SC414MF-470 Equivalent & Substitute Parts

Part Overview

The SC414MF-470 is a 47 µH shielded inductor manufactured by Signal Transformer, rated for 400 mA continuous current with a maximum DC resistance of 1.32 Ohm. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part operates across an industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SC414MF-470

Signal TransformerIn Stock: 994SC414MF-470 Datasheet

Current PartRFQ

VLCF4020T-470MR39

TDK CorporationIn Stock: 3178VLCF4020T-470MR39 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The VLCF4020T-470MR39 from TDK Corporation qualifies as a direct substitute based on the following critical parameters:

Matching Parameters:

• Inductance value: 47 µH at ±20% tolerance
• Inductance test frequency: 100 kHz
• Shielding classification: Shielded
• Mounting type: Surface Mount
• RoHS3 compliance
• Moisture Sensitivity Level: 1 (Unlimited)
• Operating temperature range overlap: -40°C ~ 105°C (covers the lower operating range of the original part)

Allowable Variations:

• Current rating: 390 mA (substitute) vs. 400 mA (original) — within acceptable margin for most applications
• DC resistance: 934 mOhm (substitute) vs. 1.32 Ohm (original) — lower resistance is acceptable
• Physical dimensions: 4.00mm x 4.00mm (substitute) vs. 4.30mm x 4.30mm (original) — minor footprint difference
• Height: 2.00mm (substitute) vs. 1.50mm (original) — requires PCB layout verification

Parameter Comparison

Engineering Selection Recommendations

The VLCF4020T-470MR39 is suitable as a substitute for the obsolete SC414MF-470 based on the following factors:

Compliance & Availability: The substitute part carries Active product status with established supply chain availability (3089 pcs in stock), whereas the original part is obsolete. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

Electrical Compatibility: The inductance value and tolerance remain identical at 47 µH ±20%. The saturation current of 390 mA is marginally lower than the original 410 mA specification, requiring verification that circuit current demands do not exceed 390 mA continuous operation. The lower DC resistance of the substitute (934 mOhm vs. 1.32 Ohm) reduces power dissipation and improves efficiency.

Thermal Considerations: The substitute operates to 105°C maximum, which is 20°C lower than the original part's 125°C rating. Applications requiring sustained operation above 105°C require alternative solutions.

Physical Integration: The substitute footprint is slightly smaller (4.00mm vs. 4.30mm) but taller (2.00mm vs. 1.50mm). PCB layout must accommodate the increased height to prevent component interference or clearance violations.

Frequently Asked Questions (FAQ)

Q: Can the VLCF4020T-470MR39 directly replace the SC414MF-470 without circuit modifications?

A: Direct replacement is possible for applications operating below 390 mA continuous current and below 105°C ambient temperature. The lower DC resistance of the substitute improves performance. PCB layout must accommodate the increased component height (2.00mm vs. 1.50mm).

Q: What is the impact of the 10 mA lower saturation current rating?

A: The substitute's 390 mA saturation current is 20 mA lower than the original. Circuits designed for 400 mA operation must be evaluated to confirm operation remains within the 390 mA limit. If the circuit requires the full 400 mA capability, alternative substitutes must be sourced.

Q: Are there thermal limitations with the substitute part?

A: The substitute operates to a maximum of 105°C, compared to the original's 125°C. Applications requiring sustained operation in environments exceeding 105°C require alternative component selection or thermal management modifications.

Q: How do the DC resistance values affect circuit performance?

A: The substitute's lower DC resistance (934 mOhm vs. 1.32 Ohm) reduces resistive losses and heat generation. This generally improves circuit efficiency and is not a limiting factor for substitution.

Q: Is the physical size difference critical for PCB layout?

A: The substitute is smaller in footprint (4.00mm vs. 4.30mm) but taller (2.00mm vs. 1.50mm). Verify that the increased height does not conflict with adjacent components, shielding cans, or PCB clearance requirements before implementation.

Q: Do both parts meet the same regulatory and compliance standards?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. Regulatory continuity is maintained with the substitute.