SC312MF-100 Equivalent & Substitute Parts

Part Overview

The SC312MF-100 is a 10 µH shielded wirewound inductor manufactured by Signal Transformer, rated for 580 mA continuous current with a maximum DC resistance of 673 mOhm. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant.

Substiute Parts

SC312MF-100

Signal TransformerIn Stock: 839SC312MF-100 Datasheet

Current PartRFQ

74404041100

Würth ElektronikIn Stock: 601174404041100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC312MF-100 is determined by the following critical parameters:

• Inductance value: 10 µH (exact match required)
• Inductance tolerance: ±20% (must be equivalent or tighter)
• Current rating: Minimum 580 mA continuous current capability
• DC resistance: Lower or equivalent values preferred to minimize power loss
• Operating temperature range: -40°C ~ 125°C (must support full range)
• Mounting type: Surface Mount (SMD)
• Package footprint: Nonstandard 3.80mm x 3.80mm (physical compatibility required)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

The Würth Elektronik 74404041100 qualifies as a manufacturer-recommended substitute based on matching inductance, tolerance, temperature range, and compliance standards, while offering improved current handling and reduced DC resistance.

Parameter Comparison

Engineering Selection Recommendations

The 74404041100 from Würth Elektronik is the manufacturer-recommended substitute for the obsolete SC312MF-100. Both components meet ROHS3 compliance and operate across the identical temperature range. The substitute provides superior electrical performance with 1.32 A current rating versus 580 mA, and significantly lower DC resistance at 168 mOhm compared to 673 mOhm maximum. The Würth Elektronik part carries AEC-Q200 automotive qualification, providing additional reliability assurance. Physical dimensions differ slightly (4.00mm vs 3.80mm), requiring PCB layout verification. The semi-shielded construction of the substitute differs from the fully shielded original, which may affect EMI performance in sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the 74404041100 be used as a direct replacement for SC312MF-100?

A: The 74404041100 is electrically compatible based on matching inductance value, tolerance, and operating temperature range. Physical footprint differs slightly (4.00mm vs 3.80mm), requiring PCB layout confirmation before implementation.

Q: What is the primary advantage of the Würth Elektronik substitute?

A: The 74404041100 offers 2.3× higher current rating (1.32 A vs 580 mA) and 75% lower DC resistance (168 mOhm vs 673 mOhm), reducing power dissipation and thermal stress in the circuit.

Q: Does the shielding difference affect substitution?

A: The original SC312MF-100 is fully shielded while the 74404041100 is semi-shielded. Applications requiring maximum EMI suppression should evaluate the shielding difference against circuit requirements.

Q: Are both parts RoHS compliant?

A: Yes, both SC312MF-100 and 74404041100 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating