34L333C Equivalent & Substitute Parts

Part Overview

The 34L333C is a 33 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 360 mA continuous current with a maximum DC resistance of 1.18Ohm. This component is designed for surface mount applications in the 3400L series and operates across the temperature range of -40°C to 125°C. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

34L333C

Murata Power Solutions Inc.In Stock: 109634L333C Datasheet

Current PartRFQ

SRR4011-330YL

Bourns Inc.In Stock: 807SRR4011-330YL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 34L333C is based on the following critical parameters that must align with the original design requirements:

• Inductance Value: 33 µH nominal inductance is the primary functional requirement
• Current Rating: Minimum 360 mA to support the original circuit current demands
• Shielding: Shielded construction to maintain electromagnetic compatibility
• Operating Temperature: -40°C to 125°C range compatibility
• Mounting Type: Surface mount configuration for PCB assembly compatibility
• Physical Footprint: Comparable dimensions to ensure PCB layout feasibility

The SRR4011-330YL from Bourns Inc. meets these substitution criteria with a matching 33 µH inductance value, higher current rating (550 mA), shielded construction, identical operating temperature range, and compatible surface mount packaging.

Parameter Comparison

Engineering Selection Recommendations

The SRR4011-330YL is a direct functional substitute for the obsolete 34L333C. The substitute part offers the following advantages:

• Active Product Status: The SRR4011-330YL maintains active production status, ensuring long-term availability and supply chain stability
• Enhanced Current Capability: The 550 mA rating provides 53% additional current headroom compared to the 360 mA original specification
• Improved DC Resistance: The 860mOhm DCR is lower than the 1.18Ohm maximum of the original, resulting in reduced power dissipation
• Compliance Alignment: Both parts maintain RoHS compliance and identical moisture sensitivity ratings
• Thermal Compatibility: Matching operating temperature range ensures thermal performance equivalence
• Physical Compatibility: Comparable footprint dimensions support direct PCB layout substitution with minimal design modification

Frequently Asked Questions (FAQ)

Q: Can the SRR4011-330YL directly replace the 34L333C in existing designs?

A: Yes. Both components share the same 33 µH inductance value, shielded construction, surface mount configuration, and -40°C to 125°C operating temperature range. The substitute part's higher current rating and lower DC resistance provide improved performance margins.

Q: What is the impact of the different inductance tolerances (±20% vs ±30%)?

A: The 34L333C specifies ±20% tolerance while the SRR4011-330YL specifies ±30%. Circuit designs must accommodate the wider tolerance band of the substitute part. If the original design relied on the tighter tolerance specification, circuit performance validation is necessary.

Q: Are there physical footprint differences between these parts?

A: The 34L333C measures 5.20mm x 5.20mm with 1.20mm maximum height. The SRR4011-330YL measures 4.80mm x 4.80mm with 1.30mm maximum height. The substitute part is slightly smaller in lateral dimensions but marginally taller. PCB layout verification is required to confirm clearance compatibility.

Q: How does the lower DC resistance of the substitute affect circuit operation?

A: The SRR4011-330YL DCR of 860mOhm is lower than the 34L333C maximum of 1.18Ohm. This reduction decreases resistive losses and heat generation in the inductor, generally improving circuit efficiency. No adverse effects are anticipated from this parameter improvement.

Q: What compliance certifications apply to both parts?

A: Both the 34L333C and SRR4011-330YL are RoHS compliant, REACH unaffected, and classified under ECCN EAR99. Both maintain MSL 1 (Unlimited) moisture sensitivity ratings, indicating no special moisture handling requirements during storage or assembly.