Bourns 5900-182 Fixed Inductor: Equivalent & Substitute Parts

Part Overview

The Bourns 5900-182 is a 1.8 mH unshielded drum core wirewound inductor rated for 530 mA continuous current with 1.5 Ohm maximum DC resistance. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. The part operates across the industrial temperature range of -55°C to 105°C and is mounted through-hole in axial configuration.

Key Parameters

Parameter	Value
Inductance	1.8 mH
Inductance Tolerance	±10%
Current Rating	530 mA
DC Resistance (Max)	1.5 Ohm
Core Type	Ferrite Drum Core
Shielding	Unshielded
Mounting Type	Through Hole Axial
Operating Temperature	-55°C to 105°C
Inductance Test Frequency	1 kHz
Physical Dimensions	0.453" Dia × 0.900" L (11.51 mm × 22.86 mm)

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 5900-182 is determined by the following critical parameters:

Inductance Value: Must be 1.8 mH ±10%
DC Resistance: Must not exceed 1.5 Ohm maximum
Current Rating: Must support minimum 530 mA continuous operation
Core Type: Ferrite drum core construction
Shielding: Unshielded configuration
Mounting: Through-hole axial package
Inductance Test Frequency: 1 kHz measurement standard
Physical Compatibility: Dimensions must accommodate 0.453" diameter and 0.900" length envelope

The following parts meet these substitution criteria:

API Delevan 4590-185K: Active product with enhanced current rating (665 mA) and extended temperature range (-55°C to 125°C)
API Delevan 4590R-185K: Active product with RoHS3 compliance, identical electrical specifications to 4590-185K
Abracon AIAP-03-182K: Active product with RoHS3 compliance and higher current rating (640 mA)

Parameter Comparison

Parameter	Bourns 5900-182	API Delevan 4590-185K	API Delevan 4590R-185K	Abracon AIAP-03-182K
Inductance	1.8 mH	1.8 mH	1.8 mH	1.8 mH
Inductance Tolerance	±10%	±10%	±10%	±10%
Current Rating (Amps)	530 mA	665 mA	665 mA	640 mA
DC Resistance (Max)	1.5 Ohm	1.5 Ohm	1.5 Ohm	1.56 Ohm
Core Type	Ferrite Drum Core	Ferrite Drum Core	Ferrite Drum Core	Wirewound
Shielding	Unshielded	Unshielded	Unshielded	Unshielded
Operating Temperature Range	-55°C to 105°C	-55°C to 125°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
Inductance Test Frequency	1 kHz	1 kHz	1 kHz	1 kHz
Physical Dimensions	0.453" Dia × 0.900" L (11.51 mm × 22.86 mm)	0.455" Dia × 0.900" L (11.55 mm × 22.86 mm)	0.455" Dia × 0.900" L (11.55 mm × 22.86 mm)	0.449" Dia × 0.902" L (11.40 mm × 22.90 mm)
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	Non-compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

API Delevan 4590R-185K is the preferred substitute for new designs and production transitions. This part maintains electrical equivalence to the Bourns 5900-182 while offering RoHS3 compliance and active product status. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin compared to the original specification.

API Delevan 4590-185K serves as an alternative active substitute with identical electrical performance to the 4590R-185K variant but without RoHS3 compliance certification.

Abracon AIAP-03-182K is suitable for applications where RoHS3 compliance is required. DC resistance tolerance is slightly higher at 1.56 Ohm maximum, which remains within acceptable substitution parameters for most circuit applications.

All three substitutes exceed the original 530 mA current rating, providing design margin for thermal and reliability considerations.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 4590-185K directly replace the Bourns 5900-182 in existing designs?

A: Yes. The 4590-185K maintains the same inductance value (1.8 mH ±10%), DC resistance (1.5 Ohm max), and through-hole axial mounting configuration. The higher current rating (665 mA vs. 530 mA) and extended temperature range provide additional performance margin.

Q: What is the difference between API Delevan 4590-185K and 4590R-185K?

A: Both parts have identical electrical specifications and physical dimensions. The 4590R-185K variant includes RoHS3 compliance certification, while the 4590-185K does not. Select 4590R-185K for applications requiring RoHS compliance documentation.

Q: Is the Abracon AIAP-03-182K compatible with the original Bourns 5900-182 footprint?

A: Physical dimensions are within acceptable tolerance. The AIAP-03-182K measures 0.449" diameter × 0.902" length compared to the original 0.453" × 0.900". These minor variations are compatible with standard through-hole PCB layouts. DC resistance is 1.56 Ohm maximum, which is 0.06 Ohm higher than the original specification but remains functionally equivalent for most applications.

Q: Why is the Bourns 5900-182 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitutes from API Delevan and Abracon provide equivalent functionality with current manufacturing support and compliance certifications.

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

A: API Delevan 4590R-185K is recommended for new designs due to active product status, RoHS3 compliance, and extended operating temperature range. Abracon AIAP-03-182K is an alternative where RoHS3 compliance is a primary requirement.

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