Würth Elektronik 744834405 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744834405 is a 2-line common mode choke designed for power line filtering applications. This through-hole component features 5 mH inductance at 10 kHz with a 4A current rating and 50 mOhm DC resistance. The part is actively produced and widely stocked, with 1144 units available in inventory. Common mode chokes are essential components in EMI/RFI filtering circuits, power supply designs, and signal integrity applications where differential-mode signals must pass while common-mode noise is attenuated.

Substiute Parts

744834405

Würth ElektronikIn Stock: 1184744834405 Datasheet

Current PartRFQ

C301313A-302NHF

ITG Electronics, Inc.In Stock: 1104C301313A-302NHF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Würth Elektronik 744834405 is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration for pin-compatible replacement
• Mounting Type: Must be through-hole to maintain PCB assembly compatibility
• Package / Case: Must be horizontal, 4 PC pin configuration for mechanical fit
• Current Rating: Substitute must meet or exceed 4 A requirement
• DC Resistance: Substitute must not exceed 50 mOhm to maintain thermal and efficiency characteristics
• Inductance @ 10 kHz: Substitute must be within acceptable range for the application circuit
• Voltage Rating - AC: Must support minimum 250 V AC rating
• Operating Temperature: Must support -40°C to 125°C range
• RoHS Compliance: Must meet RoHS requirements for regulatory compliance

The ITG Electronics C301313A-302NHF qualifies as a parametric equivalent based on these criteria, with variations in inductance value (3 mH vs. 5 mH) and current rating (4.5 A vs. 4 A) that remain within acceptable substitution parameters for common mode choke applications.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744834405 and ITG Electronics C301313A-302NHF are active production components with full RoHS compliance, ensuring regulatory acceptance in current manufacturing environments. The Würth Elektronik part maintains higher inductance (5 mH) with standard DC resistance (50 mOhm), while the ITG Electronics substitute offers improved current handling (4.5 A) with lower DC resistance (47 mOhm) at a reduced inductance value (3 mH).

Selection between these parts depends on circuit-specific inductance requirements. The 5 mH specification of the primary part provides greater common-mode attenuation, while the 3 mH substitute is suitable for applications where lower inductance is acceptable or preferred. Both components support identical voltage and temperature specifications, ensuring thermal and electrical compatibility in the specified operating environment.

Frequently Asked Questions (FAQ)

Q: Can the ITG Electronics C301313A-302NHF directly replace the Würth Elektronik 744834405 in my circuit?

A: Direct replacement is possible if your circuit design accommodates the 3 mH inductance value. The substitute provides equivalent mechanical fit (through-hole, 4 PC pin horizontal package), superior current handling (4.5 A vs. 4 A), and lower DC resistance (47 mOhm vs. 50 mOhm). Verify that your EMI/RFI filtering requirements do not mandate the higher 5 mH inductance specification.

Q: What is the primary difference between these two parts?

A: The main difference is inductance value: 5 mH (Würth Elektronik) versus 3 mH (ITG Electronics). Both are 2-line common mode chokes with identical pin configurations, voltage ratings, and temperature ranges. The ITG part offers slightly better current capacity and lower resistance.

Q: Are both parts RoHS compliant?

A: Yes. The Würth Elektronik 744834405 is RoHS3 compliant, and the ITG Electronics C301313A-302NHF is RoHS compliant. Both meet current regulatory requirements for electronic component manufacturing.

Q: Will the different DC resistance values affect my circuit performance?

A: The difference between 50 mOhm and 47 mOhm is negligible for most applications. The ITG substitute's lower resistance may result in marginally reduced heat dissipation, which is beneficial. Verify power dissipation calculations if your application operates at maximum current ratings.

Q: Can I use the substitute in high-temperature applications?

A: Yes. Both parts support the identical operating temperature range of -40°C to 125°C, ensuring compatibility in thermal-demanding environments.