SCR105B-220 Equivalent & Substitute Parts

Part Overview

The SCR105B-220 is a 22 µH shielded inductor manufactured by Signal Transformer, rated for 2.92 A continuous current with a maximum DC resistance of 80mOhm. This component is designed for surface mount applications in compact form factors. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing production and maintenance applications.

Substiute Parts

SCR105B-220

Signal TransformerIn Stock: 1083SCR105B-220 Datasheet

Current PartRFQ

1274AS-H-220M=P3

Murata ElectronicsIn Stock: 7791274AS-H-220M=P3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCR105B-220 is determined by the following critical parameters:

• Inductance Value: 22 µH with ±20% tolerance
• Current Rating: Minimum 2.9 A continuous current capability
• DC Resistance: Maximum 80 mOhm to maintain thermal and efficiency characteristics
• Shielding: Shielded construction required
• Mounting: Surface mount configuration
• Environmental Compliance: ROHS3 compliance and MSL 1 rating

The substitute part 1274AS-H-220M=P3 meets these criteria with equivalent inductance, comparable current rating, lower DC resistance, and identical environmental compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 1274AS-H-220M=P3 is a direct functional equivalent for the SCR105B-220. Both components share identical inductance values and tolerance specifications. The substitute part demonstrates superior performance characteristics with lower DC resistance (68.1 mOhm versus 80 mOhm maximum) and higher saturation current (4.2 A versus 1.42 A), providing improved thermal efficiency and current handling margin.

Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements. The substitute part is currently in active production status, providing supply continuity and long-term availability advantages over the obsolete SCR105B-220.

Frequently Asked Questions (FAQ)

Q: Can the 1274AS-H-220M=P3 directly replace the SCR105B-220 in existing designs?

A: Yes. Both inductors share the same 22 µH inductance value with ±20% tolerance, equivalent current ratings, and shielded surface mount construction. The substitute part meets or exceeds all specified electrical parameters.

Q: What are the physical dimension differences between these parts?

A: The SCR105B-220 measures 10.50mm L × 9.50mm W × 5.50mm H (seated). The 1274AS-H-220M=P3 measures 10.00mm L × 10.00mm W × 5.00mm H (seated). Both are nonstandard package sizes; verify PCB layout compatibility before implementation.

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

A: Lower DC resistance (68.1 mOhm versus 80 mOhm maximum) reduces resistive losses and heat generation, providing improved efficiency. This represents a performance enhancement rather than a deviation from the original specification.

Q: Are there supply chain considerations for this substitution?

A: The SCR105B-220 is obsolete with limited remaining inventory. The 1274AS-H-220M=P3 is in active production, ensuring reliable long-term availability and consistent lead times for procurement.

Q: What packaging format is available for the substitute part?

A: The 1274AS-H-220M=P3 is supplied in Tape & Reel (TR) format, standard for automated assembly processes.