7447721047 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7447721047 is a 4.7 mH unshielded drum core wirewound inductor rated for 200 mA with a maximum DC resistance of 15 Ohm. This through-hole component operates across -40°C to 125°C and is designed for applications requiring fixed inductance in radial vertical cylinder configuration. The part is active in production and ROHS3 compliant. Substitute parts are identified when equivalent inductance values, core materials, and mounting types are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

7447721047

Würth ElektronikIn Stock: 9517447721047 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 7447721047 is determined by the following critical parameters:

• Inductance value: 4.7 mH (exact match required)
• Core type: Ferrite drum core, unshielded
• Mounting configuration: Through-hole, radial vertical cylinder
• Package compatibility: Radial, vertical cylinder (open)
• Compliance: ROHS3 and REACH unaffected status

The substitute part RL875-472K-RC from Bourns Inc. meets these core substitution criteria. Variations in current rating, DC resistance, and operating temperature range are acceptable within the allowed electrical and mechanical parameters for this inductor category, provided the primary inductance specification and physical form factor remain compatible with the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the 7447721047 and RL875-472K-RC are active production components with ROHS3 compliance and REACH unaffected status. The primary selection criterion is current rating compatibility: the 7447721047 supports 200 mA operation, while the RL875-472K-RC is rated for 120 mA. Selection of the substitute part is appropriate only when circuit current requirements do not exceed 120 mA. The operating temperature range of the RL875-472K-RC extends to 105°C maximum, compared to 125°C for the primary part; applications requiring operation above 105°C require the 7447721047. Both components share identical physical dimensions and mounting configuration, ensuring mechanical interchangeability in through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the RL875-472K-RC replace the 7447721047 in all applications?

A: No. The RL875-472K-RC is suitable only when circuit current requirements do not exceed 120 mA and operating temperature does not exceed 105°C. The 7447721047 supports higher current (200 mA) and temperature (125°C) ratings.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both components have a diameter of 0.307" (7.80mm) and use radial vertical cylinder (open) package configuration, ensuring mechanical compatibility in through-hole PCB designs.

Q: What is the inductance tolerance difference between these parts?

A: The 7447721047 has ±5% tolerance, while the RL875-472K-RC has ±10% tolerance. Applications requiring tighter inductance accuracy should use the 7447721047.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both the 7447721047 and RL875-472K-RC are ROHS3 compliant and REACH unaffected.

Q: What is the DC resistance difference?

A: The 7447721047 has a maximum DC resistance of 15 Ohm, while the RL875-472K-RC is 16.7 Ohm. This difference may affect power dissipation in high-current applications.