SC414MF-150 Equivalent & Substitute Parts

Part Overview

The SC414MF-150 is a 15 µH shielded inductor manufactured by Signal Transformer, rated for 740 mA continuous current with a maximum DC resistance of 425 mOhm. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and is packaged in a nonstandard surface mount configuration measuring 4.30mm × 4.30mm × 1.50mm (max height).

Substiute Parts

SC414MF-150

Signal TransformerIn Stock: 859SC414MF-150 Datasheet

Current PartRFQ

LTF3020T-150M-D

TDK CorporationIn Stock: 1835LTF3020T-150M-D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LTF3020T-150M-D from TDK Corporation qualifies as a direct substitute based on the following critical parameters:

Matching Electrical Specifications:

• Identical inductance value: 15 µH at ±20% tolerance
• Equivalent shielding: Both parts feature shielded construction
• Compatible current handling: LTF3020T-150M-D rated at 680 mA, which operates within the SC414MF-150 circuit requirements
• Lower DC resistance: 380 mOhm maximum (superior to 425 mOhm specification)

Matching Mechanical & Environmental Specifications:

• Surface mount packaging for direct PCB integration
• Extended operating temperature range: -40°C to 150°C (covers SC414MF-150 range)
• Moisture sensitivity level 1 (Unlimited) for equivalent handling
• Nonstandard package configuration with comparable footprint dimensions

Compliance & Status:

• Both parts maintain ROHS3 compliance and REACH unaffected status
• LTF3020T-150M-D is active product status with AEC-Q200 automotive qualification

Parameter Comparison

Engineering Selection Recommendations

The LTF3020T-150M-D is the qualified substitute for SC414MF-150 applications. Selection is supported by:

Electrical Compatibility: The substitute maintains identical inductance and tolerance specifications. The 680 mA current rating of the LTF3020T-150M-D is suitable for circuits designed around the 740 mA SC414MF-150 rating, provided the actual operating current does not exceed 680 mA. The lower DC resistance (380 mOhm vs. 425 mOhm) provides improved efficiency characteristics.

Environmental & Compliance Advantages: The LTF3020T-150M-D extends the upper operating temperature to 150°C, providing additional thermal margin beyond the SC414MF-150 specification of 125°C. Both parts maintain identical moisture sensitivity and RoHS3 compliance status. The TDK part carries AEC-Q200 automotive qualification, indicating enhanced reliability screening.

Product Lifecycle: The transition from obsolete SC414MF-150 to active LTF3020T-150M-D status ensures long-term availability and supply chain stability.

Physical Considerations: The LTF3020T-150M-D footprint (4.50mm × 3.00mm) differs slightly from the SC414MF-150 (4.30mm × 4.30mm), and height increases from 1.50mm to 2.00mm maximum. PCB layout verification is required to confirm mechanical fit within the available board space.

Frequently Asked Questions (FAQ)

Q: Can the LTF3020T-150M-D directly replace the SC414MF-150 in all applications?

A: The LTF3020T-150M-D is electrically compatible when circuit operating current remains at or below 680 mA. The slightly larger footprint and increased height require PCB layout verification. Both parts share identical inductance, tolerance, and shielding specifications.

Q: What is the impact of the lower saturation current (490 mA vs. 720 mA) in the substitute?

A: The saturation current specification indicates the current level at which inductance begins to degrade. The LTF3020T-150M-D saturates at 490 mA, which is lower than the SC414MF-150. Applications must ensure actual operating current remains below this threshold to maintain inductance stability.

Q: Are there packaging or mounting differences between these parts?

A: Both parts are surface mount inductors in nonstandard packages. The LTF3020T-150M-D measures 4.50mm × 3.00mm × 2.00mm (max height), compared to the SC414MF-150 at 4.30mm × 4.30mm × 1.50mm (max height). PCB footprint and clearance verification is necessary before implementation.

Q: Does the extended temperature range of the LTF3020T-150M-D provide any advantage?

A: The LTF3020T-150M-D operates to 150°C, extending 25°C beyond the SC414MF-150 specification of 125°C. This provides additional thermal margin in applications approaching the upper temperature limit.

Q: What compliance certifications apply to the substitute part?

A: The LTF3020T-150M-D maintains ROHS3 compliance and REACH unaffected status, matching the SC414MF-150. Additionally, the TDK part carries AEC-Q200 automotive qualification, indicating enhanced reliability and screening protocols.

Q: How does the DC resistance difference affect circuit performance?

A: The LTF3020T-150M-D exhibits lower DC resistance (380 mOhm max vs. 425 mOhm max), resulting in reduced resistive losses and improved power efficiency. This represents a performance improvement over the original part specification.