B1135AS-6R8N=P3 Equivalent & Substitute Parts

Part Overview

The B1135AS-6R8N=P3 is a 6.8 µH shielded drum core wirewound inductor manufactured by Murata Electronics, rated for 4 A continuous current with a maximum DC resistance of 29 mOhm. This component is designed for surface mount applications in compact form factors. The part is currently obsolete, making identification of suitable substitute components essential for ongoing production, maintenance, and design updates.

Substiute Parts

B1135AS-6R8N=P3

Murata ElectronicsIn Stock: 810B1135AS-6R8N=P3 Datasheet

Current PartRFQ

SRU1048-6R8Y

Bourns Inc.In Stock: 17586SRU1048-6R8Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B1135AS-6R8N=P3 is determined by the following critical parameters:

• Inductance Value: Must be 6.8 µH (±30% tolerance)
• Current Rating: Minimum 4 A continuous current capability
• DC Resistance: Lower or equal to 29 mOhm to maintain circuit performance
• Core Type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration required
• Mounting: Surface mount technology
• Temperature Range: Operating range must encompass -40°C to 85°C minimum

The SRU1048-6R8Y from Bourns Inc. meets all substitution criteria with improved electrical characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The SRU1048-6R8Y is a direct functional substitute for the B1135AS-6R8N=P3. Selection should be based on the following factors:

Product Status: The B1135AS-6R8N=P3 is obsolete. The SRU1048-6R8Y is active and maintains long-term availability.

Electrical Performance: The SRU1048-6R8Y provides superior electrical characteristics with 20% higher current rating (4.8 A vs. 4 A), 53% lower DC resistance (13.6 mOhm vs. 29 mOhm), and higher saturation current (4.1 A vs. 3.1 A). These improvements reduce power dissipation and thermal stress in the circuit.

Compliance: The SRU1048-6R8Y is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The original part compliance status is not specified.

Temperature Range: The SRU1048-6R8Y extends the operating temperature range to -40°C to 125°C, providing additional thermal margin beyond the original -40°C to 85°C specification.

Physical Dimensions: The substitute is slightly larger (10.00 × 10.00 × 5.10 mm vs. 8.40 × 8.30 × 5.00 mm). PCB layout verification is required to confirm fit within available space constraints.

Packaging: The SRU1048-6R8Y is supplied in Tape & Reel format, standard for production environments.

Frequently Asked Questions (FAQ)

Q: Can the SRU1048-6R8Y be used as a direct replacement for the B1135AS-6R8N=P3?

A: Yes. Both components share identical inductance (6.8 µH), tolerance (±30%), core material (ferrite), shielding configuration, and mounting type (surface mount). The substitute meets or exceeds all electrical specifications of the original part.

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

A: The SRU1048-6R8Y provides improved performance with higher current rating (4.8 A vs. 4 A), significantly lower DC resistance (13.6 mOhm vs. 29 mOhm), and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Physical dimensions are slightly larger.

Q: Will the larger size of the SRU1048-6R8Y affect PCB layout?

A: The substitute is 1.60 mm longer and 1.70 mm wider than the original. PCB footprint and component placement must be verified to ensure the larger package fits within available space and does not create routing conflicts.

Q: Are there any compliance or certification differences?

A: The SRU1048-6R8Y is ROHS3 compliant and REACH unaffected. The original part's compliance status is not documented. Both components have MSL rating of 1 (Unlimited).

Q: What is the impact of lower DC resistance on circuit performance?

A: Lower DC resistance (13.6 mOhm vs. 29 mOhm) reduces resistive losses and heat generation during operation. This improves efficiency and reduces thermal stress on the component and surrounding circuitry.

Q: Is the SRU1048-6R8Y available in the same packaging format?

A: The SRU1048-6R8Y is supplied in Tape & Reel (TR) format, standard for automated assembly. The original part packaging format is not specified.