Equivalent & Substitute Parts for 24S100C

Part Overview

The Murata Power Solutions 24S100C is a 10 µH shielded wirewound inductor rated for 1.64 A with a maximum DC resistance of 70mOhm. This component is part of the 2400 series and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for surface mount applications.

Key Parameters

Parameter	Value
Inductance	10 µH
Current Rating	1.64 A
DC Resistance (DCR)	70mOhm Max
Shielding	Shielded
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Self Resonant Frequency	25.6 MHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 24S100C are qualified based on the following critical parameters:

Inductance Value: Must be 10 µH to maintain circuit functionality
Current Rating: Must meet or exceed 1.64 A to handle design current requirements
DC Resistance: Must not exceed 70mOhm to maintain power efficiency specifications
Shielding: Must be shielded to prevent electromagnetic interference
Mounting Type: Must be surface mount compatible
Operating Temperature: Must support the -40°C ~ 85°C range minimum
Compliance: Must maintain RoHS3 compliance and MSL 1 rating

The identified substitutes (PM74SB-100M-RC and SRR7045-100M) meet these core electrical and mechanical requirements while offering extended temperature ranges and improved current handling in certain configurations.

Parameter Comparison

Parameter	24S100C (Murata)	PM74SB-100M-RC (Bourns)	SRR7045-100M (Bourns)
Manufacturer	Murata Power Solutions Inc.	Bourns Inc.	Bourns Inc.
Inductance	10 µH	10 µH	10 µH
Current Rating (Amps)	1.64 A	1.65 A	2.7 A
DC Resistance (DCR)	70mOhm Max	70mOhm Max	42mOhm Max
Shielding	Shielded	Shielded	Shielded
Type	Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Self Resonant Frequency	25.6 MHz	26 MHz	25 MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	Nonstandard	Nonstandard	Nonstandard
Size / Dimension	0.303" L x 0.280" W (7.70mm x 7.10mm)	0.307" L x 0.276" W (7.80mm x 7.00mm)	0.276" L x 0.276" W (7.00mm x 7.00mm)
Height - Seated (Max)	0.177" (4.50mm)	0.193" (4.90mm)	0.189" (4.80mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

Both substitute parts maintain active product status and full RoHS3 compliance with MSL 1 rating, ensuring regulatory and environmental compatibility with the original 24S100C.

PM74SB-100M-RC provides a direct electrical equivalent with matching 1.65 A current rating and 70mOhm DCR specification. This part offers an extended operating temperature range to 125°C and maintains comparable self-resonant frequency characteristics. Physical dimensions are within 0.004" variance, making it suitable for designs with minimal PCB layout constraints.

SRR7045-100M delivers superior current handling at 2.7 A with reduced DC resistance of 42mOhm, resulting in lower power dissipation. This part is optimal for applications requiring enhanced thermal performance or higher current margins. The compact 7.00mm x 7.00mm footprint provides space savings compared to the original part. Extended temperature rating to 125°C and lower DCR make this suitable for high-efficiency power conversion circuits.

Selection between substitutes depends on thermal budget requirements and available PCB space. Both parts satisfy the minimum electrical specifications of the 24S100C while offering performance enhancements.

Frequently Asked Questions (FAQ)

Q: Can PM74SB-100M-RC be used as a direct replacement for 24S100C?

A: Yes. Both parts share identical inductance (10 µH), equivalent current ratings (1.65 A vs 1.64 A), and matching DC resistance (70mOhm Max). Physical dimensions vary by less than 0.01", and both maintain RoHS3 compliance and MSL 1 rating. The extended temperature range of PM74SB-100M-RC provides additional operational margin.

Q: What are the advantages of SRR7045-100M over the original 24S100C?

A: SRR7045-100M offers 64% higher current rating (2.7 A vs 1.64 A) and 40% lower DC resistance (42mOhm vs 70mOhm). These characteristics reduce power dissipation and thermal stress in the inductor. The compact footprint (7.00mm x 7.00mm) enables space optimization on PCBs. Extended temperature range to 125°C supports demanding thermal environments.

Q: Are there packaging differences between these parts?

A: The original 24S100C is supplied in Tape & Reel (TR) packaging. PM74SB-100M-RC is also supplied in Tape & Reel (TR). SRR7045-100M is supplied in Cut Tape (CT) & Digi-Reel® packaging. Verify packaging compatibility with assembly processes before selection.

Q: Do all three parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. All maintain active product status with equivalent regulatory standing.

Q: What is the impact of different core materials on substitution?

A: The original 24S100C uses a standard wirewound core. Both substitutes employ drum core, ferrite-based wirewound construction. This design difference does not affect electrical equivalence for the specified parameters but may influence high-frequency behavior and EMI characteristics in specific circuit topologies.

Q: Can height differences affect PCB layout?

A: The original part has a maximum seated height of 0.177" (4.50mm). PM74SB-100M-RC measures 0.193" (4.90mm) and SRR7045-100M measures 0.189" (4.80mm). Verify clearance in designs with height-constrained layouts, particularly in multi-layer assemblies or shielded enclosures.

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