34L473C Equivalent & Substitute Parts

Part Overview

The 34L473C is a 47 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 310 mA maximum current with 1.82Ohm DC resistance. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across the industrial temperature range of -40°C to 125°C and is housed in a nonstandard surface mount package measuring 5.20mm x 5.20mm.

Substiute Parts

34L473C

Murata Power Solutions Inc.In Stock: 103134L473C Datasheet

Current PartRFQ

SRR4011-470YL

Bourns Inc.In Stock: 1728SRR4011-470YL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 34L473C is determined by the following critical parameters:

• Inductance Value: 47 µH (exact match required)
• Current Rating: Minimum 310 mA (substitute must meet or exceed)
• DC Resistance: Lower values preferred to reduce power dissipation
• Shielding: Shielded configuration required
• Operating Temperature Range: -40°C ~ 125°C (minimum requirement)
• Mounting Type: Surface mount configuration
• Environmental Compliance: RoHS compliance required

The SRR4011-470YL from Bourns Inc. satisfies these substitution criteria with matching inductance, higher current rating capability, lower DC resistance, and equivalent environmental compliance.

Parameter Comparison

Engineering Selection Recommendations

The SRR4011-470YL is a direct functional substitute for the 34L473C based on the following factors:

• Inductance Match: Both components provide 47 µH inductance value
• Current Capability: The SRR4011-470YL exceeds the 310 mA requirement with 480 mA rating, providing design margin
• Resistance Advantage: Lower DCR (1.25Ohm vs 1.82Ohm) reduces power dissipation in the application
• Compliance Status: Both components meet RoHS requirements; the substitute carries ROHS3 compliance
• Active Product Status: The SRR4011-470YL is an active product with ongoing manufacturer support and availability
• Environmental Specifications: Identical operating temperature range and moisture sensitivity rating ensure thermal and environmental compatibility

Physical dimensions differ slightly; the substitute is marginally smaller in footprint (4.80mm vs 5.20mm) with negligible height increase (1.30mm vs 1.20mm), suitable for most PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the SRR4011-470YL directly replace the 34L473C in existing designs?

A: Yes. Both components share the same 47 µH inductance, operating temperature range, and shielded surface mount configuration. The substitute provides higher current rating and lower DC resistance, making it functionally compatible for the 34L473C application.

Q: What is the impact of the tolerance difference (±20% vs ±30%)?

A: The 34L473C specifies ±20% tolerance while the SRR4011-470YL specifies ±30%. For applications requiring tighter inductance tolerance, this difference must be evaluated against circuit performance requirements. Both tolerances fall within standard inductor specifications.

Q: Are there physical footprint considerations?

A: The SRR4011-470YL footprint is slightly smaller (4.80mm x 4.80mm vs 5.20mm x 5.20mm). Height difference is minimal (1.30mm vs 1.20mm). PCB layout verification is recommended to confirm clearance compatibility, though the smaller footprint typically presents no placement obstacles.

Q: Why is the 34L473C obsolete?

A: The 34L473C is classified as obsolete by the manufacturer. The SRR4011-470YL from Bourns is an active product with current production and supply chain availability, making it the recommended alternative for new designs and production continuity.

Q: Are both components RoHS compliant?

A: Yes. The 34L473C is RoHS Compliant, and the SRR4011-470YL is ROHS3 Compliant. Both meet environmental regulatory requirements for restricted substance use.

Q: What is the current saturation specification for the substitute?

A: The SRR4011-470YL specifies a saturation current (Isat) of 400mA, which exceeds the 310 mA operating requirement of the original design, providing additional design margin.