SCR105B-100 Equivalent & Substitute Parts

Part Overview

The SCR105B-100 is a 10 µH shielded inductor manufactured by Signal Transformer, rated for 4.4 A continuous current with a maximum DC resistance of 60mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The part operates across the temperature range of -40°C to 125°C and is fully RoHS3 compliant.

Substiute Parts

SCR105B-100

Signal TransformerIn Stock: 1183SCR105B-100 Datasheet

Current PartRFQ

DD1274AS-H-100M=P3

Murata ElectronicsIn Stock: 1405DD1274AS-H-100M=P3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCR105B-100 is determined by the following critical parameters:

• Inductance Value: 10 µH with ±20% tolerance
• Current Rating: Minimum 4.4 A continuous current capability
• DC Resistance: Maximum 60mOhm (lower values are acceptable)
• Shielding: Shielded construction required
• Mounting: Surface mount configuration
• Temperature Range: Operating capability within -40°C to 125°C
• Compliance: RoHS3 and REACH compliance maintained

The DD1274AS-H-100M=P3 from Murata Electronics meets these substitution criteria with equivalent inductance, current rating, and shielding characteristics. The substitute part demonstrates superior DC resistance performance (30.4mOhm versus 60mOhm maximum) and higher saturation current (6.2 A versus 2.06 A), providing enhanced electrical performance margins.

Parameter Comparison

Engineering Selection Recommendations

The DD1274AS-H-100M=P3 is the qualified substitute for the SCR105B-100. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part is currently in active production status with confirmed inventory availability, addressing the obsolescence of the original component.

The Murata part exhibits improved electrical characteristics with reduced DC resistance and higher saturation current, providing superior performance within the same form factor and mounting configuration. The operating temperature range of the substitute extends to 105°C, which covers the majority of standard industrial applications; however, designs requiring operation above 105°C must retain the original SCR105B-100 specification or seek alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the DD1274AS-H-100M=P3 be used as a direct replacement for the SCR105B-100?

A: Yes. Both components share identical inductance values (10 µH), current ratings (4.4 A), tolerance specifications (±20%), and shielding characteristics. The substitute part meets all electrical and mechanical requirements for direct substitution in standard applications.

Q: What are the differences in DC resistance between these parts?

A: The SCR105B-100 specifies a maximum DC resistance of 60mOhm, while the DD1274AS-H-100M=P3 specifies 30.4mOhm maximum. The lower resistance of the substitute part reduces power dissipation and heat generation, representing an improvement over the original design.

Q: Are there temperature range limitations with the substitute part?

A: The DD1274AS-H-100M=P3 operates from -40°C to 105°C, compared to the SCR105B-100 range of -40°C to 125°C. Applications requiring sustained operation above 105°C should verify compatibility or maintain the original specification.

Q: Do both parts use the same packaging and mounting configuration?

A: Both components are surface mount inductors with nonstandard package dimensions. The SCR105B-100 measures 0.413" L × 0.374" W × 0.217" H (10.50mm × 9.50mm × 5.50mm), while the DD1274AS-H-100M=P3 measures 0.394" L × 0.394" W × 0.197" H (10.00mm × 10.00mm × 5.00mm). Physical layout verification is required before implementation.

Q: What is the saturation current difference, and does it affect substitution?

A: The DD1274AS-H-100M=P3 provides a saturation current of 6.2 A compared to 2.06 A for the SCR105B-100. This higher saturation current in the substitute part indicates improved performance margin and does not restrict substitution compatibility.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the SCR105B-100 and DD1274AS-H-100M=P3 are ROHS3 compliant and REACH unaffected, maintaining full regulatory compliance for EU and international markets.