DLW5ATH331MQ2L Equivalent & Substitute Parts

Part Overview

The DLW5ATH331MQ2L is a 2-line common mode choke manufactured by Murata Electronics, designed for power and signal line filtering applications. This surface mount component delivers 330 Ohms impedance at 100 MHz with a maximum current rating of 2.5A and operates across the temperature range of -40°C to 125°C. The part is discontinued at DiGi Electronics, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

DLW5ATH331MQ2L

Murata ElectronicsIn Stock: 1168DLW5ATH331MQ2L Datasheet

Current PartRFQ

SRF7035A-301Y

Bourns Inc.In Stock: 1791SRF7035A-301Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DLW5ATH331MQ2L is determined by the following critical parameters:

• Number of Lines: Must remain 2-line configuration for signal path compatibility
• Impedance @ 100 MHz: Target range 300-330 Ohms to maintain filtering performance
• Current Rating: Minimum 2.5A to support circuit requirements
• DC Resistance: Lower values preferred for reduced power dissipation
• Voltage Rating - DC: Minimum 50V for electrical safety margin
• Operating Temperature Range: Must support -40°C to 125°C
• Mounting Type: Surface mount required for PCB integration
• Compliance: AEC-Q200 rating and ROHS3 compliance required
• Package Footprint: Physical dimensions must accommodate existing PCB layout

The SRF7035A-301Y from Bourns Inc. meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The SRF7035A-301Y qualifies as a direct substitute based on the following factors:

Electrical Compatibility: The impedance specification of 300 Ohms at 100 MHz is within acceptable tolerance of the original 330 Ohms specification. The substitute provides superior current handling capacity (5A versus 2.5A) and lower DC resistance (10mOhm versus 27mOhm), resulting in reduced thermal dissipation in the application circuit.

Voltage and Temperature Ratings: The substitute exceeds the original voltage rating (80V versus 50V) and maintains identical operating temperature range (-40°C to 125°C), ensuring compatibility across all environmental conditions.

Compliance and Certifications: Both components carry AEC-Q200 automotive qualification and ROHS3 compliance, with identical moisture sensitivity levels (MSL 1 - Unlimited). These certifications confirm suitability for equivalent application environments.

Product Availability: The SRF7035A-301Y maintains active product status with confirmed inventory availability, addressing the discontinuation of the original part.

Physical Considerations: The substitute features a larger footprint (7.00mm x 6.00mm versus 5.00mm x 3.60mm) and increased height (4.60mm versus 2.35mm). PCB layout verification is required to confirm accommodation of these dimensional changes. The package transition from 4 PC Pad to 4 J-Lead requires footprint redesign.

Frequently Asked Questions (FAQ)

Q: Can the SRF7035A-301Y be used as a direct pin-for-pin replacement?

A: No. While both components are 2-line common mode chokes with compatible electrical specifications, the package types differ (4 PC Pad versus 4 J-Lead). PCB footprint redesign is required. Physical dimensions also differ, necessitating layout verification.

Q: What is the impedance tolerance between the original and substitute part?

A: The original DLW5ATH331MQ2L specifies 330 Ohms at 100 MHz, while the SRF7035A-301Y specifies 300 Ohms at 100 MHz. This represents approximately 9% variation. Both values fall within typical common mode choke impedance tolerances for filtering applications.

Q: Does the substitute part support the same current requirements?

A: The substitute exceeds the original current rating. The DLW5ATH331MQ2L is rated for 2.5A maximum, while the SRF7035A-301Y is rated for 5A maximum. This provides additional design margin and thermal headroom in the application circuit.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the DLW5ATH331MQ2L and SRF7035A-301Y carry AEC-Q200 qualification, confirming suitability for automotive-grade applications.

Q: What is the difference in DC resistance between these components?

A: The original part specifies 27mOhm maximum DC resistance, while the substitute specifies 10mOhm maximum. Lower DC resistance in the substitute reduces resistive losses and heat generation during operation.

Q: Can the substitute part be used in the same PCB layout without modification?

A: No. The substitute requires PCB layout modification due to different package types and larger physical dimensions. Footprint redesign and placement verification are necessary before implementation.

Q: Are the voltage ratings compatible with the original application?

A: Yes. The original part is rated for 50V DC, while the substitute is rated for 80V DC. The substitute provides higher voltage margin, making it suitable for applications requiring the original 50V specification.