Würth Elektronik 7446221010 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7446221010 is a 10 mH, 2-line common mode choke designed for power line filtering applications in through-hole mounting configurations. This component operates at 1.3A maximum current with 250 mOhm DC resistance and is rated for 250V AC operation across the temperature range of -40°C to 125°C. The part maintains Active product status with ROHS3 compliance and is currently in stock with 970 units available.

Equivalent and substitute parts are identified based on matching electrical performance parameters including current rating, voltage rating, operating temperature range, and mounting type, while accommodating variations in inductance values and physical dimensions where application requirements permit.

Substiute Parts

7446221010

Würth ElektronikIn Stock: 10647446221010 Datasheet

Current PartRFQ

B82721K2132U030

EPCOS - TDK ElectronicsIn Stock: 1613B82721K2132U030 Datasheet

Parametric EquivalentRFQ

ECMT1V1714H-2R0-R

Eaton - Electronics DivisionIn Stock: 2543ECMT1V1714H-2R0-R Datasheet

Parametric EquivalentRFQ

ECMT1V1714H-5R0-R

Eaton - Electronics DivisionIn Stock: 1909ECMT1V1714H-5R0-R Datasheet

Parametric EquivalentRFQ

ECMT1V1717S-2R0-R

Eaton - Electronics DivisionIn Stock: 2250ECMT1V1717S-2R0-R Datasheet

Parametric EquivalentRFQ

ECMT1V1717S-5R0-R

Eaton - Electronics DivisionIn Stock: 2430ECMT1V1717S-5R0-R Datasheet

Parametric EquivalentRFQ

ECMT1V2429S-5R0-R

Eaton - Electronics DivisionIn Stock: 1464ECMT1V2429S-5R0-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7446221010 are grouped based on the following critical parameters that determine functional equivalence:

Core Matching Criteria:

• Number of Lines: 2 (all substitutes maintain 2-line configuration)
• Mounting Type: Through Hole (all substitutes use through-hole mounting)
• Package / Case: Vertical, 4 PC Pin (all substitutes use identical pin configuration)
• Voltage Rating - AC: 250V (all substitutes rated for 250V AC)
• Operating Temperature: -40°C to 125°C (all substitutes maintain identical temperature range)
• RoHS Status: ROHS3 Compliant (all substitutes meet ROHS3 requirements)

Variable Parameters Allowing Substitution:

• Inductance @ Frequency: Range from 65 µH to 10 mH (application-dependent selection)
• Current Rating (Max): Range from 1.3A to 1.4A (all within acceptable tolerance)
• DC Resistance (Max): Range from 200 mOhm to 300 mOhm (acceptable variation for power line filtering)
• Physical Dimensions: Variations in length, width, and height (board layout dependent)

The substitute parts listed below meet all core matching criteria and are suitable for applications where the inductance value, current rating, and physical footprint are compatible with circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original 7446221010 component. Selection among substitutes depends on application-specific requirements:

For applications requiring inductance matching closest to 10 mH: The ECMT1V1714H-5R0-R and ECMT1V1717S-5R0-R provide 5 mH inductance at 1 kHz, representing the highest available inductance among substitutes while maintaining 1.4A current rating and 250V AC voltage rating.

For applications with reduced inductance requirements: The B82721K2132U030 from EPCOS - TDK Electronics offers 65 µH inductance with lower DC resistance (200 mOhm) and maintains the original 1.3A current rating. This part includes additional certifications (ENEC, UR, VDE) and is available in higher inventory (1555 units).

For applications with space constraints: The ECMT1V1714H series parts provide the smallest height profile (14.00mm) among Eaton substitutes, suitable for compact board layouts.

For applications with larger PCB footprints: The ECMT1V2429S-5R0-R accommodates larger physical dimensions (24.00mm x 20.00mm x 29.00mm) where board space is not a limiting factor.

All substitute parts operate across the identical -40°C to 125°C temperature range and maintain 250V AC voltage rating, ensuring thermal and electrical compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the B82721K2132U030 substitute for the 7446221010 in all applications?

A: The B82721K2132U030 maintains electrical compatibility through matching current rating (1.3A), voltage rating (250V AC), operating temperature range (-40°C to 125°C), and mounting configuration (through-hole, 2-line, vertical 4-pin). However, the inductance value differs significantly (65 µH versus 10 mH). Substitution is valid only where the application circuit can function with reduced inductance filtering characteristics.

Q: What is the difference between inductance measured at 10 kHz versus 1 kHz?

A: The measurement frequency affects the inductance value reported for the component. The 7446221010 specifies 10 mH @ 10 kHz, while Eaton substitutes specify inductance @ 1 kHz. These represent the same physical component measured under different frequency conditions. Application circuit design must account for the specified measurement frequency when selecting substitutes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts maintain ROHS3 compliance. The B82721K2132U030 is additionally noted as REACH Affected, while all other parts are REACH Unaffected. Both compliance statuses are acceptable for ROHS3 applications.

Q: Which substitute offers the best DC resistance performance?

A: The B82721K2132U030 provides the lowest DC resistance at 200 mOhm maximum, compared to 250 mOhm for the original 7446221010 and 300 mOhm for Eaton substitutes. Lower DC resistance reduces power dissipation in the component during operation.

Q: Can I use a substitute with higher current rating (1.4A) in place of the 1.3A rated original?

A: Yes. A component rated for 1.4A maximum current can safely operate in circuits designed for 1.3A maximum current, as the higher rating provides additional thermal and electrical margin. The circuit will not exceed the component's current handling capability.

Q: What are the physical dimension differences among substitutes?

A: Substitute parts vary in length (17.00mm to 24.00mm), width (12.00mm to 20.00mm), and height (14.00mm to 29.00mm). Board layout and available PCB space determine which physical dimensions are acceptable. Verify footprint compatibility before component selection.

Q: Do all substitutes use the same pin configuration?

A: Yes, all substitute parts use identical through-hole mounting with vertical, 4-pin package configuration, ensuring pin-compatible board layouts.