Murata 82474C 470µH Surface Mount Inductor Equivalent & Substitute Parts

Part Overview

The Murata 82474C is a 470 µH unshielded wirewound inductor rated for 70 mA continuous current in a 1210 (3225 Metric) surface mount package. This component is designed for applications requiring fixed inductance filtering, energy storage, and signal conditioning in compact form factors. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for standard industrial and commercial electronics manufacturing.

Substitute parts become necessary when primary inventory is unavailable, when design requirements permit higher current ratings or improved thermal performance, or when alternative packaging configurations better serve manufacturing constraints.

Substiute Parts

82474C

Murata Power Solutions Inc.In Stock: 216482474C Datasheet

Current PartRFQ

SDR0302-471KL

Bourns Inc.In Stock: 4454SDR0302-471KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Murata 82474C is determined by the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 470 µH (exact match required)
• Inductance tolerance: ±10% (matching tolerance band)
• Shielding configuration: Unshielded (electromagnetic isolation characteristics must align)
• Mounting type: Surface Mount (assembly process compatibility)
• RoHS3 compliance: Required for regulatory alignment

Secondary Compatibility Parameters:

• Current rating: Substitute must equal or exceed 70 mA minimum
• DC resistance: Lower or equal values preferred to minimize power dissipation
• Operating temperature range: Must encompass or exceed -40°C to 85°C
• Package footprint: Physical dimensions must accommodate PCB layout constraints

The Bourns SDR0302-471KL qualifies as a direct substitute based on matching inductance (470 µH), tolerance (±10%), unshielded configuration, surface mount assembly, and RoHS3 compliance. The substitute provides enhanced current handling (105 mA vs. 70 mA) and improved DC resistance (14.3 Ohm vs. 16.8 Ohm), with extended operating temperature range (-40°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

Murata 82474C Selection Criteria:

• Primary inventory availability with 2104 units in stock
• Established design validation and qualification history
• Wirewound construction with standard core material
• Suitable for applications operating within -40°C to 85°C thermal envelope
• Preferred when exact component matching is required for design continuity

Bourns SDR0302-471KL Selection Criteria:

• Superior current handling capacity (105 mA vs. 70 mA) for margin-critical designs
• Lower DC resistance (14.3 Ohm vs. 16.8 Ohm) reduces thermal dissipation
• Extended operating temperature range (-40°C to 125°C) for harsh environment applications
• Drum core ferrite construction provides alternative magnetic core technology
• Higher inventory availability (4390 units in stock)
• Nonstandard package footprint requires PCB layout verification

Both parts maintain full RoHS3 compliance, REACH unaffected status, and EAR99 export classification. Selection between these components depends on thermal performance requirements, available PCB space, and current margin specifications rather than regulatory or compliance constraints.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0302-471KL directly replace the Murata 82474C without circuit redesign?

A: Substitution is electrically valid based on matching inductance (470 µH), tolerance (±10%), and unshielded configuration. However, the Bourns part uses a nonstandard package footprint (3.00mm × 2.80mm vs. 3.20mm × 2.50mm), requiring PCB layout verification. The lower self-resonant frequency (5 MHz vs. 9 MHz) may affect high-frequency performance in applications above 5 MHz.

Q: What are the key differences in core material between these inductors?

A: The Murata 82474C uses standard wirewound construction with unspecified core material. The Bourns SDR0302-471KL employs drum core ferrite construction, which provides different magnetic characteristics and saturation behavior (130 mA saturation current specified for the Bourns part).

Q: Is the higher current rating of the Bourns part always beneficial?

A: Higher current rating (105 mA vs. 70 mA) provides design margin and reduces thermal stress at rated operating current. However, this does not automatically improve circuit performance. The lower DC resistance (14.3 Ohm vs. 16.8 Ohm) reduces I²R losses, which is advantageous in power-sensitive applications.

Q: How do the operating temperature ranges affect substitution decisions?

A: The Murata part operates from -40°C to 85°C, while the Bourns part extends to 125°C. If the application requires operation above 85°C, only the Bourns SDR0302-471KL is suitable. For standard industrial temperature ranges (-40°C to 85°C), both parts are functionally equivalent.

Q: What is the significance of the different self-resonant frequencies?

A: The Murata part has a 9 MHz self-resonant frequency compared to 5 MHz for the Bourns part. In applications using these inductors above 5 MHz, the Bourns part transitions to capacitive behavior, potentially affecting circuit stability. The Murata part maintains inductive behavior to 9 MHz.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are RoHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. No compliance differentiation exists between the two components.