Würth Elektronik 744764018 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744764018 is a 1.8 µH unshielded drum core wirewound inductor rated for 350 mA with a maximum DC resistance of 900mOhm. This surface mount component in 1210 (3225 Metric) package is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production and ROHS3 compliant. Substitute parts may be required due to inventory availability, lead time constraints, or specific application requirements such as shielding characteristics or operating temperature ranges.

Substiute Parts

744764018

Würth ElektronikIn Stock: 20340744764018 Datasheet

Current PartRFQ

CMH322522-1R8KL

Bourns Inc.In Stock: 2962CMH322522-1R8KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns Inc. CMH322522-1R8KL qualifies as a direct substitute based on the following matching electrical and mechanical parameters:

• Inductance value: 1.8 µH (identical)
• Tolerance: ±10% (identical)
• Current rating: 350 mA (identical)
• DC resistance: 900mOhm Max (identical)
• Package / Case: 1210 (3225 Metric) (identical)
• Mounting type: Surface Mount (identical)
• Core type: Drum Core, Wirewound (identical)
• Core material: Ferrite (identical)
• Inductance test frequency: 7.96 MHz (identical)
• Physical dimensions: 0.126" L x 0.098" W, 0.094" Max height (identical)

The primary difference is shielding configuration: the Würth part is unshielded while the Bourns substitute is shielded. This distinction affects electromagnetic interference characteristics and self-resonant frequency but does not prevent functional substitution in applications where shielding is beneficial or neutral.

Parameter Comparison

Engineering Selection Recommendations

Both parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications. The Bourns CMH322522-1R8KL offers an extended operating temperature range (-55°C to 125°C versus -40°C to 105°C) and superior moisture handling with MSL 1 rating compared to MSL 3 for the Würth part. The shielded configuration of the Bourns substitute reduces electromagnetic coupling to adjacent circuit elements, making it suitable for noise-sensitive applications. Selection between these parts should be based on specific application requirements regarding shielding, temperature extremes, and moisture exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can the Bourns CMH322522-1R8KL replace the Würth Elektronik 744764018 in existing designs?

A: Yes. Both parts share identical electrical specifications (1.8 µH inductance, 350 mA current rating, 900mOhm DC resistance) and mechanical dimensions (1210 package, 3.20mm x 2.50mm x 2.40mm). The primary difference is shielding; the Bourns part is shielded while the Würth part is unshielded. This substitution is valid provided the application does not require the specific unshielded characteristics of the original design.

Q: What is the impact of shielding on circuit performance?

A: Shielding reduces electromagnetic field radiation and susceptibility to external interference. The shielded Bourns part exhibits a lower self-resonant frequency (80 MHz versus 170 MHz), which may affect high-frequency performance. Applications operating below 80 MHz will not be impacted by this difference.

Q: Are there differences in moisture sensitivity between these parts?

A: Yes. The Würth part has MSL 3 rating (168 hours maximum floor life), while the Bourns substitute has MSL 1 rating (unlimited floor life). The Bourns part is more tolerant of moisture exposure during storage and handling, reducing risk of moisture-induced failures in humid environments.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8504.50.8000. They meet equivalent regulatory requirements for commercial and industrial applications.

Q: Which part should be selected for extended temperature applications?

A: The Bourns CMH322522-1R8KL supports -55°C to 125°C operating range, compared to -40°C to 105°C for the Würth part. For applications requiring operation below -40°C or above 105°C, the Bourns substitute is the appropriate choice.