Murata Power Solutions 49680C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 49680C is a 68 µH shielded wirewound inductor rated for 1.71 A with a maximum DC resistance of 233mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is classified as Active product status. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and supply chain continuity for applications requiring compatible inductance values and current ratings.

Substiute Parts

49680C

Murata Power Solutions Inc.In Stock: 74249680C Datasheet

Current PartRFQ

SRF1280-680M

Bourns Inc.In Stock: 1659SRF1280-680M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 49680C is determined by the following critical parameters:

• Inductance Value: 68 µH (primary electrical requirement)
• Current Rating: Minimum 1.71 A to maintain circuit performance
• DC Resistance: Maximum 233mOhm to ensure acceptable power loss
• Shielding: Shielded configuration for electromagnetic interference control
• Mounting Type: Surface mount compatibility
• Operating Temperature Range: Support for -40°C minimum operation
• Package Footprint: Physical dimensions compatible with 12.00mm x 12.00mm board space

The Bourns SRF1280-680M qualifies as a substitute when configured in parallel connection mode, delivering the required 68 µH inductance with superior current rating and lower DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the Murata 49680C and Bourns SRF1280-680M (parallel configuration) meet Active product status requirements and maintain ROHS3 compliance. The SRF1280-680M provides enhanced performance margins with 43% higher current rating (2.44 A vs 1.71 A) and 47% lower DC resistance (123mOhm vs 233mOhm). Board layout considerations must account for the 0.50mm increase in footprint dimensions (12.50mm vs 12.00mm). Both components support the full -40°C to 85°C operating temperature range and maintain shielded construction for EMI mitigation.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SRF1280-680M directly replace the Murata 49680C without circuit modification?

A: The SRF1280-680M in parallel configuration provides identical 68 µH inductance and superior electrical performance. Physical footprint increases by 0.50mm in length and width; verify PCB layout clearance before substitution.

Q: What is the significance of the SRF1280-680M being a 2-coil inductor array?

A: The SRF1280-680M contains two coils that can be connected in parallel (68 µH, 2.44 A) or series (272 µH, 1.22 A). For 49680C substitution, the parallel configuration is required to match the 68 µH inductance specification.

Q: Does the lower DC resistance of the SRF1280-680M affect circuit behavior?

A: Lower DC resistance (123mOhm vs 233mOhm) reduces resistive losses and heat generation. This represents an improvement in efficiency and thermal performance with no negative circuit impact.

Q: Are both parts qualified for the same temperature range?

A: Both components operate at -40°C minimum. The Murata 49680C operates to 85°C maximum, while the Bourns SRF1280-680M extends to 125°C maximum, providing additional thermal margin.

Q: What packaging differences exist between these parts?

A: The Murata 49680C is supplied in Tape & Reel (TR) packaging. The Bourns SRF1280-680M is supplied in Cut Tape (CT) & Digi-Reel® packaging. Both are surface mount compatible with identical 8.00mm maximum height.