SCR105B-330 Equivalent & Substitute Parts

Part Overview

The SCR105B-330 is a 33 µH shielded inductor manufactured by Signal Transformer, rated for 2.37 A continuous current with a maximum DC resistance of 110mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. Substitute parts must maintain the specified inductance value, current rating, shielding characteristics, and operating temperature range to ensure direct compatibility in existing circuit applications.

Substiute Parts

SCR105B-330

Signal TransformerIn Stock: 816SCR105B-330 Datasheet

Current PartRFQ

1274AS-H-330M=P3

Murata ElectronicsIn Stock: 37861274AS-H-330M=P3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCR105B-330 is determined by the following critical parameters:

• Inductance Value: 33 µH ±20% tolerance
• Current Rating: Minimum 2.37 A continuous current capability
• DC Resistance: Maximum 110mOhm to maintain circuit performance
• Shielding: Shielded construction required
• Mounting: Surface mount package
• Environmental Compliance: ROHS3 compliant, MSL 1 rating

The substitute part 1274AS-H-330M=P3 meets all specified criteria with equivalent inductance, superior current rating (2.5 A), lower DC resistance (93.6mOhm), and identical environmental certifications.

Parameter Comparison

Engineering Selection Recommendations

The 1274AS-H-330M=P3 is a direct functional substitute for the SCR105B-330. Both components share identical inductance values and tolerance specifications. The substitute provides improved electrical performance with higher saturation current (4.6 A vs. 1.16 A) and lower DC resistance (93.6mOhm vs. 110mOhm), resulting in reduced power dissipation and enhanced current handling capability.

Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity ratings, ensuring equivalent environmental and regulatory compatibility. The substitute part is currently in active production status, providing long-term availability and supply chain stability compared to the obsolete original component.

Frequently Asked Questions (FAQ)

Q: Can the 1274AS-H-330M=P3 be used as a direct replacement for SCR105B-330?

A: Yes. Both components have identical 33 µH inductance values with ±20% tolerance and equivalent shielding characteristics. The substitute meets or exceeds all critical electrical parameters required for the original application.

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

A: The primary differences are manufacturer origin, DC resistance (93.6mOhm vs. 110mOhm), saturation current (4.6 A vs. 1.16 A), and product status (active vs. obsolete). The substitute offers superior electrical performance with lower resistance and higher saturation current.

Q: Are there any package or mounting compatibility concerns?

A: Both components are surface mount inductors with nonstandard package dimensions. Physical dimensions differ slightly (10.00mm x 10.00mm x 5.00mm for substitute vs. 10.50mm x 9.50mm x 5.50mm for original). Verify PCB layout compatibility before implementation.

Q: Does the substitute part meet the same environmental specifications?

A: Both parts are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity ratings. Operating temperature range is specified for the original part (-40°C ~ 125°C) but not provided for the substitute. Confirm operating temperature requirements with the substitute manufacturer if this parameter is critical to your application.

Q: What is the inductance frequency test specification for each part?

A: The original SCR105B-330 is tested at 2.52 kHz, while the substitute 1274AS-H-330M=P3 is tested at 100 kHz. Both maintain the specified 33 µH inductance value within their respective test conditions.