Equivalent & Substitute Parts for Murata 34L154C

Part Overview

The Murata 34L154C is a 150 µH shielded wirewound inductor rated for 180 mA continuous current with a maximum DC resistance of 6.1Ohm. This component is part of the 3400L series and is classified as obsolete. Due to its obsolete status, identifying suitable substitute components is essential for ongoing design support, production continuity, and system maintenance. The substitute part must maintain equivalent inductance, current handling capability, and shielding characteristics while meeting modern compliance standards.

Substiute Parts

34L154C

Murata Power Solutions Inc.In Stock: 124234L154C Datasheet

Current PartRFQ

SRR4011-151YL

Bourns Inc.In Stock: 854SRR4011-151YL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Murata 34L154C is determined by the following critical parameters:

• Inductance Value: Must be 150 µH to maintain circuit functionality
• Current Rating: Substitute must support minimum 180 mA; higher ratings provide design margin
• DC Resistance: Lower DCR values reduce power dissipation and heat generation
• Shielding: Shielded construction required to prevent electromagnetic interference
• Mounting Type: Surface mount configuration mandatory for PCB compatibility
• Operating Temperature: Must support -40°C ~ 125°C range
• Physical Dimensions: Footprint compatibility within 5.20mm x 5.20mm x 1.20mm envelope

The Bourns SRR4011-151YL meets these substitution criteria with improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The Bourns SRR4011-151YL is a qualified substitute for the obsolete Murata 34L154C based on the following factors:

• Functional Equivalence: Both components provide 150 µH inductance with shielded construction and surface mount configuration
• Improved Performance: The SRR4011-151YL offers 250 mA current rating versus 180 mA, providing 39% additional current capacity. DC resistance is reduced to 3.8Ohm maximum, lowering power dissipation by 38%
• Compliance Status: The SRR4011-151YL maintains ROHS3 compliance and MSL 1 rating, meeting modern regulatory requirements
• Active Product Status: The substitute is an active product with established supply chain availability, ensuring long-term procurement reliability
• Physical Compatibility: Footprint dimensions are slightly smaller (4.80mm x 4.80mm versus 5.20mm x 5.20mm), with maximum height within acceptable tolerance (1.30mm versus 1.20mm)

Frequently Asked Questions (FAQ)

Q: Can the Bourns SRR4011-151YL directly replace the Murata 34L154C without circuit modification?

A: Yes, for applications operating at or below 180 mA. The identical 150 µH inductance value and shielded construction ensure functional compatibility. The improved current rating and lower DC resistance provide design margin without requiring circuit changes.

Q: What is the impact of the ±30% inductance tolerance on the SRR4011-151YL compared to the ±20% tolerance of the 34L154C?

A: The wider tolerance of the substitute requires verification that the application can accommodate inductance variation within ±30% of the nominal 150 µH value. If the original design relied on the tighter ±20% tolerance, circuit performance must be evaluated accordingly.

Q: Are there physical footprint considerations when substituting these components?

A: The SRR4011-151YL has a smaller footprint (4.80mm x 4.80mm versus 5.20mm x 5.20mm) and slightly greater height (1.30mm versus 1.20mm). PCB layout must accommodate these dimensional differences. The smaller footprint may provide layout benefits, while the increased height requires clearance verification.

Q: What is the significance of the saturation current (Isat) specification on the SRR4011-151YL?

A: The 220 mA saturation current indicates the point at which the inductor's inductance begins to degrade due to core saturation. This specification is not provided for the 34L154C. For the substitute, operation should remain below 220 mA to maintain specified inductance performance.

Q: How do the compliance certifications compare between these components?

A: Both components are RoHS compliant and REACH unaffected. The SRR4011-151YL carries ROHS3 certification, representing the current regulatory standard. Both maintain MSL 1 (unlimited moisture sensitivity level), indicating no special moisture protection requirements during storage or handling.