Würth Elektronik 744842565 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744842565 is a 2-line common mode choke (CMC) designed for power line filtering applications. This through-hole component operates at 65 µH inductance at 100 kHz with a maximum current rating of 5A and DC resistance of 14.3 mOhm. The part is currently active in production and RoHS3 compliant, making it suitable for modern electronic equipment requiring EMI suppression in power distribution circuits.

Substitute parts may be required due to inventory constraints, design optimization needs, or application-specific parameter adjustments while maintaining functional compatibility within the power line filtering category.

Substiute Parts

744842565

Würth ElektronikIn Stock: 754744842565 Datasheet

Current PartRFQ

7448025003

Würth ElektronikIn Stock: 13767448025003 Datasheet

Parametric EquivalentRFQ

7448225007

Würth ElektronikIn Stock: 23077448225007 Datasheet

Parametric EquivalentRFQ

744823601

Würth ElektronikIn Stock: 1947744823601 Datasheet

Parametric EquivalentRFQ

DCN181320V1-102HF

ITG Electronics, Inc.In Stock: 998DCN181320V1-102HF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744842565 is determined by the following critical parameters:

• Filter Type: Must be Power Line (all candidates meet this requirement)
• Number of Lines: Must be 2-line configuration (all candidates meet this requirement)
• Mounting Type: Must be Through Hole (all candidates meet this requirement)
• Package / Case: Must be Vertical, 4 PC Pin (all candidates meet this requirement)
• Voltage Rating - AC: Must be 250V (all candidates meet this requirement)
• Operating Temperature Range: Must support -40°C ~ 125°C (all candidates meet this requirement)
• Current Rating: Must be ≥5A (all candidates meet or exceed this requirement)
• DC Resistance: Must be ≤15 mOhm (all candidates meet this requirement)
• RoHS Compliance: Must be RoHS compliant (all candidates meet this requirement)

The four substitute parts listed below satisfy all mandatory electrical and mechanical compatibility criteria for direct substitution in power line common mode choke applications.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts maintain active product status and full RoHS compliance, ensuring long-term availability and regulatory conformance. Selection among these alternatives should be based on specific application requirements:

7448025003 (Würth Elektronik WE-CMBNC): Offers the highest inductance value at 2.5 mH @ 10 kHz with matching current and voltage ratings. Footprint dimensions are nearly identical to the main part (18.00mm vs 18.50mm length). Highest inventory availability at 1271 pieces.

7448225007 (Würth Elektronik WE-CMB HC): Provides 700 µH @ 100 kHz inductance, closest to the main part's frequency specification. Identical footprint dimensions and height. Largest inventory stock at 2197 pieces.

744823601 (Würth Elektronik WE-CMB): Delivers 1 mH @ 10 kHz with superior current rating of 6A and lowest DC resistance at 13 mOhm. Larger footprint (25.00mm x 17.00mm) and height (26.50mm) require PCB layout verification. 1928 pieces in stock.

DCN181320V1-102HF (ITG Electronics DCN181320V): Provides 1 mH @ 10 kHz with 5.4A current rating. Compact height of 20.50mm. Different manufacturer with RoHS compliance (non-RoHS3 designation). 984 pieces available.

Frequently Asked Questions (FAQ)

Q: Can I use part 744823601 as a direct replacement if my PCB layout is constrained?

A: Part 744823601 has larger dimensions (25.00mm L x 17.00mm W x 26.50mm H) compared to the main part (18.50mm L x 14.50mm W x 22.00mm H). PCB layout verification is required before substitution to confirm clearance and mounting compatibility.

Q: What is the difference between inductance specifications at different frequencies?

A: The main part specifies 65 µH @ 100 kHz, while substitute parts specify inductance at 10 kHz. These measurements reflect the frequency-dependent behavior of common mode chokes. Selection should align with your circuit's operating frequency requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Three substitute parts (7448025003, 7448225007, 744823601) are RoHS3 compliant. Part DCN181320V1-102HF is RoHS compliant but not specifically designated as RoHS3. Both designations meet current regulatory requirements.

Q: Which substitute part has the best current handling capability?

A: Part 744823601 offers the highest current rating at 6A with the lowest DC resistance at 13 mOhm, providing superior thermal performance and lower power dissipation compared to the main part's 5A rating and 14.3 mOhm resistance.

Q: Can I substitute based on inductance value alone?

A: No. All parameters listed in the Key Parameters table must be verified for compatibility. While inductance is critical, current rating, DC resistance, voltage rating, operating temperature, and physical dimensions must all meet or exceed application requirements.

Q: What is the significance of DC resistance (DCR) in common mode choke selection?

A: DC resistance directly impacts power dissipation and thermal performance. Lower DCR values reduce heat generation. The main part's 14.3 mOhm is comparable to substitute options (13-16 mOhm range), ensuring similar thermal characteristics across all candidates.

Q: Are the 4 PC Pin packages identical across all parts?

A: All parts use Vertical, 4 PC Pin configuration. However, physical dimensions vary. Parts 7448025003 and 7448225007 have nearly identical footprints to the main part. Part 744823601 is significantly larger, and DCN181320V1-102HF is more compact. Verify PCB layout compatibility before substitution.