Murata Power Solutions 34473C Shielded Wirewound Inductor

Part Overview

The Murata Power Solutions 34473C is a 47 µH shielded wirewound inductor rated for 410 mA continuous current with a maximum DC resistance of 850 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is designed for applications requiring compact, shielded inductive filtering and energy storage in power conversion circuits. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

34473C

Murata Power Solutions Inc.In Stock: 105834473C Datasheet

Current PartRFQ

SRR4018-470Y

Bourns Inc.In Stock: 9124SRR4018-470Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns SRR4018-470Y qualifies as a functional substitute for the Murata 34473C based on the following critical parameters:

Matching Electrical Specifications:

• Identical inductance value: 47 µH
• Identical operating temperature range: -40°C to 125°C
• Shielded construction maintained
• DC resistance within acceptable range: 600 mOhm Max (lower than 850 mOhm Max specification)
• Current rating exceeds minimum requirement: 620 mA vs. 410 mA

Matching Mechanical Specifications:

• Surface mount packaging maintained
• Identical maximum seated height: 2.00mm
• Compact footprint: 4.80mm x 4.80mm (comparable to 5.20mm x 5.20mm)
• Tape & Reel packaging format preserved

Compliance Alignment:

• RoHS3 compliant
• MSL 1 rating maintained
• REACH unaffected status preserved

The substitute part demonstrates superior electrical performance through lower DC resistance and higher current capacity while maintaining mechanical compatibility and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The Bourns SRR4018-470Y serves as a direct functional substitute for the Murata 34473C in applications where the specified electrical and mechanical parameters are required. Both components maintain Active product status with full RoHS3 compliance and unlimited moisture sensitivity ratings, ensuring regulatory compliance across industrial and commercial applications.

The substitute part provides measurable performance advantages: reduced DC resistance (600 mOhm vs. 850 mOhm) results in lower power dissipation, while the higher current rating (620 mA vs. 410 mA) provides additional design margin. The identical operating temperature range and shielded construction preserve functional equivalence for electromagnetic interference mitigation.

Footprint compatibility is maintained with comparable surface mount dimensions and identical maximum seated height. Both components are supplied in standard Tape & Reel packaging for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: What determines if the Bourns SRR4018-470Y can replace the Murata 34473C?

A: Substitution is valid when inductance value, operating temperature range, shielding type, mounting method, and package height remain constant. The Bourns part meets all these criteria with identical 47 µH inductance, -40°C to 125°C operating range, shielded construction, surface mount configuration, and 2.00mm maximum height.

Q: How do the DC resistance values affect circuit performance?

A: The Bourns substitute exhibits lower DC resistance (600 mOhm Max vs. 850 mOhm Max), resulting in reduced resistive losses and lower heat generation at equivalent current levels. This represents an improvement over the original specification.

Q: Are there footprint compatibility concerns between these parts?

A: Both components are surface mount with identical maximum seated height (2.00mm). The Bourns part has a slightly smaller footprint (4.80mm x 4.80mm vs. 5.20mm x 5.20mm), which is compatible with PCB layouts designed for the original part.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the Murata 34473C and Bourns SRR4018-470Y are RoHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the significance of the inductance tolerance difference?

A: The Murata part specifies ±20% tolerance while the Bourns part specifies ±30% tolerance. For applications with tight inductance requirements, the Murata specification provides tighter control. For general filtering and energy storage applications, the ±30% tolerance is typically acceptable.

Q: Can these parts be used interchangeably in automated assembly?

A: Yes. Both components are supplied in Tape & Reel packaging format suitable for standard pick-and-place assembly equipment. Identical maximum height ensures consistent solder reflow profiles.