance characteristics are required.

Substiute Parts

SCR63B-150

Signal TransformerIn Stock: 938SCR63B-150 Datasheet

Current PartRFQ

74404063150

Würth ElektronikIn Stock: 1165174404063150 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCR63B-150 is based on the following critical parameters that must align for functional equivalence:

Primary Matching Criteria:

• Inductance value: 15 µH (±20% tolerance acceptable)
• Current rating: minimum 1.37 A continuous
• Saturation current: minimum 860 mA
• DC resistance: 180 mOhm or lower
• Operating temperature range: -40°C to 125°C minimum
• Surface mount configuration
• RoHS3 compliance

The substitute part 74404063150 (Würth Elektronik WE-LQS series) meets these electrical requirements with improved performance characteristics in several areas, including higher current rating (1.45 A), lower DC resistance (125 mOhm), and higher saturation current (1.9 A). Both parts maintain identical inductance values and temperature operating ranges.

Parameter Comparison

Engineering Selection Recommendations

The 74404063150 (Würth Elektronik WE-LQS) is a direct functional substitute for the obsolete SCR63B-150. Selection is supported by the following factors:

Electrical Compatibility: Both parts maintain 15 µH inductance with ±20% tolerance and identical -40°C to 125°C operating temperature ranges. The substitute provides superior electrical performance with 5.8% higher current rating, 120.9% higher saturation current, and 30.6% lower DC resistance, ensuring reliable operation within the original design envelope.

Compliance & Certifications: Both components are ROHS3 compliant and REACH unaffected. The substitute carries AEC-Q200 qualification, indicating automotive-grade reliability standards.

Product Status: The substitute is active production status with confirmed inventory availability (11,612 pcs), whereas the main part is obsolete. This ensures long-term supply chain continuity.

Packaging Consideration: The substitute is supplied in standard Tape & Reel (TR) packaging, improving handling and assembly efficiency compared to the nonstandard packaging of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 74404063150 directly replace the SCR63B-150 in existing designs?

A: Yes. Both parts share identical inductance values (15 µH), tolerance (±20%), and operating temperature ranges (-40°C to 125°C). The substitute meets or exceeds all electrical requirements of the original part, including current rating, saturation current, and DC resistance specifications.

Q: What is the difference between shielded and semi-shielded inductors?

A: Shielded inductors (SCR63B-150) provide complete magnetic field containment, while semi-shielded inductors (74404063150) offer partial containment with reduced EMI but slightly higher external field coupling. For most applications, semi-shielded performance is equivalent when inductance and current ratings match.

Q: Are there any thermal or frequency considerations for substitution?

A: Both parts operate across identical temperature ranges (-40°C to 125°C). The substitute has a self-resonant frequency of 24 MHz versus unspecified for the original part. For applications operating below 24 MHz, this presents no limitation.

Q: How does the lower DC resistance of the substitute affect circuit performance?

A: Lower DC resistance (125 mOhm vs. 180 mOhm) reduces resistive losses and heat generation, improving efficiency. This is a beneficial characteristic that does not compromise compatibility.

Q: What packaging advantages does the substitute offer?

A: The 74404063150 is supplied in standard Tape & Reel (TR) packaging, enabling automated assembly processes and reducing handling costs compared to nonstandard packaging.