SC414MF-180 Equivalent & Substitute Parts

Part Overview

The SC414MF-180 is a 18 µH shielded inductor manufactured by Signal Transformer, rated for 680 mA continuous current with a maximum DC resistance of 497mOhm. This component is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

SC414MF-180

Signal TransformerIn Stock: 1068SC414MF-180 Datasheet

Current PartRFQ

ASPI-4030S-180M-T

Abracon LLCIn Stock: 888ASPI-4030S-180M-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC414MF-180 is determined by the following critical parameters:

• Inductance Value: Must be 18 µH with ±20% tolerance
• Shielding: Must be shielded construction
• Mounting Type: Must be surface mount
• Operating Temperature Range: Must support -40°C to 125°C minimum
• Current Handling: Substitute must support minimum 680 mA continuous current rating
• DC Resistance: Lower DCR values are acceptable; higher values require circuit validation
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The ASPI-4030S-180M-T from Abracon LLC meets all substitution criteria with enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-4030S-180M-T is a direct functional substitute for the SC414MF-180. Key selection factors include:

Compliance & Availability: The ASPI-4030S-180M-T maintains active product status with confirmed inventory availability, whereas the SC414MF-180 is obsolete. Both parts are ROHS3 compliant with MSL 1 ratings, ensuring equivalent environmental and regulatory compliance.

Electrical Performance: The substitute part provides superior electrical characteristics with 1.1 A continuous current rating versus 680 mA, and significantly lower DC resistance of 200 mOhm compared to 497 mOhm maximum. These improvements reduce thermal dissipation and allow operation at higher current levels without saturation concerns.

Physical Considerations: The ASPI-4030S-180M-T has a slightly smaller footprint (4.00mm x 4.00mm) but increased height (3.00mm versus 1.50mm). PCB layout verification is required to confirm vertical clearance compatibility in the target application.

Temperature & Frequency Performance: Both parts operate identically across the -40°C to 125°C range and are tested at 100 kHz. The substitute provides specified self-resonant frequency of 10 MHz, enabling predictable high-frequency behavior.

Frequently Asked Questions (FAQ)

Q: Can the ASPI-4030S-180M-T directly replace the SC414MF-180 in existing designs?

A: Yes, provided PCB layout accommodates the increased height of 3.00mm versus 1.50mm. The electrical specifications are compatible, with the substitute offering improved current handling and lower DC resistance.

Q: What is the impact of the lower DC resistance in the ASPI-4030S-180M-T?

A: Lower DC resistance (200 mOhm versus 497 mOhm) reduces resistive losses and heat generation. This is beneficial for thermal performance and allows the inductor to handle higher current levels before saturation.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Regulatory and environmental compliance is equivalent.

Q: Why is the ASPI-4030S-180M-T taller than the SC414MF-180?

A: The ASPI-4030S-180M-T uses a drum core, wirewound construction with Nickel Zinc Ferrite material, which requires additional vertical space. The horizontal footprint is actually smaller (4.00mm versus 4.30mm).

Q: What is the significance of the 10 MHz self-resonant frequency specification?

A: The self-resonant frequency indicates the frequency at which the inductor's parasitic capacitance begins to dominate its behavior. The 10 MHz specification for the ASPI-4030S-180M-T ensures stable operation well above typical switching frequencies in most applications.

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

A: The SC414MF-180 uses nonstandard packaging, while the ASPI-4030S-180M-T is supplied in Tape & Reel (TR) format. Both are surface mount components with equivalent functional performance.