Würth Elektronik 744731472 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744731472 is a 4.7 mH shielded drum core wirewound inductor rated for 160 mA continuous current with a maximum DC resistance of 11.4 Ohm. This through-hole radial component operates across the temperature range of -40°C to 125°C and is designed for applications requiring electromagnetic shielding in compact form factors. The part is currently active in production and ROHS3 compliant. Substitute parts may be required due to inventory constraints, regional availability, or specific application requirements where alternative electrical characteristics are acceptable within design tolerances.

Substiute Parts

744731472

Würth ElektronikIn Stock: 859744731472 Datasheet

Current PartRFQ

RL875-472K-RC

Bourns Inc.In Stock: 2010RL875-472K-RC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744731472 is determined by the following critical parameters:

Inductance value must match at 4.7 mH with ±10% tolerance. Core material must remain ferrite-based drum core construction. Mounting type must be through-hole with radial vertical cylinder package orientation. Physical dimensions (0.307" diameter, 0.295" maximum height) must be compatible with PCB layout constraints. Operating temperature range must support the application's thermal requirements. RoHS3 compliance and REACH unaffected status must be maintained.

The Bourns RL875-472K-RC qualifies as a substitute based on matching inductance value, ferrite core material, through-hole radial mounting, identical physical dimensions, and equivalent compliance certifications. Differences in current rating, DC resistance, shielding configuration, and operating temperature ceiling represent trade-offs that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744731472 and Bourns RL875-472K-RC maintain active production status and full compliance with ROHS3 and REACH requirements, ensuring regulatory acceptability for new designs and manufacturing.

Selection between these parts depends on application-specific constraints. The 744731472 is preferred where shielding is required to minimize electromagnetic interference, where the 160 mA current rating is necessary, where the lower 11.4 Ohm DC resistance is critical for power efficiency, or where the extended 125°C operating temperature ceiling is required. The RL875-472K-RC is suitable where shielding is not required, where circuit current demands do not exceed 120 mA, where higher DC resistance is acceptable, and where the 105°C maximum operating temperature is sufficient.

Frequently Asked Questions (FAQ)

Q: Can the Bourns RL875-472K-RC directly replace the Würth Elektronik 744731472 in all applications?

A: Direct replacement is possible only when the application does not require electromagnetic shielding, when circuit current remains below 120 mA, when the higher 16.7 Ohm DC resistance does not compromise power efficiency or voltage drop requirements, and when the operating environment does not exceed 105°C. The identical inductance value, tolerance, core material, and physical dimensions ensure mechanical and electrical compatibility within these constraints.

Q: What is the impact of the shielding difference between these parts?

A: The 744731472 features shielding that reduces radiated electromagnetic interference and susceptibility to external fields. The RL875-472K-RC is unshielded, making it suitable for applications where EMI is not a concern but potentially unsuitable for noise-sensitive circuits or environments with high electromagnetic activity.

Q: How does the current rating difference affect substitution?

A: The 744731472 is rated for 160 mA continuous current while the RL875-472K-RC is rated for 120 mA. Substitution is valid only when the circuit's maximum sustained current does not exceed 120 mA. Operating the RL875-472K-RC above its current rating may result in excessive heating and reduced component lifespan.

Q: Are there temperature-related constraints for substitution?

A: The 744731472 operates to 125°C while the RL875-472K-RC operates to 105°C. Applications requiring operation above 105°C must use the 744731472. For applications with maximum operating temperatures at or below 105°C, both parts are thermally compatible.

Q: Do the physical dimensions differ between these parts?

A: No. Both parts share identical physical dimensions of 0.307" diameter and 0.295" maximum seated height, ensuring PCB layout compatibility and mechanical interchangeability in through-hole applications.

Q: What is the significance of the different self-resonant frequencies?

A: The 744731472 has a self-resonant frequency of 800 kHz while the RL875-472K-RC is 1 MHz. This difference may affect high-frequency circuit behavior. Applications operating near or above these frequencies should verify that the substitute part's resonant characteristics remain acceptable for the intended frequency range.