SCR105B-150 Equivalent & Substitute Parts

Part Overview

The SCR105B-150 is a 15 µH shielded inductor manufactured by Signal Transformer, rated for 3.6 A continuous current with a maximum DC resistance of 70mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across the temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCR105B-150

Signal TransformerIn Stock: 936SCR105B-150 Datasheet

Current PartRFQ

1274AS-H-150M=P3

Murata ElectronicsIn Stock: 22971274AS-H-150M=P3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCR105B-150 is based on the following critical parameters:

• Inductance Value: 15 µH (±20% tolerance maintained)
• Current Rating: Minimum 3.6 A continuous current capability
• DC Resistance: Maximum 70 mOhm to preserve circuit performance
• Shielding: Shielded construction required
• Mounting: Surface mount configuration
• Compliance: ROHS3 and REACH compliance maintained

The substitute part 1274AS-H-150M=P3 meets these core electrical and mechanical requirements while offering improved performance characteristics in saturation current and reduced DC resistance.

Parameter Comparison

Engineering Selection Recommendations

The 1274AS-H-150M=P3 is a direct functional substitute for the SCR105B-150. Both components maintain identical inductance values and tolerance specifications. The substitute part exceeds the original part's current rating (3.9 A versus 3.6 A) and provides superior DC resistance performance (42.3 mOhm versus 70 mOhm maximum), resulting in lower power dissipation in the circuit.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part is currently in active production status, providing long-term availability and supply chain stability compared to the obsolete original part. The Murata Electronics part is available in higher inventory quantities, supporting production requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1274AS-H-150M=P3 directly replace the SCR105B-150 in existing designs?

A: Yes. Both parts share identical inductance values (15 µH), tolerance specifications (±20%), shielding configuration, and surface mount packaging. The substitute part meets or exceeds all critical electrical parameters of the original component.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (Signal Transformer versus Murata Electronics), product status (obsolete versus active), and performance characteristics. The substitute part offers higher current rating (3.9 A versus 3.6 A), higher saturation current (5.1 A versus 1.72 A), and lower DC resistance (42.3 mOhm versus 70 mOhm maximum).

Q: Are there any compliance or certification concerns with substitution?

A: No. Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity rating. Regulatory requirements are equivalent.

Q: Does the lower DC resistance of the substitute part affect circuit operation?

A: Lower DC resistance reduces power dissipation and heat generation in the inductor, which is beneficial for circuit performance and thermal management. This represents an improvement over the original part specification.

Q: What is the availability status of each part?

A: The SCR105B-150 is obsolete with limited remaining inventory (872 pieces). The 1274AS-H-150M=P3 is in active production with higher inventory availability (2207 pieces), ensuring reliable long-term supply.