84474C Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions Inc. 84474C is a 470 µH unshielded wirewound inductor rated for 140 mA continuous current with 8.5Ohm maximum DC resistance. This surface mount component operates across the -40°C to 125°C temperature range and is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

84474C

Murata Power Solutions Inc.In Stock: 218284474C Datasheet

Current PartRFQ

SDR0403-471KL

Bourns Inc.In Stock: 6110SDR0403-471KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 84474C is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value of 470 µH within ±10% tolerance
• Current rating of 130 mA minimum (acceptable reduction from 140 mA specification)
• DC resistance not exceeding 8.5Ohm maximum
• Operating temperature range covering -40°C to 125°C

Mechanical Compatibility Criteria:

• Surface mount configuration required
• Unshielded construction
• Nonstandard package classification
• Physical dimensions compatible with 84474C footprint

Compliance Requirements:

• RoHS3 compliance mandatory
• Moisture Sensitivity Level 1 (Unlimited)
• REACH Unaffected status

The Bourns Inc. SDR0403-471KL meets all substitution criteria through equivalent inductance, acceptable current rating reduction, superior DC resistance performance, and full compliance alignment.

Parameter Comparison

Engineering Selection Recommendations

84474C (Murata Power Solutions Inc.) — Primary selection for applications requiring the full 140 mA current rating. Active product status with established supply chain. RoHS3 and REACH compliance confirmed. Suitable for standard production environments with 2135 units in current inventory.

SDR0403-471KL (Bourns Inc.) — Valid substitute for applications with maximum current requirements of 130 mA or less. Offers improved DC resistance performance at 7 Ohm maximum versus 8.5 Ohm specification. Active product status with robust inventory availability (6100 units). RoHS3 and REACH compliance confirmed. Ferrite drum core construction provides enhanced Q factor (50 @ 796kHz) and defined self-resonant frequency (3MHz) for applications benefiting from these characteristics.

Both components maintain identical operating temperature ranges, inductance values, and compliance certifications. Selection between these parts depends on application current requirements and whether the enhanced electrical characteristics of the Bourns component provide system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-471KL replace the 84474C in all applications?

A: The SDR0403-471KL is suitable for applications where the circuit current does not exceed 130 mA. If your design requires the full 140 mA rating, the 84474C remains the appropriate selection. Both components share identical inductance, tolerance, temperature range, and compliance specifications.

Q: What is the difference between the Murata and Bourns inductor construction?

A: The 84474C uses wirewound construction on an unspecified core material. The SDR0403-471KL uses drum core wirewound construction with ferrite material, which provides measurable Q factor and self-resonant frequency characteristics. Both are unshielded surface mount components.

Q: Are there physical dimension differences between these parts?

A: Yes. The 84474C measures 0.177" L × 0.130" W × 0.114" H (4.50mm × 3.30mm × 2.90mm). The SDR0403-471KL measures 0.177" L × 0.157" W × 0.138" H (4.50mm × 4.00mm × 4.60mm). Length is identical; width and height are slightly larger on the Bourns component. Verify PCB layout compatibility before substitution.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the 84474C and SDR0403-471KL carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage or handling.

Q: What compliance certifications apply to both components?

A: Both parts are RoHS3 compliant and REACH Unaffected. Both carry EAR99 export classification. Regulatory requirements are equivalent between the two options.

Q: Which part offers better DC resistance performance?

A: The SDR0403-471KL provides superior DC resistance at 7 Ohm maximum compared to the 84474C specification of 8.5 Ohm maximum. This represents approximately 18% lower resistance, which reduces power dissipation in current-limited applications.