SC414MF-1R5 Equivalent & Substitute Parts

Part Overview

The SC414MF-1R5 is a 1.5 µH shielded inductor manufactured by Signal Transformer, rated for 2.1 A continuous current with a maximum DC resistance of 106mOhm. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The part operates across the industrial temperature range of -40°C to 125°C and is mounted as a surface mount device in a nonstandard package measuring 4.30mm × 4.30mm × 1.50mm (max height).

Substiute Parts

SC414MF-1R5

Signal TransformerIn Stock: 799SC414MF-1R5 Datasheet

Current PartRFQ

1231AS-H-1R5N=P3

Murata ElectronicsIn Stock: 22431231AS-H-1R5N=P3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC414MF-1R5 is determined by the following critical parameters:

• Inductance Value: Must be 1.5 µH at 100 kHz test frequency
• Shielding: Must be shielded to maintain electromagnetic isolation
• Current Rating: Substitute must support minimum 2.1 A continuous current
• DC Resistance: Lower DCR values are acceptable; higher values may increase thermal dissipation
• Saturation Current: Must meet or exceed 2.3 A minimum saturation threshold
• Mounting Type: Surface mount configuration required
• Operating Temperature: Substitute must support the full -40°C to 125°C range or a subset thereof
• Compliance: RoHS3 and REACH compliance required for regulatory alignment

The Murata Electronics 1231AS-H-1R5N=P3 meets these substitution criteria with matching inductance, shielded construction, higher current rating (2.7 A), and superior DC resistance performance (42 mOhm vs. 106 mOhm).

Parameter Comparison

Engineering Selection Recommendations

The 1231AS-H-1R5N=P3 from Murata Electronics is a qualified substitute for the obsolete SC414MF-1R5 based on the following factors:

• Inductance Match: Both parts specify 1.5 µH at 100 kHz, ensuring equivalent circuit performance in frequency-dependent applications.
• Current Capacity: The substitute's 2.7 A rating exceeds the original 2.1 A requirement, providing design margin.
• DC Resistance Advantage: The 42 mOhm maximum DCR of the substitute is significantly lower than the original 106 mOhm, reducing resistive losses and heat generation.
• Regulatory Compliance: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental standards.
• Product Status: The substitute is active and in production with 2200 units in stock, ensuring long-term availability.

Critical Consideration: The substitute operates to a maximum of 85°C, compared to the original 125°C upper limit. Applications requiring sustained operation above 85°C require thermal analysis or alternative component selection.

Frequently Asked Questions (FAQ)

Q: Can the 1231AS-H-1R5N=P3 be used as a direct replacement for SC414MF-1R5?

A: Yes, for applications operating within -40°C to 85°C. The inductance value, shielding, and saturation characteristics are compatible. However, if your circuit operates above 85°C, thermal derating or alternative parts must be evaluated.

Q: What is the impact of the lower saturation current (2.1 A vs. 2.3 A) in the substitute?

A: The substitute's saturation current of 2.1 A is marginally lower than the original 2.3 A. For circuits operating near or above 2.1 A, verify that the substitute's saturation margin remains acceptable for your application's transient conditions.

Q: Does the smaller physical size of the substitute affect PCB layout?

A: The substitute measures 3.70mm × 3.90mm versus the original 4.30mm × 4.30mm. Both are nonstandard packages with similar footprints suitable for surface mount assembly. Verify pad spacing and clearance requirements with your PCB design tools.

Q: Why is the DC resistance of the substitute significantly lower?

A: The 1231AS-H-1R5N=P3 uses a drum core wirewound construction with ferrite material, resulting in lower resistive losses (42 mOhm vs. 106 mOhm). This reduces power dissipation and heat generation, which is advantageous for most applications.

Q: Are both parts RoHS3 compliant?

A: Yes. Both SC414MF-1R5 and 1231AS-H-1R5N=P3 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the tolerance difference between the two parts?

A: The original specifies ±20% inductance tolerance, while the substitute specifies ±30%. For circuits sensitive to inductance variation, verify that the wider tolerance of the substitute remains within acceptable design margins.