Würth Elektronik 7448640411 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7448640411 is a 3.3 mH, 2-line common mode choke designed for power line filtering applications. This through-hole component operates at 1.2A maximum current with a typical DC resistance of 210 mOhm and is rated for 250V AC operation across an operating temperature range of -40°C to 125°C. The component is Active status and ROHS3 compliant, making it suitable for modern electronic equipment requiring EMI suppression in power distribution circuits.

Equivalent parts may be required due to supply chain availability, regional sourcing preferences, or specific application requirements where alternative electrical or mechanical characteristics are acceptable within design tolerances.

Substiute Parts

7448640411

Würth ElektronikIn Stock: 13457448640411 Datasheet

Current PartRFQ

EV20-1.2-02-3M3

Schaffner EMC Inc.In Stock: 1276EV20-1.2-02-3M3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7448640411 is determined by the following critical parameters:

• Inductance Value: 3.3 mH nominal inductance, measured at specified frequency
• Current Rating: 1.2A maximum continuous current capacity
• Voltage Rating: 250V AC minimum
• Number of Lines: 2-line configuration for common mode filtering
• Mounting Type: Through-hole package with vertical 4-pin configuration
• Compliance: ROHS3 compliance and REACH unaffected status

The substitute part EV20-1.2-02-3M3 from Schaffner EMC Inc. meets these core substitution criteria. While measured inductance frequency differs (400 Hz vs. 10 kHz), both parts deliver the same 3.3 mH nominal inductance value required for the application. DC resistance variance (127 mOhm vs. 210 mOhm) represents an improvement in electrical performance. Physical dimensions and thermal operating ranges differ slightly but remain compatible with standard through-hole PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 7448640411 and Schaffner EV20-1.2-02-3M3 are Active status components with identical ROHS3 compliance and REACH unaffected designations, meeting current regulatory requirements for electronic component manufacturing and use.

The Schaffner substitute offers lower DC resistance (127 mOhm vs. 210 mOhm), resulting in reduced power dissipation and heat generation during operation. This characteristic may provide thermal performance benefits in applications with sustained 1.2A current loads.

Operating temperature range differs between parts: the Würth component operates from -40°C to 125°C, while the Schaffner component operates from -25°C to 100°C. Applications requiring full -40°C lower temperature operation must retain the original Würth part. Applications limited to -25°C minimum temperature can accommodate the Schaffner substitute.

Physical height differs by 0.138" (4.6mm), with the Schaffner part being taller. PCB layout clearance must be verified before substitution in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the Schaffner EV20-1.2-02-3M3 directly replace the Würth 7448640411 in all applications?

A: Direct replacement is possible when application requirements align with the Schaffner part specifications. The -25°C minimum operating temperature and increased height (26.00mm vs. 22.50mm) must be evaluated against specific design constraints. Both parts deliver 3.3 mH inductance at 1.2A with 250V AC rating.

Q: What is the significance of the different inductance measurement frequencies (10 kHz vs. 400 Hz)?

A: Inductance measurement frequency reflects the test conditions used by each manufacturer. Both parts are specified at 3.3 mH nominal inductance. The measurement frequency difference does not affect substitution eligibility when nominal inductance values match.

Q: Does the lower DC resistance of the Schaffner part affect circuit performance?

A: Lower DC resistance (127 mOhm vs. 210 mOhm) reduces resistive losses and heat generation. This represents an electrical improvement and does not negatively impact circuit performance. Applications sensitive to impedance characteristics should evaluate both parts within their specific frequency domain requirements.

Q: Are both parts suitable for through-hole PCB assembly?

A: Yes. Both components feature through-hole mounting with vertical 4-pin package configuration. Physical dimensions are similar (approximately 21mm length, 16-17mm width), with the primary difference being height. Standard through-hole assembly processes apply to both parts.

Q: What compliance certifications apply to both parts?

A: Both the Würth 7448640411 and Schaffner EV20-1.2-02-3M3 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components in EU and global markets.