Würth Elektronik 744743471 470µH Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744743471 is a 470µH unshielded drum core wirewound inductor rated for 580mA continuous current with a maximum DC resistance of 1.5Ohm. This through-hole radial component operates across the temperature range of -40°C to 125°C and is designed for applications requiring stable inductance at 1kHz test frequency. The part is active in production and ROHS3 compliant, making it suitable for modern electronic assemblies where equivalent alternatives may be required due to inventory constraints, lead time considerations, or design optimization needs.

Substiute Parts

744743471

Würth ElektronikIn Stock: 2233744743471 Datasheet

Current PartRFQ

RLB9012-471KL

Bourns Inc.In Stock: 6713RLB9012-471KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Würth Elektronik 744743471 is determined by the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 470µH (±10% tolerance acceptable)
• Current rating: minimum 580mA continuous
• DC resistance: maximum 1.5Ohm
• Core material: Ferrite
• Mounting configuration: Through hole, radial vertical cylinder
• Shielding: Unshielded
• Operating temperature range: minimum -40°C to 125°C coverage

The Bourns RLB9012-471KL meets these substitution criteria with equivalent inductance, superior current rating (680mA), lower DC resistance (1.1Ohm), and compatible through-hole radial package configuration. Both parts maintain ferrite drum core construction, unshielded design, and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The Bourns RLB9012-471KL serves as a direct substitute for the Würth Elektronik 744743471 based on matched inductance specifications, compatible through-hole radial package geometry, and equivalent ferrite core construction. The Bourns component provides performance advantages including higher current rating capacity (680mA versus 580mA) and reduced DC resistance (1.1Ohm versus 1.5Ohm maximum), resulting in lower power dissipation in equivalent circuit applications.

Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for modern electronics manufacturing. The Bourns part extends the operating temperature range to -55°C, providing additional thermal margin for applications requiring extended low-temperature performance.

Physical package dimensions differ slightly: the Bourns RLB9012-471KL measures 0.354" diameter by 0.480" height compared to the Würth part at 0.335" diameter by 0.236" height. PCB layout verification is necessary to confirm mechanical fit within the available mounting space.

Frequently Asked Questions (FAQ)

Q: Can the Bourns RLB9012-471KL replace the Würth Elektronik 744743471 in existing designs?

A: Yes, the Bourns component is electrically and mechanically compatible as a substitute. Both parts provide 470µH inductance with ±10% tolerance, through-hole radial mounting, and ferrite drum core construction. Verify PCB layout accommodates the slightly larger Bourns package dimensions (0.354" diameter, 0.480" height versus 0.335" diameter, 0.236" height).

Q: What are the key differences between these two inductors?

A: The primary differences are current rating (Bourns 680mA versus Würth 580mA), DC resistance (Bourns 1.1Ohm maximum versus Würth 1.5Ohm maximum), and operating temperature range (Bourns -55°C to 125°C versus Würth -40°C to 125°C). The Bourns component offers superior electrical performance with lower losses and higher current capacity.

Q: Are both parts compliant with modern regulatory standards?

A: Yes, both the Würth Elektronik 744743471 and Bourns RLB9012-471KL are ROHS3 compliant and REACH unaffected, meeting current electronics manufacturing regulations.

Q: What is the significance of the self-resonant frequency difference?

A: The Würth part exhibits 2.1MHz self-resonant frequency while the Bourns part measures 1.9MHz. This minor difference reflects normal manufacturing variation in ferrite core inductors and does not affect substitution suitability for standard filtering and energy storage applications operating well below these frequencies.

Q: Should I consider the DC resistance difference in my circuit design?

A: The Bourns component's lower DC resistance (1.1Ohm maximum versus 1.5Ohm maximum) reduces power dissipation and heat generation. For current-limited applications or designs operating near the 580mA rating, the Bourns substitute provides improved thermal performance and efficiency margins.