Murata Power Solutions 49151SC Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 49151SC is a 150 µH shielded wirewound inductor rated for 1.3 A continuous current with a maximum DC resistance of 250mOhm. This component is designed for surface mount applications in the 4900S series and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent inductance values, current ratings, and shielding characteristics align within acceptable electrical and mechanical tolerances for the intended application.

Substiute Parts

49151SC

Murata Power SolutionsIn Stock: 91449151SC Datasheet

Current PartRFQ

SRR1280-151K

Bourns Inc.In Stock: 67087SRR1280-151K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 49151SC is determined by the following critical parameters:

• Inductance value of 150 µH (tolerance range ±20% acceptable)
• Shielded construction to maintain electromagnetic isolation
• Current rating sufficient for 1.3 A minimum continuous operation
• Surface mount configuration with compatible footprint dimensions
• Operating temperature range that encompasses or exceeds -40°C ~ 85°C
• RoHS3 compliance and REACH unaffected status

The Bourns Inc. SRR1280-151K meets these substitution criteria with a matching 150 µH inductance, shielded drum core construction, higher current rating of 1.85 A, and compatible surface mount package dimensions within 0.492" x 0.492" x 0.315" maximum height.

Parameter Comparison

Engineering Selection Recommendations

Both the 49151SC and SRR1280-151K maintain active product status with full RoHS3 compliance and REACH unaffected designation. The SRR1280-151K provides a higher current rating of 1.85 A compared to the 49151SC at 1.3 A, offering additional design margin in applications requiring sustained current delivery. The SRR1280-151K features an extended operating temperature range to 125°C versus 85°C maximum for the 49151SC. DC resistance specifications differ by 20mOhm (270mOhm versus 250mOhm maximum), which may be relevant in low-loss applications. Both components maintain identical seated height of 0.315" with footprint dimensions within 0.012" variance, supporting direct substitution in surface mount layouts.

Frequently Asked Questions (FAQ)

Q: Can the SRR1280-151K directly replace the 49151SC in existing designs?

A: Direct substitution is supported when the application tolerates the 20mOhm increase in DC resistance and the slightly larger footprint dimensions (0.492" x 0.492" versus 0.480" x 0.480"). Seated height remains identical at 0.315".

Q: What is the significance of the inductance tolerance difference between ±20% and ±10%?

A: The SRR1280-151K provides tighter inductance tolerance at ±10% compared to the 49151SC at ±20%. This may be advantageous in applications with strict inductance specifications but does not prevent substitution in designs accepting the broader ±20% tolerance.

Q: Are both parts suitable for the same operating temperature range?

A: The 49151SC operates from -40°C to 85°C, while the SRR1280-151K extends to 125°C. The SRR1280-151K is suitable for applications requiring the 49151SC temperature range and additionally supports higher temperature environments.

Q: What are the shielding characteristics of both inductors?

A: Both the 49151SC and SRR1280-151K are shielded components. The 49151SC uses wirewound construction, while the SRR1280-151K employs drum core wirewound construction with ferrite core material, both maintaining electromagnetic isolation.

Q: How do the current ratings affect substitution decisions?

A: The 49151SC is rated for 1.3 A continuous current, while the SRR1280-151K is rated for 1.85 A. Applications designed for 1.3 A operation are compatible with the SRR1280-151K, which provides additional current capacity margin.