Bourns 5900-390 Equivalent & Substitute Parts

Part Overview

The Bourns 5900-390 is a 39 µH unshielded drum core wirewound inductor rated for 3.3 A continuous current with a maximum DC resistance of 39 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 values in the microhenry range.

The 5900-390 carries an obsolete product status, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. Substitute components must maintain the same inductance value, tolerance, core material, and mounting configuration while meeting or exceeding the electrical performance requirements of the original specification.

Substiute Parts

5900-390

Bourns Inc.In Stock: 12025900-390 Datasheet

Current PartRFQ

4590-393K

API Delevan Inc.In Stock: 9314590-393K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Bourns 5900-390 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 39 µH (exact match required)
• Inductance tolerance: ±10% (exact match required)
• Core material: Ferrite (exact match required)
• Shielding configuration: Unshielded (exact match required)
• Mounting type: Through Hole (exact match required)
• Package type: Axial (exact match required)
• Inductance test frequency: 1 kHz (exact match required)

Secondary Compatibility Parameters:

• Current rating: Substitute must equal or exceed 3.3 A
• DC resistance: Substitute must not exceed 39 mOhm Max
• Operating temperature range: Substitute must cover or exceed -55°C to 105°C
• Physical dimensions: Substitute must be compatible with -0.453" Dia x 0.900" L (11.51mm x 22.86mm) footprint

The API Delevan 4590-393K meets all primary substitution criteria and exceeds secondary performance parameters, qualifying it as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 4590-393K is a qualified substitute for the obsolete Bourns 5900-390 based on the following factors:

Electrical Equivalence: Both components share identical inductance (39 µH), tolerance (±10%), core material (ferrite), and test frequency (1 kHz). The 4590-393K provides superior electrical performance with a current rating of 4.63 A versus 3.3 A and reduced DC resistance of 31 mOhm versus 39 mOhm maximum.

Mechanical Compatibility: Physical dimensions are nearly identical, with the 4590-393K measuring 0.455" Dia x 0.900" L compared to 0.453" Dia x 0.900" L. Both components use axial through-hole mounting, ensuring PCB footprint compatibility.

Product Status and Compliance: The 4590-393K maintains active product status, ensuring long-term availability and supply chain continuity. Both components carry identical RoHS non-compliant, REACH unaffected, and EAR99 ECCN classifications.

Temperature Performance: The 4590-393K extends the operating temperature range to -55°C to 125°C, providing additional thermal margin beyond the original -55°C to 105°C specification.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 4590-393K be used as a direct replacement for the Bourns 5900-390?

A: Yes. Both components meet identical inductance, tolerance, core material, shielding, and mounting specifications. The 4590-393K exceeds the original current rating and DC resistance requirements, making it functionally equivalent for applications designed around the 5900-390 specification.

Q: What are the key differences between these two inductors?

A: The primary differences are product status (5900-390 is obsolete; 4590-393K is active), current rating (3.3 A versus 4.63 A), DC resistance (39 mOhm versus 31 mOhm), and operating temperature range (-55°C to 105°C versus -55°C to 125°C). Physical dimensions differ by 0.002" in diameter.

Q: Are there any compatibility concerns with PCB layout or footprint?

A: No. Both components use identical axial through-hole mounting with nearly identical physical dimensions (0.002" diameter difference). Existing PCB designs for the 5900-390 accommodate the 4590-393K without modification.

Q: Does the lower DC resistance of the 4590-393K affect circuit performance?

A: Lower DC resistance reduces resistive losses and heat generation in the inductor, which is beneficial for circuit efficiency. This change does not negatively impact circuit function when substituting the 5900-390.

Q: Are compliance certifications identical between these components?

A: Yes. Both components carry identical RoHS non-compliant, REACH unaffected, and EAR99 ECCN classifications. Compliance status remains unchanged when substituting the 4590-393K for the 5900-390.