B1135AS-470M=P3 Equivalent & Substitute Parts

Part Overview

The B1135AS-470M=P3 is a 47 µH shielded drum core wirewound inductor manufactured by Murata Electronics, rated for 1.6 A continuous current with a maximum DC resistance of 150 mOhm. This component is designed for surface mount applications in nonstandard packaging. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications requiring 47 µH inductance in shielded configurations.

Substiute Parts

B1135AS-470M=P3

Murata ElectronicsIn Stock: 906B1135AS-470M=P3 Datasheet

Current PartRFQ

744771147

Würth ElektronikIn Stock: 2276744771147 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the B1135AS-470M=P3 is determined by the following critical parameters:

• Inductance Value: Must be 47 µH with ±20% tolerance
• Core Type & Shielding: Ferrite core with shielding required
• Mounting Configuration: Surface mount, drum core wirewound construction
• Current Handling: Minimum 1.6 A continuous rating; saturation current minimum 1.2 A
• DC Resistance: Maximum 150 mOhm acceptable for circuit performance
• Temperature Range: Operating range -40°C to 85°C minimum

The Würth Elektronik 744771147 meets all substitution criteria with improved electrical performance characteristics while maintaining the same inductance value, core material, shielding type, and surface mount configuration.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744771147 is the qualified substitute for the obsolete B1135AS-470M=P3. Selection is based on the following engineering factors:

• Product Availability: The original Murata part is obsolete; the Würth Elektronik alternative is active and in production
• Electrical Compatibility: Both parts maintain identical 47 µH inductance with ±20% tolerance and ferrite shielded drum core construction
• Performance Enhancement: The substitute provides superior current handling (2.21 A vs. 1.6 A) and lower DC resistance (75 mOhm vs. 150 mOhm), reducing thermal losses
• Compliance & Certification: The Würth Elektronik part carries AEC-Q200 automotive qualification and ROHS3 compliance, with extended operating temperature range (-40°C to 125°C)
• Mechanical Compatibility: Both components use surface mount configuration with nonstandard packaging; physical dimensions differ (12.00mm x 12.00mm vs. 8.40mm x 8.30mm), requiring PCB layout verification

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744771147 directly replace the Murata B1135AS-470M=P3 without circuit modification?

A: Electrical substitution is valid. Both parts provide 47 µH inductance with identical tolerance and ferrite shielded construction. However, physical dimensions differ; PCB footprint and layout must be verified before implementation.

Q: What are the key advantages of using the Würth Elektronik substitute?

A: The 744771147 offers higher current rating (2.21 A vs. 1.6 A), lower DC resistance (75 mOhm vs. 150 mOhm), extended temperature range (-40°C to 125°C vs. -40°C to 85°C), and active product status with AEC-Q200 certification.

Q: Are there packaging differences between these parts?

A: Yes. The original Murata part measures 8.40mm x 8.30mm x 5.00mm; the Würth Elektronik substitute measures 12.00mm x 12.00mm x 6.00mm. The substitute is supplied in Tape & Reel packaging. PCB design must accommodate the larger footprint.

Q: Does the Würth Elektronik part meet the same environmental specifications?

A: Both parts have MSL 1 (Unlimited) moisture sensitivity. The substitute extends the operating temperature range to 125°C and includes ROHS3 and REACH compliance documentation.

Q: What is the inductance frequency test condition for each part?

A: The Murata part is tested at 100 kHz; the Würth Elektronik part is tested at 1 kHz. Both maintain the specified 47 µH inductance within ±20% tolerance at their respective test frequencies.