B1135AS-2R2N=P3 Equivalent & Substitute Parts

Part Overview

The B1135AS-2R2N=P3 is a 2.2 µH shielded drum core wirewound inductor manufactured by Murata Electronics, rated for 7.3 A continuous current with a maximum DC resistance of 13 mOhm. 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 85°C and is designed for surface mount applications in nonstandard packaging.

Substiute Parts

B1135AS-2R2N=P3

Murata ElectronicsIn Stock: 944B1135AS-2R2N=P3 Datasheet

Current PartRFQ

7443330220

Würth ElektronikIn Stock: 12877443330220 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B1135AS-2R2N=P3 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 2.2 µH (exact match required)
• Core type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration
• Mounting: Surface mount technology
• Test frequency: 100 kHz

Secondary Compatibility Factors:

• Current rating must equal or exceed 7.3 A
• DC resistance must not exceed 13 mOhm (lower values acceptable)
• Operating temperature range must encompass or exceed -40°C to 85°C
• Saturation current must support the application's peak current demands
• Tolerance specification must be compatible with circuit requirements

The substitute part 7443330220 (Würth Elektronik WE-HCC series) meets all primary matching criteria and exceeds secondary compatibility requirements, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 7443330220 (Würth Elektronik WE-HCC series) is the qualified substitute for the obsolete B1135AS-2R2N=P3. Selection is based on the following engineering factors:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Compliance & Certifications: The substitute part is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original part's compliance status is not specified.

Performance Advantages: The substitute provides superior electrical performance with lower DC resistance (4.8 mOhm vs. 13 mOhm), higher current rating (16.5 A vs. 7.3 A), and higher saturation current (22 A vs. 5.5 A). These improvements provide design margin and thermal efficiency benefits.

Temperature Range: The substitute extends the operating temperature range to -40°C to 125°C, providing broader environmental compatibility.

Tolerance Improvement: The substitute offers tighter inductance tolerance (±20% vs. ±30%), supporting more precise circuit performance.

Physical Considerations: The substitute features larger physical dimensions (10.90mm × 10.00mm × 9.70mm vs. 8.40mm × 8.30mm × 5.00mm). PCB layout verification is required to confirm mechanical fit within existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 7443330220 directly replace the B1135AS-2R2N=P3 in existing designs?

A: The 7443330220 is electrically compatible as a substitute. However, the larger physical dimensions require verification that the PCB footprint and component placement accommodate the increased size. The improved electrical performance (lower DCR, higher current rating) is beneficial for circuit operation.

Q: What are the key differences between these two inductors?

A: Both parts share identical inductance (2.2 µH), core material (ferrite), shielding, and test frequency. The substitute provides superior current handling (16.5 A vs. 7.3 A), lower resistance (4.8 mOhm vs. 13 mOhm), tighter tolerance (±20% vs. ±30%), extended temperature range (-40°C to 125°C vs. -40°C to 85°C), and active product status versus obsolete.

Q: Are there any packaging or supply chain considerations?

A: The substitute is supplied in Cut Tape (CT) and Digi-Reel® packaging with 1261 pieces currently in stock, compared to 836 pieces of the original part. The substitute's active status ensures continued availability.

Q: Does the lower DC resistance of the substitute affect circuit design?

A: Lower DC resistance reduces resistive losses and heat generation, which is advantageous for circuit efficiency. No circuit redesign is required; the substitute performs as a direct functional equivalent with improved thermal characteristics.

Q: What compliance certifications apply to the substitute part?

A: The 7443330220 is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.