SC414MF-4R7 Equivalent & Substitute Parts

Part Overview

The SC414MF-4R7 is a 4.7 µH shielded inductor manufactured by Signal Transformer, rated for 1.4 A continuous current with a maximum DC resistance of 154mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is classified as obsolete. Due to its obsolete status and limited current inventory, identifying qualified substitute components is essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±20%
Current Rating	1.4 A
Saturation Current (Isat)	1.2 A
DC Resistance (DCR)	154mOhm Max
Shielding	Shielded
Operating Temperature Range	-40°C to 125°C
Mounting Type	Surface Mount
Package Type	Nonstandard
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SC414MF-4R7 is determined by the following critical parameters:

Inductance Value: Must be 4.7 µH with ±20% tolerance
Shielding: Must be shielded construction
Mounting Type: Must be surface mount
Current Rating: Must meet or exceed 1.4 A continuous current requirement
DC Resistance: Lower or equal DCR values are acceptable
Operating Temperature: Must support the required operating range or a subset thereof
RoHS & Compliance: Must maintain ROHS3 compliance and REACH unaffected status

The Murata Electronics 1231AS-H-4R7M=P3 meets all substitution criteria with improved electrical performance characteristics.

Parameter Comparison

Parameter	SC414MF-4R7 (Main Part)	1231AS-H-4R7M=P3 (Substitute)	Compatibility
Manufacturer	Signal Transformer	Murata Electronics	Different manufacturer
Inductance	4.7 µH	4.7 µH	Matched
Inductance Tolerance	±20%	±20%	Matched
Current Rating (Amps)	1.4 A	2 A	Substitute exceeds requirement
Saturation Current (Isat)	1.2 A	1.35 A	Substitute exceeds requirement
DC Resistance (DCR)	154mOhm Max	72mOhm Max	Substitute provides lower resistance
Shielding	Shielded	Shielded	Matched
Operating Temperature Range	-40°C to 125°C	-40°C to 85°C	Substitute range is subset
Mounting Type	Surface Mount	Surface Mount	Matched
Package Type	Nonstandard	Nonstandard	Matched
Size / Dimension	0.169" L x 0.169" W (4.30mm x 4.30mm)	0.146" L x 0.154" W (3.70mm x 3.90mm)	Substitute is slightly smaller
Height - Seated (Max)	0.059" (1.50mm)	0.071" (1.80mm)	Substitute is slightly taller
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Matched
REACH Status	REACH Unaffected	REACH Unaffected	Matched
Product Status	Obsolete	Active	Substitute is actively manufactured

Engineering Selection Recommendations

The 1231AS-H-4R7M=P3 from Murata Electronics is a qualified substitute for the obsolete SC414MF-4R7. Selection is supported by the following factors:

Electrical Equivalence: Identical inductance value and tolerance with superior current handling and lower DC resistance
Compliance Alignment: Both components maintain ROHS3 compliance and REACH unaffected status
Active Production: The substitute is actively manufactured, ensuring long-term availability and supply chain stability
Physical Compatibility: Nonstandard package types are matched; minor dimensional variations (3.70mm x 3.90mm vs. 4.30mm x 4.30mm footprint and 1.80mm vs. 1.50mm height) require PCB layout verification
Temperature Consideration: The substitute operates to 85°C maximum, which is acceptable for applications not requiring the full 125°C upper limit of the original part

Applications requiring sustained operation above 85°C must evaluate alternative solutions or confirm that the substitute's temperature range is sufficient for the intended use case.

Frequently Asked Questions (FAQ)

Q: Can the 1231AS-H-4R7M=P3 directly replace the SC414MF-4R7 without PCB modifications?

A: The substitute has matched inductance, tolerance, and shielding characteristics. However, physical dimensions differ slightly: the substitute footprint is 3.70mm x 3.90mm (versus 4.30mm x 4.30mm) and seated height is 1.80mm (versus 1.50mm). PCB layout verification is required to confirm pad spacing and clearance compatibility.

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

A: The 1231AS-H-4R7M=P3 provides 72mOhm maximum DCR compared to 154mOhm in the original part. Lower resistance reduces power dissipation and heat generation, which is a performance improvement for the application.

Q: Is the substitute suitable for applications requiring operation above 85°C?

A: The 1231AS-H-4R7M=P3 is rated to 85°C maximum, while the original SC414MF-4R7 operates to 125°C. Applications requiring sustained operation above 85°C must confirm that the substitute's temperature range meets system requirements or identify alternative components.

Q: Are there packaging differences between the main part and substitute?

A: Both components use nonstandard surface mount packages. The substitute is supplied in Tape & Reel (TR) packaging, which is standard for production environments. Verify packaging format compatibility with your procurement and assembly processes.

Q: What compliance certifications apply to the substitute part?

A: The 1231AS-H-4R7M=P3 maintains ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited moisture sensitivity level), matching the regulatory profile of the original component.

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