744766239 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744766239 is a 390 µH unshielded drum core wirewound inductor rated for 80 mA with a maximum DC resistance of 18Ohm, packaged in the 1812 (4532 Metric) surface mount form factor. This component is classified as Active product status and is RoHS3 compliant. Equivalent parts are identified when they maintain identical electrical specifications and mechanical compatibility within the same package footprint, ensuring direct substitution capability in circuit designs.

Substiute Parts

744766239

Würth ElektronikIn Stock: 1575744766239 Datasheet

Current PartRFQ

CM453232-391KL

Bourns Inc.In Stock: 2800CM453232-391KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns Inc. CM453232-391KL qualifies as a direct equivalent to the Würth Elektronik 744766239 based on the following substitution criteria:

Electrical Parameters Match:

• Inductance: 390 µH (identical)
• Inductance Tolerance: ±10% (identical)
• Current Rating: 80 mA (identical)
• DC Resistance: 18Ohm Max (identical)
• Q @ Frequency: 40 @ 796kHz (identical)
• Inductance Frequency Test: 796 kHz (identical)

Mechanical Parameters Match:

• Package / Case: 1812 (4532 Metric) (identical)
• Mounting Type: Surface Mount (identical)
• Physical Dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm) (identical)

Compliance & Status:

• Product Status: Active (both)
• RoHS Status: ROHS3 Compliant (both)
• MSL Rating: 1 (Unlimited) (both)
• REACH Status: REACH Unaffected (both)

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744766239 and Bourns CM453232-391KL are Active products with ROHS3 compliance and REACH Unaffected status, qualifying them for equivalent use in applications requiring 390 µH inductance at 80 mA. The Bourns substitute offers an extended operating temperature range to 125°C compared to the Würth part's 105°C maximum, providing additional thermal margin in high-temperature environments. The Bourns part exhibits a slightly lower seated height (3.40mm vs 3.60mm), which may provide marginal benefits in space-constrained PCB layouts. Both components maintain identical electrical performance at the test frequency of 796 kHz and are packaged in the standard 1812 (4532 Metric) surface mount form factor.

Frequently Asked Questions (FAQ)

Q: Can the Bourns CM453232-391KL directly replace the Würth Elektronik 744766239 in existing designs?

A: Yes. Both components share identical inductance (390 µH), current rating (80 mA), DC resistance (18Ohm Max), and package footprint (1812 / 4532 Metric). Electrical performance at 796 kHz is equivalent. Direct PCB substitution is supported.

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

A: The Würth part specifies 4.6MHz while the Bourns part specifies 3MHz. Both values fall within acceptable ranges for typical inductor applications and do not prevent substitution in standard circuit designs.

Q: Does the height difference affect PCB assembly?

A: The Bourns part is 0.2mm shorter in seated height (3.40mm vs 3.60mm). This minor difference is within standard PCB assembly tolerances and does not impact component placement or soldering processes for the 1812 package.

Q: Are both parts suitable for high-temperature applications?

A: The Bourns CM453232-391KL supports operation to 125°C, while the Würth part is rated to 105°C. For applications requiring sustained operation above 105°C, the Bourns substitute provides extended thermal capability.

Q: What is the moisture sensitivity level for these inductors?

A: Both components carry MSL Rating 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.