Bourns 5900-273 Equivalent & Substitute Parts

Part Overview

The Bourns 5900-273 is a 27 mH unshielded drum core wirewound inductor rated for 140 mA maximum current with 22 Ohm DC resistance, designed for through-hole axial mounting. This component operates across the temperature range of -55°C to 105°C and is specified at 1 kHz inductance frequency testing. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

5900-273

Bourns Inc.In Stock: 9765900-273 Datasheet

Current PartRFQ

4590-276K

API Delevan Inc.In Stock: 11314590-276K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 5900-273 is determined by the following critical parameters:

• Inductance Value: Must be 27 mH with ±10% tolerance
• Core Type and Shielding: Ferrite material, unshielded configuration
• Mounting and Package: Through-hole axial mounting
• Current Handling: Minimum 140 mA rating required
• DC Resistance: Maximum 22 Ohm specification
• Operating Temperature: Minimum -55°C to 105°C range

The API Delevan 4590-276K meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 4590-276K serves as a direct functional substitute for the obsolete Bourns 5900-273. The substitute part maintains identical inductance value and tolerance, matching core material and shielding configuration, and provides equivalent through-hole axial mounting compatibility. Physical dimensions are virtually identical, with negligible diameter variation (0.002" difference).

The 4590-276K offers improved specifications in two areas: current rating is increased to 170 mA (exceeding the 140 mA requirement), and operating temperature range extends to 125°C (compared to 105°C maximum). DC resistance increases marginally to 22.7 Ohm maximum, remaining within acceptable tolerance for equivalent circuit performance.

Both parts maintain identical RoHS non-compliance status and REACH unaffected classification. The substitute part is currently in active production status with confirmed inventory availability, providing supply chain continuity for designs requiring this inductor specification.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 4590-276K directly replace the Bourns 5900-273 in existing designs?

A: Yes. Both inductors share identical 27 mH inductance value, ±10% tolerance, ferrite unshielded core construction, and through-hole axial package configuration. Physical dimensions are equivalent, and the substitute part exceeds the original current rating specification.

Q: What is the significance of the higher current rating on the substitute part?

A: The 4590-276K is rated for 170 mA compared to the original 140 mA specification. This provides additional design margin and does not create compatibility issues in circuits designed for the lower current rating.

Q: How does the increased DC resistance affect circuit performance?

A: DC resistance increases from 22 Ohm maximum to 22.7 Ohm maximum, representing a 0.7 Ohm increase. This marginal difference remains within the ±10% inductance tolerance band and does not significantly alter circuit behavior in typical applications.

Q: Are there any compliance or certification differences between these parts?

A: Both parts share identical RoHS non-compliance status and REACH unaffected classification. No compliance advantages or disadvantages exist between the original and substitute part.

Q: What is the practical significance of the extended operating temperature range?

A: The substitute part operates to 125°C maximum compared to 105°C for the original part. This extended range provides additional thermal margin but does not restrict use in applications designed for the original -55°C to 105°C specification.