Würth Elektronik 784231371 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 784231371 is a 2-line common mode choke (CMC) designed for signal line filtering in surface mount applications. This component provides 370 Ohms impedance at 100 MHz with a maximum current rating of 280mA and is qualified to AEC-Q200 automotive standards. The part is currently active in production with 1471 pieces available in stock.

Common mode chokes are essential filtering components in high-speed signal applications to suppress electromagnetic interference and maintain signal integrity. Equivalent substitute parts are identified based on matching electrical specifications, mechanical dimensions, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

784231371

Würth ElektronikIn Stock: 1500784231371 Datasheet

Current PartRFQ

744231371

Würth ElektronikIn Stock: 3532744231371 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 784231371 are identified through parametric equivalence. The substitution logic is based on the following critical parameters that must match exactly:

Electrical Parameters (Must Match):

• Impedance @ Frequency: 370 Ohms @ 100 MHz
• Current Rating (Max): 280mA
• DC Resistance (DCR) (Max): 450mOhm
• Voltage Rating - DC: 50V
• Operating Temperature Range: -40°C ~ 125°C

Mechanical Parameters (Must Match):

• Number of Lines: 2
• Mounting Type: Surface Mount
• Size / Dimension: 0.079" L x 0.047" W (2.00mm x 1.20mm)
• Height (Max): 0.055" (1.40mm)
• Package / Case: Horizontal, 4 PC Pad

Compliance Parameters (Must Match):

• Filter Type: Signal Line
• Ratings: AEC-Q200
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744231371 (WE-CNSW series) is a parametric equivalent substitute for the 784231371 (WE-CNSA series). Both parts are manufactured by Würth Elektronik and meet identical electrical, mechanical, and compliance specifications.

Compliance Basis for Substitution:

• Both parts carry AEC-Q200 automotive qualification
• Both parts are ROHS3 compliant
• Both parts have MSL rating of 1 (Unlimited moisture sensitivity)
• Both parts are active products in current production

The primary difference between these parts is the internal series designation (WE-CNSA versus WE-CNSW), which reflects different internal construction or manufacturing processes within Würth Elektronik's product line. This difference does not affect electrical performance, mechanical compatibility, or compliance certifications.

The 744231371 substitute part has higher inventory availability (3522 pieces) compared to the primary part (1471 pieces), making it a viable alternative for procurement planning.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744231371 be used as a direct replacement for the 784231371?

A: Yes. The 744231371 is a parametric equivalent with identical electrical specifications (370 Ohms @ 100 MHz, 280mA, 450mOhm DCR), mechanical dimensions (2.00mm x 1.20mm x 1.40mm), and compliance certifications (AEC-Q200, ROHS3). Both parts are surface mount, 2-line common mode chokes in the same package configuration.

Q: What is the difference between the WE-CNSA and WE-CNSW series?

A: The series designation indicates different internal construction or manufacturing processes within Würth Elektronik's common mode choke product line. Both series meet identical electrical and mechanical specifications for this application. The series difference does not affect performance or compatibility.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the 784231371 and 744231371 carry AEC-Q200 qualification, which certifies compliance with automotive reliability and quality standards.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage or handling.

Q: Can these parts be used in high-temperature applications?

A: Both parts are rated for operating temperatures from -40°C to 125°C, making them suitable for industrial and automotive high-temperature environments within this range.

Q: Are there any RoHS compliance concerns with either part?

A: No. Both parts are ROHS3 compliant, meeting all current European Union Restriction of Hazardous Substances regulations.

Q: What is the maximum DC voltage rating for these common mode chokes?

A: Both parts have a maximum DC voltage rating of 50V.

Q: Are these parts available in different packaging formats?

A: Both parts are supplied in Tape & Reel (TR) packaging, which is standard for surface mount component automation and assembly processes.