SC414MF-680 Equivalent & Substitute Parts

Part Overview

The SC414MF-680 is a 68 µH shielded inductor manufactured by Signal Transformer, rated for 350 mA continuous current with a maximum DC resistance of 1.85Ohm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

The SC414MF-680 operates across an industrial temperature range of -40°C to 125°C and is packaged in a nonstandard surface mount configuration measuring 4.30mm × 4.30mm with a seated height of 1.50mm maximum. RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1) ensure compatibility with modern manufacturing standards.

Substiute Parts

SC414MF-680

Signal TransformerIn Stock: 800SC414MF-680 Datasheet

Current PartRFQ

SP1812R-683K

API Delevan Inc.In Stock: 723SP1812R-683K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC414MF-680 is determined by the following critical parameters:

• Inductance Value: 68 µH (primary electrical specification)
• Shielding Type: Shielded (electromagnetic containment requirement)
• Current Rating: Minimum 350 mA continuous current capability
• DC Resistance: Maximum 1.85Ohm preferred; higher values acceptable with circuit validation
• Operating Temperature: Minimum -40°C to 125°C range
• Mounting Type: Surface mount configuration
• Compliance: RoHS3 and REACH compliance maintained

The SP1812R-683K from API Delevan Inc. qualifies as an equivalent substitute based on matching inductance value, shielding requirement, and compliance certifications. The substitute maintains the same 68 µH inductance specification with compatible surface mount packaging and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The SP1812R-683K serves as the primary equivalent substitute for the obsolete SC414MF-680. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards.

The substitute part is classified as active product status, providing long-term availability and supply chain stability compared to the obsolete main part. The SP1812R-683K operates across an extended lower temperature range (-55°C minimum versus -40°C), offering broader thermal performance envelope.

Design consideration: The SP1812R-683K exhibits reduced current rating (275 mA versus 350 mA) and saturation current (250 mA versus 360 mA). Circuit applications requiring the full 350 mA rating must validate performance with the lower current specification. The substitute part also presents increased DC resistance (2.7Ohm maximum versus 1.85Ohm maximum), which affects power dissipation characteristics and must be evaluated for thermal and efficiency impact.

Physical dimensions differ between parts. The substitute measures 4.50mm × 3.20mm with 3.40mm seated height, compared to the main part's 4.30mm × 4.30mm footprint with 1.50mm height. PCB layout and mechanical clearance must be verified before substitution.

Frequently Asked Questions (FAQ)

Q: Can the SP1812R-683K directly replace the SC414MF-680 in all applications?

A: The SP1812R-683K matches the 68 µH inductance value and shielding requirement. However, applications operating at or near 350 mA continuous current must be re-evaluated, as the substitute is rated for 275 mA maximum. DC resistance increase from 1.85Ohm to 2.7Ohm affects power dissipation and must be validated for thermal performance.

Q: What are the physical compatibility considerations?

A: The substitute part uses standard 1812 (4532 Metric) packaging versus the nonstandard footprint of the main part. Dimensions differ: SP1812R-683K measures 4.50mm × 3.20mm with 3.40mm height, while SC414MF-680 measures 4.30mm × 4.30mm with 1.50mm height. PCB layout modifications may be required.

Q: Does the substitute maintain compliance certifications?

A: Yes. Both the SC414MF-680 and SP1812R-683K are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). REACH compliance is maintained for both parts.

Q: What is the inductance tolerance difference impact?

A: The main part specifies ±20% tolerance, while the substitute offers tighter ±10% tolerance. This represents improved inductance accuracy in the substitute part and does not create compatibility issues.

Q: Is the extended temperature range of the substitute beneficial?

A: The SP1812R-683K operates from -55°C to 125°C compared to the main part's -40°C to 125°C range. This provides additional low-temperature performance margin for applications requiring extended thermal operation.