Murata Power Solutions 49102SC Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 49102SC is a 1 mH shielded wirewound inductor rated for 500 mA with a maximum DC resistance of 1.5 Ohm. This surface mount component operates across the temperature range of -40°C to 85°C and is classified as Active product status. Finding equivalent and substitute parts becomes necessary when managing supply chain continuity, optimizing inventory levels, or addressing specific application requirements within the allowable electrical and mechanical parameter ranges.

Substiute Parts

49102SC

Murata Power Solutions Inc.In Stock: 118349102SC Datasheet

Current PartRFQ

SRR1280-102K

Bourns Inc.In Stock: 12356SRR1280-102K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 49102SC is determined by the following core parameters:

• Inductance value must be 1 mH
• Shielding configuration must be shielded
• Mounting type must be surface mount
• Current rating must meet or exceed 500 mA
• DC resistance must not exceed 1.5 Ohm
• Operating temperature range must encompass the application requirements
• RoHS3 compliance must be maintained
• Package configuration must be compatible with board layout constraints

The Bourns Inc. SRR1280-102K meets these substitution criteria with a 1 mH inductance, shielded configuration, 680 mA current rating (exceeding the 500 mA requirement), and 1.7 Ohm maximum DC resistance. Both parts maintain ROHS3 compliance and surface mount configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the 49102SC and SRR1280-102K are Active product status components with full ROHS3 compliance and REACH unaffected status. The SRR1280-102K provides enhanced current handling capability at 680 mA compared to the 500 mA rating of the 49102SC, with an extended operating temperature range to 125°C. The tighter tolerance specification of ±10% on the Bourns part offers improved inductance accuracy. DC resistance differential of 0.2 Ohm maximum between the two parts remains within acceptable engineering margins for most applications. Both components maintain identical moisture sensitivity classification and surface mount configuration.

Frequently Asked Questions (FAQ)

Q: Can the SRR1280-102K directly replace the 49102SC in existing designs?

A: The SRR1280-102K meets the core electrical specifications of the 49102SC with equivalent 1 mH inductance and shielded configuration. Physical dimensions differ slightly (12.50mm vs 12.20mm), requiring board layout verification. Both maintain identical height at 0.315 inches maximum.

Q: What is the significance of the current rating difference between these parts?

A: The 49102SC is rated for 500 mA while the SRR1280-102K is rated for 680 mA. The higher rating on the Bourns part provides additional design margin and thermal headroom in current-limited applications.

Q: How do the tolerance specifications affect circuit performance?

A: The 49102SC carries ±20% tolerance while the SRR1280-102K carries ±10% tolerance. Tighter tolerance on the Bourns part reduces inductance variation across production batches, beneficial for applications requiring precise frequency response or impedance matching.

Q: Are there package compatibility considerations?

A: Both parts are nonstandard 4-lead surface mount packages with identical maximum seated height of 0.315 inches. Footprint dimensions differ marginally (12.20mm vs 12.50mm), requiring PCB layout confirmation before substitution.

Q: Do both parts meet current regulatory requirements?

A: Both the 49102SC and SRR1280-102K are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level), meeting current regulatory standards for electronic component manufacturing and deployment.