SC312MF-6R8 Equivalent & Substitute Parts

Part Overview

The SC312MF-6R8 is a 6.8 µH shielded wirewound inductor manufactured by Signal Transformer, rated for 700 mA continuous current with a maximum DC resistance of 430mOhm. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications. The part operates across an industrial temperature range of -40°C to 125°C and is fully RoHS3 compliant.

Substiute Parts

SC312MF-6R8

Signal TransformerIn Stock: 1070SC312MF-6R8 Datasheet

Current PartRFQ

1229AS-H-6R8M=P3

Murata ElectronicsIn Stock: 35041229AS-H-6R8M=P3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC312MF-6R8 is determined by the following critical parameters:

Inductance Value: 6.8 µH with ±20% tolerance is the primary electrical requirement. Substitute parts must maintain this exact inductance specification.

Current Rating: The original part supports 700 mA continuous current. Substitute parts must meet or exceed this current rating to ensure safe operation without thermal stress.

DC Resistance (DCR): Maximum 430 mOhm establishes the acceptable power loss profile. Lower DCR values in substitutes improve efficiency and reduce heat generation.

Shielding: Shielded construction is mandatory to prevent electromagnetic interference in the target application.

Surface Mount Configuration: The part requires surface mount packaging compatible with automated assembly processes.

Environmental Compliance: RoHS3 compliance and operating temperature range compatibility ensure regulatory and operational suitability.

The substitute part 1229AS-H-6R8M=P3 meets all critical substitution criteria while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 1229AS-H-6R8M=P3 from Murata Electronics is a direct functional substitute for the obsolete SC312MF-6R8. The substitute part maintains identical inductance and tolerance specifications while providing superior electrical performance through reduced DC resistance (192 mOhm versus 430 mOhm), resulting in lower power dissipation and improved efficiency.

The substitute supports higher continuous current (1.2 A versus 700 mA), providing additional design margin for the target application. Both parts are RoHS3 compliant and suitable for industrial environments. The substitute is currently in active production status with established supply chain availability, eliminating obsolescence risk.

The operating temperature range of the substitute (-40°C to 85°C) is narrower than the original part (-40°C to 125°C). Applications requiring operation above 85°C must evaluate this limitation against specific thermal requirements.

Physical dimensions are comparable, with the substitute offering a slightly lower profile (1.20mm versus 1.35mm maximum height), which may provide layout advantages in space-constrained designs. The substitute is supplied in standard Tape & Reel packaging, supporting high-volume automated assembly.

Frequently Asked Questions (FAQ)

Q: Can the 1229AS-H-6R8M=P3 directly replace the SC312MF-6R8 in existing designs?

A: Yes, the substitute maintains the same 6.8 µH inductance value and ±20% tolerance. Both parts are shielded surface mount components with compatible footprints. Physical dimensions are within acceptable tolerance for standard PCB layouts. Verify that your application does not require operation above 85°C, as the substitute's maximum operating temperature is lower than the original part.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The substitute's DC resistance of 192 mOhm (versus 430 mOhm in the original) reduces resistive losses by approximately 55%. This results in lower heat generation and improved power efficiency, particularly beneficial in applications with sustained current draw near the 700 mA rating.

Q: Are there any mechanical compatibility concerns?

A: The substitute dimensions (3.70mm x 3.90mm x 1.20mm) are comparable to the original (3.80mm x 3.80mm x 1.35mm). The slightly lower profile may require PCB layout verification, but standard surface mount assembly processes accommodate both parts without modification.

Q: What is the difference between wirewound and drum core construction?

A: Both the original (wirewound) and substitute (drum core wirewound) are wirewound inductors. The drum core construction in the substitute provides improved shielding effectiveness and thermal characteristics while maintaining the same electrical specifications.

Q: Is the substitute available in production quantities?

A: Yes, the 1229AS-H-6R8M=P3 is in active production status with established supply chain availability through standard distribution channels, supplied in Tape & Reel packaging for automated assembly.