Murata Power Solutions 48101SC Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 48101SC is a 100 µH shielded wirewound inductor rated for 1.6 A with a maximum DC resistance of 200mOhm. This surface mount component operates across -40°C to 85°C and is classified as Active product status with ROHS3 compliance. Substitute parts become necessary when addressing design requirements for extended temperature ranges, improved DC resistance characteristics, or when the original part reaches end-of-life status.

Key Parameters

Parameter	Value
Inductance	100 µH
Current Rating	1.6 A
DC Resistance (DCR)	200mOhm Max
Shielding	Shielded
Tolerance	±20%
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package Type	Nonstandard, 4 Lead
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 48101SC is determined by the following critical parameters:

Inductance Value: Must be 100 µH with ±20% tolerance
Current Rating: Minimum 1.6 A; higher ratings are acceptable
DC Resistance: Maximum 200mOhm; lower values are acceptable
Shielding: Must be shielded construction
Mounting Type: Surface mount only
Package Configuration: Nonstandard, 4 lead format
Temperature Range: Minimum -40°C to 85°C; extended ranges are acceptable
Compliance: ROHS3 compliance required

The two qualified substitutes meet these criteria with variations in core material (ferrite drum core vs. wirewound), DC resistance optimization, and extended temperature operating ranges.

Parameter Comparison

Parameter	48101SC (Murata)	SLF12565T-101M1R6-H (TDK)	SRR1260-101M (Bourns)
Inductance	100 µH	100 µH	100 µH
Tolerance	±20%	±20%	±20%
Current Rating (Amps)	1.6 A	1.6 A	1.7 A
DC Resistance (DCR)	200mOhm Max	147.6mOhm Max	180mOhm Max
Shielding	Shielded	Shielded	Shielded
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	Nonstandard, 4 Lead	Nonstandard	Nonstandard
Size / Dimension	0.480" L x 0.480" W (12.20mm x 12.20mm)	0.492" L x 0.492" W (12.50mm x 12.50mm)	0.492" L x 0.492" W (12.50mm x 12.50mm)
Height - Seated (Max)	0.236" (6.00mm)	0.270" (6.85mm)	0.256" (6.50mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Not For New Designs	Active

Engineering Selection Recommendations

SRR1260-101M (Bourns Inc.) is the primary substitute for new designs. This part maintains Active product status, offers improved DC resistance (180mOhm vs. 200mOhm), supports extended temperature operation to 125°C, and provides 1.7 A current rating. All compliance requirements match the original specification.

SLF12565T-101M1R6-H (TDK Corporation) is a secondary option suitable for applications requiring extended temperature range to 125°C. However, this part carries Not For New Designs status, limiting its application to legacy system support or replacement scenarios. DC resistance is optimized at 147.6mOhm, and AEC-Q200 automotive qualification is provided.

Both substitutes require PCB layout verification due to dimensional variations: the original 48101SC measures 12.20mm x 12.20mm with 6.00mm height, while both substitutes measure 12.50mm x 12.50mm with increased heights (6.85mm for TDK, 6.50mm for Bourns).

Frequently Asked Questions (FAQ)

Q: Can the SRR1260-101M replace the 48101SC in existing designs? A: Yes. The SRR1260-101M meets all critical electrical parameters: 100 µH inductance, 1.6 A minimum current rating (1.7 A actual), shielded construction, and ROHS3 compliance. PCB layout must accommodate the slightly larger footprint (12.50mm vs. 12.20mm) and increased height (6.50mm vs. 6.00mm).

Q: What is the significance of the DC resistance difference? A: Lower DC resistance reduces power dissipation and heat generation. The SRR1260-101M (180mOhm) and SLF12565T-101M1R6-H (147.6mOhm) both improve upon the original 200mOhm specification, resulting in improved thermal performance in current-carrying applications.

Q: Why is the TDK part marked "Not For New Designs"? A: This designation indicates the SLF12565T-101M1R6-H is in mature or declining production phase. While electrically qualified as a substitute, it should be reserved for legacy system maintenance or replacement applications rather than new product development.

Q: Are there package compatibility concerns? A: Yes. All three parts use nonstandard 4-lead packages with similar but not identical dimensions. The 48101SC is 12.20mm x 12.20mm x 6.00mm, while both substitutes are 12.50mm x 12.50mm with greater heights. PCB footprint and clearance verification is required before implementation.

Q: Do the substitutes support the same temperature range? A: The original 48101SC operates -40°C to 85°C. Both substitutes extend this to -40°C to 125°C, providing additional thermal margin. This is beneficial for applications in elevated ambient or high-power environments.

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