5900-271 Equivalent & Substitute Parts Reference

Part Overview

The Bourns 5900-271 is a 270 µH unshielded drum core wirewound inductor rated for 1.4 A with a maximum DC resistance of 210 mOhm. 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 5900-271 carries an obsolete product status, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Inductance	270 µH
Inductance Tolerance	±10%
Current Rating	1.4 A
DC Resistance (DCR)	210 mOhm Max
Core Type	Ferrite Drum Core
Shielding	Unshielded
Mounting Type	Through Hole
Package	Axial
Operating Temperature Range	-55°C to 105°C
Test Frequency	1 kHz

Substitute Part Grouping Explanation

Substitute parts for the 5900-271 are qualified based on the following electrical and mechanical parameters:

Inductance Value: 270 µH (exact match required)
Inductance Tolerance: ±10% (matching tolerance specification)
Current Rating: Minimum 1.4 A (equal or greater acceptable)
DC Resistance: Maximum 210 mOhm (equal or lower acceptable)
Core Type: Ferrite drum core wirewound construction
Shielding: Unshielded configuration
Mounting Type: Through hole
Package: Axial form factor
Test Frequency: 1 kHz

The following parts meet these substitution criteria: API Delevan 4590-274K, API Delevan 4590R-274K, and Abracon AIAP-03-271K.

Parameter Comparison

Parameter	5900-271 (Bourns)	4590-274K (API Delevan)	4590R-274K (API Delevan)	AIAP-03-271K (Abracon)
Inductance	270 µH	270 µH	270 µH	270 µH
Tolerance	±10%	±10%	±10%	±10%
Current Rating	1.4 A	1.715 A	1.715 A	1.63 A
DC Resistance (Max)	210 mOhm	226 mOhm	226 mOhm	208 mOhm
Core Type	Ferrite Drum Core	Ferrite Drum Core	Ferrite Drum Core	Wirewound
Shielding	Unshielded	Unshielded	Unshielded	Unshielded
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package	Axial	Axial	Axial	Axial
Operating Temperature	-55°C to 105°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Test Frequency	1 kHz	1 kHz	1 kHz	1 kHz
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts meet the core electrical and mechanical requirements for direct replacement of the 5900-271. Selection should be based on product status and regulatory compliance:

API Delevan 4590R-274K is the preferred substitute. This part carries active product status, ROHS3 compliance, and extended operating temperature range (-55°C to 125°C). Current rating of 1.715 A exceeds the 1.4 A requirement, and DC resistance of 226 mOhm remains within acceptable limits for the application.

Abracon AIAP-03-271K is an alternative substitute with active product status and ROHS3 compliance. This part offers the lowest DC resistance at 208 mOhm and current rating of 1.63 A. Operating temperature range extends to 125°C.

API Delevan 4590-274K is functionally equivalent to 4590R-274K but carries non-compliant RoHS status. This part is suitable only for applications without RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can the 4590-274K and 4590R-274K be used interchangeably? A: Both parts share identical electrical specifications (270 µH, 1.715 A, 226 mOhm DCR) and mechanical form factors. The primary difference is RoHS compliance status. The 4590R-274K is ROHS3 compliant while the 4590-274K is not. Selection depends on regulatory requirements for your application.

Q: What is the impact of the higher DC resistance in the substitute parts? A: The 4590-274K and 4590R-274K have 226 mOhm maximum DCR compared to 210 mOhm for the 5900-271. This 16 mOhm increase represents approximately 7.6% higher resistance and will result in proportionally increased power dissipation in the inductor. Verify thermal performance in your specific circuit application.

Q: Are all substitute parts pin-compatible with the 5900-271? A: All substitute parts use through-hole axial mounting with dimensions within 0.006" of the original part. Physical fit in existing PCB layouts is compatible. Verify lead spacing and hole diameter specifications for your specific board design.

Q: Which substitute part offers the best thermal performance? A: The AIAP-03-271K provides the lowest DC resistance at 208 mOhm, resulting in the lowest resistive heating. All three substitutes support extended operating temperature to 125°C compared to the original 105°C maximum.

Q: Are there compliance considerations for substitute selection? A: The 4590R-274K and AIAP-03-271K are ROHS3 compliant. The original 5900-271 and 4590-274K are non-compliant. For new designs or applications with RoHS requirements, select either the 4590R-274K or AIAP-03-271K.

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