744764156 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744764156 is a 56 µH unshielded drum core wirewound inductor rated for 55 mA with 8Ω maximum DC resistance in a 1210 (3225 Metric) surface mount package. This component is designed for applications requiring fixed inductance filtering, impedance matching, and energy storage in compact form factors. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across alternative manufacturers while preserving critical functional parameters.

Substiute Parts

744764156

Würth ElektronikIn Stock: 1987744764156 Datasheet

Current PartRFQ

CMH322522-560KL

Bourns Inc.In Stock: 11795CMH322522-560KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744764156 is determined by strict equivalence across the following parameters:

• Inductance value: 56 µH ±10%
• Current rating: 55 mA minimum
• DC resistance: 8Ω maximum
• Core material: Ferrite
• Package form factor: 1210 (3225 Metric) surface mount
• Physical dimensions: 3.20mm L × 2.50mm W × 2.40mm H (seated)
• Regulatory compliance: RoHS3 compliant

The Bourns CMH322522-560KL meets all electrical and mechanical substitution criteria. The primary distinction is shielding configuration: the substitute part features shielded construction versus the unshielded design of the primary part. This difference does not affect substitution eligibility when electromagnetic isolation is not a circuit requirement.

Parameter Comparison

Engineering Selection Recommendations

Both the 744764156 and CMH322522-560KL are active production components with full RoHS3 compliance and unlimited moisture sensitivity ratings. Selection between these parts depends on circuit-specific requirements:

The 744764156 (unshielded) is appropriate for applications where electromagnetic field coupling to adjacent components is acceptable or beneficial. The CMH322522-560KL (shielded) provides electromagnetic containment suitable for noise-sensitive circuits or densely populated PCB layouts. Both parts maintain identical electrical performance across inductance, current rating, DC resistance, and quality factor specifications. The Bourns substitute offers an extended operating temperature range (-55°C to 125°C versus -40°C to 105°C), providing additional thermal margin in extreme environment applications.

Frequently Asked Questions (FAQ)

Q: Can the CMH322522-560KL directly replace the 744764156 in existing designs?

A: Yes, provided the circuit does not depend on the unshielded electromagnetic field characteristic of the original part. Electrical performance is equivalent across all specified parameters. Physical footprint and mounting compatibility are identical.

Q: What is the functional difference between shielded and unshielded inductors?

A: Shielded inductors contain the magnetic field within the component structure, reducing electromagnetic interference with surrounding circuitry. Unshielded inductors allow the magnetic field to extend into the surrounding space. Selection depends on circuit layout and EMI requirements.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity ratings. No compliance or certification differences exist between the two options.

Q: Does the extended temperature range of the Bourns part affect substitution suitability?

A: The extended operating range (-55°C to 125°C versus -40°C to 105°C) does not prevent substitution. It provides additional thermal margin and may be advantageous in extreme environment applications.

Q: Are the physical dimensions and package footprints identical?

A: Yes. Both parts use the 1210 (3225 Metric) package with identical dimensions: 3.20mm length × 2.50mm width × 2.40mm seated height. PCB footprints are interchangeable.

Q: What is the self-resonant frequency difference between these parts?

A: The 744764156 has a self-resonant frequency of 14 MHz, while the CMH322522-560KL is rated at 12 MHz. This difference reflects the shielding structure and does not affect substitution eligibility for standard filtering and impedance matching applications.