SC414MF-3R3 Equivalent & Substitute Parts

Part Overview

The SC414MF-3R3 is a 3.3 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 1.55 A continuous current with a maximum DC resistance of 137mOhm. 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 is ROHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

SC414MF-3R3

Signal TransformerIn Stock: 1038SC414MF-3R3 Datasheet

Current PartRFQ

1231AS-H-3R3M=P3

Murata ElectronicsIn Stock: 53381231AS-H-3R3M=P3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 1231AS-H-3R3M=P3 manufactured by Murata Electronics qualifies as a direct equivalent based on the following critical parameters:

Inductance value matches at 3.3 µH with identical ±20% tolerance. Both parts are shielded surface mount inductors tested at 100 kHz. The substitute part exceeds the current rating requirement with 2.25 A continuous current versus the original 1.55 A specification. DC resistance of the substitute at 60 mOhm maximum is superior to the original 137 mOhm specification, resulting in lower power dissipation. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The substitute part is classified as active product status, ensuring ongoing availability and supply chain continuity.

Physical dimensions differ slightly between the two parts. The substitute measures 0.146" L × 0.154" W × 0.071" H (3.70mm × 3.90mm × 1.80mm) compared to the original 0.169" L × 0.169" W × 0.059" H (4.30mm × 4.30mm × 1.50mm). Operating temperature range of the substitute extends to -40°C to 85°C, which is narrower than the original -40°C to 125°C range.

Parameter Comparison

Engineering Selection Recommendations

The 1231AS-H-3R3M=P3 is suitable for applications where the SC414MF-3R3 is no longer available. The substitute part maintains electrical equivalence for the core inductance specification and shielding requirement. Superior current rating and reduced DC resistance provide performance margin in the substitute design.

Applications operating at temperatures above 85°C require evaluation against the substitute part's maximum operating temperature limit of 85°C. The original part specification extends to 125°C. Physical dimension differences necessitate PCB layout verification to confirm mechanical fit within the available board space. The substitute part is packaged in Tape & Reel format, supporting automated assembly processes.

Both parts carry ROHS3 compliance and REACH unaffected status, maintaining regulatory alignment for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the 1231AS-H-3R3M=P3 directly replace the SC414MF-3R3 in all applications?

A: The substitute part meets the electrical requirements for inductance value, tolerance, and shielding. Applications must be evaluated for operating temperature range compatibility. The original part supports -40°C to 125°C operation, while the substitute supports -40°C to 85°C. If your application requires operation above 85°C, the substitute is not suitable without thermal management modifications.

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

A: The SC414MF-3R3 measures 4.30mm × 4.30mm × 1.50mm (L × W × H). The 1231AS-H-3R3M=P3 measures 3.70mm × 3.90mm × 1.80mm. The substitute is slightly smaller in footprint but taller in height. PCB layout must be verified to confirm fit within the available mounting space.

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

A: The substitute part exhibits 60 mOhm maximum DC resistance compared to 137 mOhm in the original part. Lower DC resistance reduces power dissipation and heat generation in the inductor. This represents an improvement in electrical performance and does not negatively impact circuit function.

Q: Are both parts available in the same packaging format?

A: The SC414MF-3R3 packaging format is listed as nonstandard. The 1231AS-H-3R3M=P3 is supplied in Tape & Reel (TR) format, supporting automated pick-and-place assembly. Packaging format differences may require assembly process adjustments.

Q: What is the saturation current difference between these inductors?

A: The SC414MF-3R3 has a saturation current (Isat) of 1.4 A. The 1231AS-H-3R3M=P3 has a saturation current of 1.6 A. Both parts exceed the continuous current rating of the original part, providing adequate saturation margin for the specified application.