Bourns 5900-331 330µH Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 5900-331 is a 330µH unshielded drum core wirewound inductor rated for 1.2A continuous current with a maximum DC resistance of 285mOhm. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The 5900-331 carries an obsolete product status. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for legacy systems or new designs requiring compatible performance characteristics.

Key Parameters

Parameter	Value
Inductance	330µH
Current Rating	1.2A
DC Resistance (Max)	285mOhm
Tolerance	±10%
Core Type	Ferrite Drum Core
Shielding	Unshielded
Mounting Type	Through Hole Axial
Operating Temperature	-55°C to 105°C
Package Dimension	0.453" Dia × 0.900" L (11.51mm × 22.86mm)

Substitute Part Grouping Explanation

Substitution eligibility for the 5900-331 is determined by the following critical parameters:

Inductance Value: Must be 330µH ±10%
Current Rating: Minimum 1.2A continuous current capability
DC Resistance: Maximum 285mOhm to maintain circuit performance
Core Material & Type: Ferrite drum core or equivalent wirewound construction
Mounting Configuration: Through-hole axial package
Operating Temperature Range: Minimum -55°C to 105°C coverage
Test Frequency: 1kHz inductance measurement standard

Three substitute parts meet these criteria with varying performance enhancements and compliance profiles.

Parameter Comparison

Parameter	5900-331 (Main)	5900-331-RC	4590-334K	AIAP-03-331K
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	Abracon LLC
Inductance	330µH	330µH	330µH	330µH
Current Rating (Amps)	1.2A	1.2A	1.61A	1.51A
DC Resistance (Max)	285mOhm	285mOhm	257mOhm	212mOhm
Tolerance	±10%	±10%	±10%	±10%
Core Type	Ferrite Drum Core	Ferrite Drum Core	Ferrite Drum Core	Wirewound
Shielding	Unshielded	Unshielded	Unshielded	Unshielded
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Through Hole Axial	Through Hole Axial	Through Hole Axial	Through Hole Axial
Product Status	Obsolete	Active	Active	Active
RoHS Compliance	Non-compliant	RoHS3 Compliant	Non-compliant	RoHS3 Compliant
Packaging	Bulk	Tray	Bulk	Bulk
Inventory Status	1086 Pcs	3440 Pcs	656 Pcs	647 Pcs

Engineering Selection Recommendations

Direct Equivalent (Preferred for Legacy Designs)

The 5900-331-RC is the primary substitute for the obsolete 5900-331. Both parts are manufactured by Bourns Inc., share identical electrical specifications (330µH, 1.2A, 285mOhm), and maintain the same operating temperature range. The 5900-331-RC carries active product status and RoHS3 compliance, making it suitable for new production and regulatory requirements. Tray packaging provides improved handling for manufacturing environments.

Enhanced Performance Alternatives

The 4590-334K (API Delevan) and AIAP-03-331K (Abracon) offer improved electrical performance with lower DC resistance (257mOhm and 212mOhm respectively) and higher current ratings (1.61A and 1.51A). Both extend the operating temperature range to 125°C. The AIAP-03-331K additionally provides RoHS3 compliance. These alternatives are suitable when designs require enhanced thermal performance or reduced resistive losses.

Compliance Considerations

For applications requiring RoHS3 compliance, select either 5900-331-RC or AIAP-03-331K. The 4590-334K maintains RoHS non-compliant status consistent with the original 5900-331.

Frequently Asked Questions (FAQ)

Q: Can the 5900-331-RC be used as a direct replacement for the 5900-331?

A: Yes. The 5900-331-RC is electrically and mechanically identical to the 5900-331, with matching inductance (330µH), current rating (1.2A), DC resistance (285mOhm), and operating temperature range (-55°C to 105°C). The primary difference is product status (active vs. obsolete) and RoHS3 compliance.

Q: What are the advantages of using 4590-334K or AIAP-03-331K over the 5900-331-RC?

A: Both alternatives provide lower DC resistance (257mOhm and 212mOhm versus 285mOhm) and higher current ratings (1.61A and 1.51A versus 1.2A). This results in reduced power dissipation and improved thermal performance. Both extend the operating temperature range to 125°C. The AIAP-03-331K also provides RoHS3 compliance.

Q: Are there any dimensional differences between these parts?

A: All four parts maintain through-hole axial configuration with nearly identical dimensions. The 5900-331, 5900-331-RC, and 4590-334K share 0.453"-0.455" diameter and 0.900" length. The AIAP-03-331K measures 0.449" diameter × 0.902" length, representing negligible variation suitable for standard PCB footprints.

Q: Which substitute should be selected for new designs?

A: For new designs, the 5900-331-RC is the recommended primary choice due to direct equivalence and active product status. If enhanced thermal performance or lower losses are required, the AIAP-03-331K provides RoHS3 compliance with superior electrical characteristics.

Q: What is the significance of packaging differences (Tray vs. Bulk)?

A: Tray packaging (5900-331-RC) provides organized component handling and protection during manufacturing processes. Bulk packaging (4590-334K, AIAP-03-331K) is suitable for applications with lower volume requirements or custom packaging workflows.

Q: Are all substitutes suitable for the same circuit applications?

A: Yes, all substitutes meet or exceed the minimum electrical requirements (330µH inductance, 1.2A current rating, 285mOhm maximum resistance) and maintain the same unshielded ferrite drum core construction. Circuit performance remains consistent across all four parts.

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