Bourns 5900-330 33µH Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 5900-330 is a 33µH unshielded drum core wirewound inductor rated for 3.4A continuous current with a maximum DC resistance of 37mOhm. This through-hole axial component operates across the temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance filtering and energy storage.

The 5900-330 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems.

Substiute Parts

5900-330

Bourns Inc.In Stock: 12305900-330 Datasheet

Current PartRFQ

5900-330-RC

Bourns Inc.In Stock: 17635900-330-RC Datasheet

DirectRFQ

4590-333K

API Delevan Inc.In Stock: 10904590-333K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5900-330 are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalent (Packaging Variant): The 5900-330-RC is a direct functional equivalent manufactured by Bourns Inc. It maintains identical electrical specifications: 33µH inductance, ±10% tolerance, 3.4A current rating, 37mOhm maximum DCR, and 4.6A saturation current. The primary distinction is packaging format (tray versus bulk) and product status (active versus obsolete). This part is RoHS3 compliant, whereas the original 5900-330 is RoHS non-compliant.

Similar Substitute (Performance Enhancement): The API Delevan 4590-333K shares the same inductance value (33µH) and core type (ferrite, unshielded) but offers improved electrical performance characteristics. It provides higher current rating (4.87A versus 3.4A) and lower DC resistance (28mOhm versus 37mOhm). Physical dimensions are nearly identical (0.455" Dia x 0.900" L). The operating temperature range extends to 125°C (versus 105°C). This part is active and available in bulk packaging.

Substitution eligibility is determined by matching inductance value, tolerance, core material, shielding configuration, mounting type, and package style within acceptable mechanical envelope constraints.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (5900-330-RC): The 5900-330-RC is the primary substitute for the obsolete 5900-330. Both parts are manufactured by Bourns Inc. and maintain identical electrical specifications. The 5900-330-RC is currently in active production status with confirmed inventory availability (1704 pcs). This part achieves RoHS3 compliance, making it suitable for applications subject to environmental regulations. Selection of the 5900-330-RC eliminates obsolescence risk while preserving all original electrical performance characteristics.

For Performance-Enhanced Substitution (4590-333K): The API Delevan 4590-333K provides an alternative when design margins permit utilization of enhanced electrical performance. This part delivers higher continuous current capacity (4.87A versus 3.4A) and reduced DC resistance (28mOhm versus 37mOhm), resulting in lower power dissipation. The extended operating temperature range to 125°C accommodates higher ambient or self-heating conditions. Physical dimensions remain compatible with standard through-hole PCB layouts. The 4590-333K is active and available in bulk packaging. However, this part does not achieve RoHS3 compliance.

Selection between direct and performance-enhanced substitutes depends on regulatory requirements, thermal design margins, and supply chain constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the 5900-330-RC be used as a direct replacement for the 5900-330?

A: Yes. The 5900-330-RC is electrically and mechanically identical to the 5900-330. Both parts maintain 33µH inductance, ±10% tolerance, 3.4A current rating, and 37mOhm maximum DCR. The primary differences are product status (active versus obsolete) and RoHS compliance (RoHS3 versus non-compliant). The 5900-330-RC is the recommended substitute for obsolescence mitigation.

Q: What are the key differences between the 5900-330 and the 4590-333K?

A: Both parts share identical inductance (33µH), tolerance (±10%), core material (ferrite), and shielding (unshielded). The 4590-333K offers higher current rating (4.87A versus 3.4A), lower DC resistance (28mOhm versus 37mOhm), and extended temperature range (-55°C to 125°C versus -55°C to 105°C). Physical dimensions are nearly identical (0.455" versus 0.453" diameter). The 4590-333K is manufactured by API Delevan Inc. rather than Bourns Inc.

Q: Are there mechanical compatibility concerns when substituting the 4590-333K?

A: Mechanical compatibility is maintained. Both the 5900-330 and 4590-333K are through-hole axial components with identical length (0.900") and nearly identical diameter (0.453" versus 0.455"). The 0.002" diameter difference is negligible for standard PCB hole tolerances. Both parts fit standard axial component footprints without modification.

Q: Which substitute part should be selected for new designs?

A: For new designs, the 5900-330-RC is the primary recommendation. It is manufactured by the original supplier (Bourns Inc.), maintains all original specifications, and achieves RoHS3 compliance. The part is in active production with confirmed availability. The 4590-333K may be considered if design requirements include higher current capacity or extended temperature operation, provided RoHS non-compliance is acceptable for the application.

Q: What is the impact of DC resistance differences between these parts?

A: The 4590-333K exhibits 28mOhm maximum DCR compared to 37mOhm for the 5900-330. At the 3.4A design current, this represents a power dissipation reduction of approximately 0.41mW (from 0.428W to 0.322W). This difference is significant in thermally constrained applications but negligible in most general-purpose filtering circuits.

Q: Are packaging format differences significant for component selection?

A: Packaging format (tray versus bulk) affects supply chain logistics and handling procedures but does not impact electrical or mechanical performance. The 5900-330-RC is supplied in tray packaging, while the 4590-333K is supplied in bulk packaging. Selection should consider procurement volume, storage requirements, and assembly process compatibility.