744772331 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744772331 is a 330 µH unshielded drum core wirewound inductor rated for 510 mA continuous current with a maximum DC resistance of 700 mOhm. This through-hole radial component operates across -40°C to 125°C and is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified tolerance ranges.

Substiute Parts

744772331

Würth ElektronikIn Stock: 1935744772331 Datasheet

Current PartRFQ

RL895-331K-RC

Bourns Inc.In Stock: 1849RL895-331K-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744772331 is determined by the following critical parameters:

• Inductance value must be 330 µH with ±10% tolerance
• Current rating must support minimum 510 mA continuous operation
• DC resistance must not exceed 700 mOhm maximum
• Core material must be ferrite, unshielded drum core construction
• Mounting configuration must be through-hole radial, vertical cylinder orientation
• Package dimensions must accommodate 0.307" (7.80mm) diameter specification
• RoHS3 compliance and REACH unaffected status required

The Bourns RL895-331K-RC meets these substitution criteria with equivalent inductance, current rating, and core construction. Variations in saturation current, self-resonant frequency, and operating temperature range do not preclude substitution when the primary electrical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Both the 744772331 and RL895-331K-RC are active production components with ROHS3 compliance and REACH unaffected status. The Würth Elektronik part provides a wider operating temperature range (-40°C to 125°C) compared to the Bourns alternative (-30°C to 100°C). The Bourns RL895-331K-RC offers lower DC resistance (610 mOhm versus 700 mOhm maximum), which may reduce power dissipation in current-limited applications. Selection between these parts should be based on specific thermal and resistance requirements of the target application, with consideration for the operating temperature envelope and packaging availability.

Frequently Asked Questions (FAQ)

Q: Can the RL895-331K-RC replace the 744772331 in all applications?

A: The RL895-331K-RC is electrically and mechanically compatible for applications operating within -30°C to 100°C. Applications requiring operation below -30°C or above 100°C must use the 744772331 due to its extended temperature range.

Q: What is the significance of the DC resistance difference between these parts?

A: The RL895-331K-RC has a maximum DC resistance of 610 mOhm compared to 744772331 at 700 mOhm. Lower resistance reduces I²R power dissipation. Both values are within acceptable ranges for 510 mA rated current applications.

Q: Are the physical dimensions identical?

A: Both parts share the same radial diameter of 0.307" (7.80mm). The 744772331 has a seated height of 0.394" (10.00mm) while the RL895-331K-RC measures 0.374" (9.50mm). This 0.020" difference may affect PCB layout in space-constrained designs.

Q: Do both parts meet regulatory compliance requirements?

A: Yes. Both the 744772331 and RL895-331K-RC are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What packaging formats are available?

A: The 744772331 is supplied in Tray packaging, while the RL895-331K-RC is supplied in Bulk packaging. Packaging format selection depends on assembly process requirements and inventory management practices.