48681SC Equivalent & Substitute Parts

Part Overview

The 48681SC is a 680 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., designed for surface mount applications. This component is rated for 660 mA continuous current with a maximum DC resistance of 1.25Ohm and operates across the temperature range of -40°C to 85°C. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent inductance values, compatible current ratings, and matching shielding characteristics are required for design flexibility, inventory management, or supply chain optimization.

Substiute Parts

48681SC

Murata Power Solutions Inc.In Stock: 116548681SC Datasheet

Current PartRFQ

SRR1260-681K

Bourns Inc.In Stock: 2274SRR1260-681K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR1260-681K from Bourns Inc. qualifies as a direct substitute based on the following alignment of critical parameters:

Inductance equivalence: Both parts specify 680 µH, meeting the primary functional requirement.

Current rating compatibility: The substitute part is rated for 800 mA, which exceeds the main part's 660 mA specification, ensuring adequate current handling capacity.

DC resistance: The substitute part specifies 1.15Ohm maximum, which is lower than the main part's 1.25Ohm maximum, providing improved efficiency characteristics.

Shielding: Both parts feature shielded construction, maintaining electromagnetic isolation requirements.

Surface mount compatibility: Both parts are surface mount devices with nonstandard package configurations.

Compliance alignment: Both parts are ROHS3 compliant with MSL 1 rating and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

Both the 48681SC and SRR1260-681K are active production components with full ROHS3 compliance and REACH unaffected status. The SRR1260-681K offers enhanced specifications including higher current rating (800 mA vs. 660 mA), lower DC resistance (1.15Ohm vs. 1.25Ohm), tighter inductance tolerance (±10% vs. ±20%), and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Selection between these parts depends on application-specific requirements for current capacity, thermal operating range, and tolerance specifications. Both parts maintain shielded construction and surface mount compatibility, ensuring functional equivalence in standard circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the SRR1260-681K directly replace the 48681SC in existing designs?

A: Yes. Both parts share identical 680 µH inductance specifications, shielded construction, surface mount configuration, and equivalent Q-factor performance at comparable frequencies. The substitute part meets or exceeds all critical electrical parameters of the main part.

Q: What are the key differences between these two inductors?

A: The SRR1260-681K provides higher current rating (800 mA vs. 660 mA), lower DC resistance (1.15Ohm vs. 1.25Ohm), tighter inductance tolerance (±10% vs. ±20%), and wider operating temperature range (-40°C to 125°C vs. -40°C to 85°C). The main part uses standard wirewound construction while the substitute uses drum core wirewound construction.

Q: Are there any package or footprint considerations?

A: Both parts are nonstandard, 4-lead surface mount packages. The 48681SC measures 0.480" L x 0.480" W x 0.236" H (12.20mm x 12.20mm x 6.00mm), while the SRR1260-681K measures 0.492" L x 0.492" W x 0.256" H (12.50mm x 12.50mm x 6.50mm). Verify PCB layout compatibility before substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 48681SC and SRR1260-681K are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are suitable for applications requiring these certifications.

Q: What is the inductance tolerance difference impact?

A: The SRR1260-681K offers ±10% tolerance compared to the 48681SC's ±20% tolerance. This tighter tolerance may provide improved circuit performance in applications sensitive to inductance variation, though both parts meet the 680 µH specification.