RL855-331K-RC Equivalent & Substitute Parts

Part Overview

The RL855-331K-RC is a 330 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 440 mA maximum current with 1.47Ohm DC resistance. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -30°C to 100°C and meets ROHS3 compliance requirements.

Substiute Parts

RL855-331K-RC

Bourns Inc.In Stock: 1195RL855-331K-RC Datasheet

Current PartRFQ

768772331

Würth ElektronikIn Stock: 1124768772331 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RL855-331K-RC is determined by the following critical parameters:

• Inductance Value: Must be 330 µH with ±10% tolerance
• Core Type & Shielding: Ferrite drum core, unshielded construction
• Mounting Configuration: Through hole, radial vertical cylinder package
• Physical Dimensions: 0.307" diameter (7.80mm) with compatible height
• Electrical Performance: Current rating and DC resistance must support the application requirements
• Compliance: ROHS3 compliance and regulatory alignment (REACH, ECCN)

The substitute part 768772331 (Würth Elektronik WE-TI HV series) meets these core substitution criteria with identical inductance, core type, shielding, mounting style, and physical diameter. Variations in current rating, DC resistance, and operating temperature range reflect design improvements in the substitute part.

Parameter Comparison

Engineering Selection Recommendations

The 768772331 (Würth Elektronik WE-TI HV) qualifies as a direct substitute for the obsolete RL855-331K-RC based on matching inductance value, core type, shielding configuration, mounting style, and physical diameter. Both components maintain ROHS3 compliance and REACH unaffected status.

The substitute part provides enhanced electrical performance with higher current rating (700 mA vs. 440 mA) and significantly lower DC resistance (700mOhm vs. 1.47Ohm), resulting in reduced power dissipation. The extended operating temperature range (-40°C to 125°C vs. -30°C to 100°C) offers broader thermal operating margins.

The primary design consideration is the increased height of the substitute part (0.394" vs. 0.217"), which must be verified for compatibility with existing PCB layouts and mechanical clearances. Active product status of the substitute part ensures ongoing availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 768772331 be used as a direct replacement for the RL855-331K-RC?

A: Yes, the 768772331 meets the core substitution criteria: identical 330 µH inductance with ±10% tolerance, matching ferrite drum core unshielded construction, through-hole radial vertical cylinder package, and 0.307" (7.80mm) diameter. Physical height must be verified for PCB layout compatibility.

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

A: The substitute part offers improved electrical performance with 700 mA current rating versus 440 mA, and 700mOhm DC resistance versus 1.47Ohm. Operating temperature range extends to -40°C to 125°C. The mounted height increases from 5.50mm to 10.00mm.

Q: Are there compliance or regulatory differences?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. No regulatory differences exist between the two components.

Q: What should be verified before implementing this substitution?

A: Verify PCB layout clearance for the increased component height (10.00mm vs. 5.50mm). Confirm that the lower DC resistance and higher current rating are compatible with circuit design parameters.

Q: Is the substitute part currently available?

A: Yes, the 768772331 is classified as active product status with documented inventory availability, ensuring supply chain continuity compared to the obsolete RL855-331K-RC.