Würth Elektronik 7448022010 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7448022010 is a 10 mH Common Mode Choke (CMC) designed for two-line power line filtering applications. This through-hole component operates at 2A maximum current with 85 mOhm DC resistance and is rated for 250V AC operation across the temperature range of -40°C to 125°C. The part is Active status and ROHS3 compliant, making it suitable for modern electronic equipment requiring EMI suppression in power distribution circuits.

Equivalent and substitute parts are identified when design requirements permit variation in inductance value, current rating, or DC resistance while maintaining compatibility with the mounting footprint, voltage rating, and operational temperature range.

Substiute Parts

7448022010

Würth ElektronikIn Stock: 8597448022010 Datasheet

Current PartRFQ

7446222003

Würth ElektronikIn Stock: 12037446222003 Datasheet

Parametric EquivalentRFQ

B82721K2222U030

EPCOS - TDK ElectronicsIn Stock: 3612B82721K2222U030 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7448022010 are identified based on the following criteria:

Mandatory Compatibility Parameters:

• Number of Lines: 2 (all substitutes must be 2-line configurations)
• Mounting Type: Through Hole (all substitutes must use through-hole mounting)
• Voltage Rating - AC: 250V (all substitutes must support 250V AC minimum)
• Operating Temperature Range: -40°C ~ 125°C (all substitutes must cover this range)
• Package / Case: Vertical, 4 PC Pin (all substitutes must use this pin configuration)

Variable Parameters (Allowed to Differ):

• Inductance @ Frequency: 10 mH @ 10 kHz (substitutes may have different inductance values)
• Current Rating (Max): 2A (substitutes may have equal or higher current ratings)
• DC Resistance (Max): 85 mOhm (substitutes may have lower or equal DC resistance)

The identified substitutes meet all mandatory compatibility requirements while offering variations in inductance and electrical characteristics suitable for alternative circuit designs.

Parameter Comparison

Engineering Selection Recommendations

7446222003 (Würth Elektronik WE-LF Series)

This substitute offers reduced inductance (3.3 mH vs. 10 mH) with improved DC resistance (75 mOhm vs. 85 mOhm). Selection is appropriate for applications where lower inductance filtering is acceptable and reduced power dissipation is beneficial. The part maintains identical current rating and voltage specifications. Physical dimensions are larger (24.60mm x 16.00mm x 25.50mm), requiring PCB layout verification. ROHS3 compliance and Active product status confirm ongoing availability and regulatory alignment.

B82721K2222U030 (EPCOS - TDK Electronics B82721 Series)

This substitute operates at significantly lower inductance (10 µH vs. 10 mH) with superior DC resistance (70 mOhm vs. 85 mOhm) and higher current rating (2.2A vs. 2A). Selection is appropriate for high-frequency filtering applications and circuits requiring minimal power loss. Physical dimensions are comparable to the main part (18.20mm x 13.20mm x 20.40mm), facilitating direct PCB substitution. ROHS3 compliance and Active product status confirm regulatory compliance. Additional certifications (ENEC, UR, VDE) provide expanded approval coverage for specific regional requirements.

Frequently Asked Questions (FAQ)

Q: Can I use the 7446222003 as a direct replacement for the 7448022010?

A: The 7446222003 is mechanically compatible (through-hole, 4-pin vertical package) and electrically compatible (2A current, 250V AC, -40°C to 125°C operating range). However, the inductance is significantly lower (3.3 mH vs. 10 mH). Substitution is valid only if circuit design permits reduced inductance filtering. PCB layout must accommodate the larger physical dimensions (24.60mm x 16.00mm).

Q: What is the primary difference between the 7448022010 and B82721K2222U030?

A: The main differences are inductance value (10 mH vs. 10 µH) and measurement frequency (10 kHz vs. 100 kHz). The B82721K2222U030 provides higher current capacity (2.2A vs. 2A) and lower DC resistance (70 mOhm vs. 85 mOhm). Physical dimensions are similar, supporting direct PCB substitution. The B82721K2222U030 includes additional certifications (ENEC, UR, VDE).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The main part 7448022010 and both substitutes (7446222003 and B82721K2222U030) are ROHS3 compliant, confirming compliance with hazardous substance restrictions in modern electronics manufacturing.

Q: Do the substitute parts fit the same PCB footprint?

A: All parts use through-hole, vertical 4-pin package configuration. The 7446222003 has larger physical dimensions (24.60mm x 16.00mm x 25.50mm) compared to the main part (18.00mm x 14.00mm x 22.00mm), requiring PCB layout verification. The B82721K2222U030 dimensions (18.20mm x 13.20mm x 20.40mm) are comparable to the main part and support direct substitution without layout modification.

Q: What is the significance of the inductance frequency specification?

A: Inductance values are measured at specific frequencies (10 kHz for 7448022010 and 7446222003; 100 kHz for B82721K2222U030). These measurements reflect component behavior at the specified frequency. Circuit design must account for frequency-dependent inductance characteristics when selecting substitutes.

Q: Can I use a substitute with higher current rating?

A: Yes. The B82721K2222U030 (2.2A rating) can be used in applications designed for the 7448022010 (2A rating). Higher current rating provides additional design margin and does not create compatibility issues. Lower current rating substitutes are not acceptable.