Bourns 5900-270 27µH Inductor: Equivalent & Substitute Parts

Part Overview

The Bourns 5900-270 is a 27 µH unshielded drum core wirewound inductor rated for 3.6 A continuous current with a maximum DC resistance of 32 mOhm. This through-hole axial component operates across the temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The 5900-270 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

5900-270

Bourns Inc.In Stock: 8525900-270 Datasheet

Current PartRFQ

4590-273K

API Delevan Inc.In Stock: 9454590-273K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 5900-270 is determined by the following critical parameters:

• Inductance Value: Must be 27 µH with ±10% tolerance
• Core Type & Shielding: Ferrite core, unshielded construction
• Mounting & Package: Through-hole axial configuration
• Current Handling: Minimum 3.6 A continuous rating
• DC Resistance: Maximum 32 mOhm to ensure equivalent performance characteristics
• Temperature Range: Operating range must encompass or exceed -55°C to 105°C
• Test Frequency: Inductance measured at 1 kHz

The API Delevan 4590-273K meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 4590-273K is a direct substitute for the Bourns 5900-270 based on the following factors:

Electrical Compatibility: Both components provide 27 µH inductance at ±10% tolerance with identical test frequency. The 4590-273K exhibits superior current handling (5.15 A vs. 3.6 A) and lower DC resistance (25 mOhm vs. 32 mOhm), providing enhanced performance margins in the same electrical specification class.

Mechanical Compatibility: Axial through-hole package dimensions are virtually identical (0.455" vs. 0.453" diameter; both 0.900" length), ensuring PCB footprint compatibility without layout modifications.

Thermal Performance: The 4590-273K operates across -55°C to 125°C, exceeding the original -55°C to 105°C range and providing broader environmental coverage.

Supply Status: The 4590-273K is active production, addressing the obsolescence of the 5900-270 and ensuring long-term availability.

Compliance: Both components share identical RoHS, REACH, and ECCN classifications, maintaining regulatory consistency in system design.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 4590-273K directly replace the Bourns 5900-270 without PCB modifications?

A: Yes. Both components use identical axial through-hole packages with compatible physical dimensions (0.453" to 0.455" diameter, 0.900" length). No PCB layout changes are required.

Q: What are the key electrical differences between these parts?

A: The 4590-273K provides higher current capacity (5.15 A vs. 3.6 A) and lower DC resistance (25 mOhm vs. 32 mOhm). Both maintain 27 µH inductance at ±10% tolerance. These differences represent performance improvements, not incompatibilities.

Q: Does the extended temperature range of the 4590-273K affect compatibility?

A: No. The 4590-273K's -55°C to 125°C range encompasses the original -55°C to 105°C specification. This provides additional operational margin without affecting existing system performance.

Q: Are there compliance or certification concerns when substituting?

A: Both components share identical RoHS non-compliance status, REACH unaffected classification, and EAR99 ECCN designation. No compliance changes occur with substitution.

Q: Why is the 5900-270 obsolete?

A: The 5900-270 is classified as obsolete by Bourns. The 4590-273K, maintained in active production by API Delevan, provides equivalent functionality with improved specifications and assured supply availability.