Bourns 5900-473 47mH Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 5900-473 is a 47 mH unshielded drum core wirewound inductor rated for 100 mA continuous current with a maximum DC resistance of 40 ohms. This through-hole axial component operates across a temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance filtering and energy storage in power circuits.

The 5900-473 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and legacy system support.

Substiute Parts

5900-473

Bourns Inc.In Stock: 9645900-473 Datasheet

Current PartRFQ

4590-476K

API Delevan Inc.In Stock: 7134590-476K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 5900-473 is determined by the following critical parameters:

• Inductance Value: Must be 47 mH ±10% to maintain circuit performance
• Core Type and Shielding: Must be ferrite drum core, unshielded to match electromagnetic characteristics
• Mounting and Package: Must be through-hole axial configuration for mechanical compatibility
• Current Handling: Substitute must support minimum 100 mA continuous operation
• DC Resistance: Lower DCR values are acceptable; higher values may impact circuit efficiency
• Operating Temperature: Must support the required temperature range or broader range
• Inductance Test Frequency: Must be characterized at 1 kHz

The API Delevan 4590-476K meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 4590-476K is a direct functional substitute for the obsolete Bourns 5900-473. Selection between these parts should be based on the following factors:

Product Status: The 5900-473 is obsolete with no ongoing manufacturing. The 4590-476K is active production, ensuring long-term availability and supply chain stability.

Electrical Performance: The 4590-476K provides superior electrical characteristics with 40 mA additional current capacity and 6.3 ohms lower DC resistance. These improvements reduce thermal dissipation and expand operational headroom in current-limited applications.

Compliance and Certifications: Both parts carry identical RoHS non-compliance status, REACH unaffected designation, and EAR99 export classification. The 4590-476K operates across an extended temperature range (-55°C to 125°C versus -55°C to 105°C), providing additional thermal margin for demanding environments.

Physical Compatibility: Dimensional differences are negligible (0.002" diameter variance, identical length). Both components maintain axial through-hole configuration suitable for standard PCB mounting.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 4590-476K directly replace the Bourns 5900-473 in existing designs?

A: Yes. Both inductors share identical inductance values, tolerances, core materials, shielding characteristics, and mounting configurations. The 4590-476K's higher current rating and lower DC resistance make it functionally superior for the same application space.

Q: What is the significance of the current rating difference (100 mA vs. 140 mA)?

A: The 4590-476K supports 40 mA additional continuous current. In applications operating near the 100 mA limit of the original part, the substitute provides operational margin and reduced thermal stress.

Q: Does the lower DC resistance of the 4590-476K affect circuit behavior?

A: Lower DC resistance reduces power dissipation and heat generation. In series filtering applications, this improves efficiency. The 6.3 ohm difference is negligible in most circuit topologies but beneficial in power-sensitive designs.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: Yes. The 0.002" diameter difference and identical axial length ensure mechanical compatibility with standard through-hole footprints designed for the original 5900-473.

Q: What compliance considerations apply to this substitution?

A: Both parts share identical RoHS non-compliance status and REACH unaffected designation. No compliance changes result from this substitution. Verify compliance requirements against your specific application and regional regulations.

Q: Is the extended temperature range of the 4590-476K beneficial?

A: The 4590-476K operates to 125°C versus 105°C for the original part. This extended range provides thermal margin in high-temperature environments and improves reliability in applications with elevated ambient or self-heating conditions.