SCR105B-151 Equivalent & Substitute Parts

Part Overview

The SCR105B-151 is a 150 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 1.16 A and maximum DC resistance of 510mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCR105B-151

Signal TransformerIn Stock: 940SCR105B-151 Datasheet

Current PartRFQ

DR1050-151-R

Eaton - Electronics DivisionIn Stock: 5268DR1050-151-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCR105B-151 is determined by the following critical parameters:

• Inductance Value: Must be 150 µH (primary functional requirement)
• Shielding: Must be shielded to maintain electromagnetic isolation
• Mounting Type: Must be surface mount compatible
• Current Rating: Must meet or exceed 1.16 A continuous current capability
• Operating Temperature: Must support -40°C to 125°C range
• DC Resistance: Lower DCR values are acceptable as they represent improved performance
• Compliance: Must maintain ROHS3 and REACH compliance status

The DR1050-151-R qualifies as a direct substitute based on matching inductance value, shielding configuration, surface mount packaging, and operating temperature specifications. The substitute demonstrates superior electrical characteristics with higher current rating (1.26 A) and lower DC resistance (298 mOhm), while maintaining full regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The DR1050-151-R is the qualified substitute for the obsolete SCR105B-151. Selection of this substitute is supported by the following factors:

• Product Availability: The main part is obsolete with no ongoing manufacturing. The substitute is active production with 5244 units in stock, ensuring supply chain continuity.
• Electrical Compatibility: Both parts maintain identical 150 µH inductance at the specified test frequency. The substitute provides enhanced performance margins with 1.26 A current rating versus 1.16 A, and superior DC resistance characteristics (298 mOhm versus 510 mOhm).
• Regulatory Compliance: Both parts maintain ROHS3 and REACH compliance status, meeting environmental and safety requirements.
• Thermal Performance: Identical operating temperature range (-40°C to 125°C) ensures thermal compatibility in existing circuit designs.
• Physical Compatibility: Both parts use nonstandard surface mount packages with comparable footprint dimensions (10.50mm L x 9.50mm W for main part; 10.50mm L x 10.30mm W for substitute), suitable for PCB integration.

Frequently Asked Questions (FAQ)

Q: Can the DR1050-151-R be used as a direct replacement for the SCR105B-151 in existing designs?

A: Yes. Both inductors share the same 150 µH inductance value, shielded configuration, surface mount mounting type, and operating temperature range. The substitute meets all functional requirements for direct substitution.

Q: What is the significance of the different inductance tolerances (±20% vs ±30%)?

A: The SCR105B-151 specifies ±20% tolerance while the DR1050-151-R specifies ±30%. Both tolerances are acceptable for general inductor applications. Circuit designs must account for the applicable tolerance of the selected part during component selection.

Q: Why does the DR1050-151-R have lower DC resistance?

A: The DR1050-151-R uses a drum core, wirewound construction with ferrite core material, resulting in lower DC resistance (298 mOhm) compared to the SCR105B-151 (510 mOhm). Lower DCR reduces power dissipation and heat generation, representing an improvement in electrical performance.

Q: Are the physical dimensions compatible between these parts?

A: Both parts use nonstandard surface mount packages with similar footprint dimensions. The SCR105B-151 measures 10.50mm L x 9.50mm W x 5.50mm H (seated), while the DR1050-151-R measures 10.50mm L x 10.30mm W x 5.00mm H (seated). Verify PCB layout compatibility for the specific application.

Q: What is the difference in saturation current between these parts?

A: The SCR105B-151 has a saturation current of 550 mA, while the DR1050-151-R has 1.15 A. The substitute provides a higher saturation margin, allowing operation at higher current levels before saturation occurs.

Q: Are both parts RoHS compliant?

A: Yes. Both the SCR105B-151 and DR1050-151-R are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic components.