4590-394K Equivalent & Substitute Parts

Part Overview

The 4590-394K is a 390 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.52 A continuous current with a maximum DC resistance of 288 mOhm. This through-hole axial component operates across the industrial temperature range of -55°C to 125°C and is currently in active production status.

Substitute parts become necessary when the original part number experiences extended lead times, inventory constraints, or when design requirements mandate compliance with specific regulatory standards such as RoHS3. The substitute maintains electrical and mechanical equivalence while offering improved availability or enhanced compliance posture.

Substiute Parts

4590-394K

API Delevan Inc.In Stock: 11114590-394K Datasheet

Current PartRFQ

4590R-394K

API Delevan Inc.In Stock: 26954590R-394K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 4590R-394K qualifies as a direct electrical and mechanical substitute for the 4590-394K based on strict parameter equivalence across all critical specifications. Both parts share identical electrical characteristics: 390 µH inductance at ±10% tolerance, 1.52 A current rating, 880 mA saturation current, and 288 mOhm maximum DC resistance. The core material (ferrite), shielding configuration (unshielded), and thermal operating range (-55°C to 125°C) are identical.

Physical compatibility is confirmed through matching axial through-hole mounting, identical package dimensions (0.455" diameter × 0.900" length), and equivalent test conditions (1 kHz). The substitution is valid based on these allowed parameters without deviation.

Parameter Comparison

Engineering Selection Recommendations

Both the 4590-394K and 4590R-394K are active production components from API Delevan Inc. with full electrical and mechanical equivalence. Selection between these parts should be based on regulatory compliance requirements and supply chain considerations.

The 4590R-394K is RoHS3 compliant, making it the appropriate choice for applications subject to RoHS directives or customer specifications requiring RoHS certification. The 4590-394K, while RoHS non-compliant, remains suitable for applications without such regulatory constraints.

Both parts maintain identical performance characteristics across all electrical parameters, thermal ratings, and physical form factors, ensuring direct interchangeability in circuit design and PCB layout.

Frequently Asked Questions (FAQ)

Q: Can the 4590R-394K replace the 4590-394K in existing designs?

A: Yes. The 4590R-394K is electrically and mechanically equivalent to the 4590-394K. All critical parameters—inductance, current rating, DC resistance, core material, temperature range, and physical dimensions—are identical. Direct substitution is valid without circuit redesign.

Q: What is the primary difference between these two part numbers?

A: The 4590R-394K is RoHS3 compliant, while the 4590-394K is RoHS non-compliant. All other specifications are identical.

Q: Are there any mounting or footprint differences?

A: No. Both parts use identical axial through-hole mounting with matching physical dimensions of 0.455" diameter × 0.900" length (11.55 mm × 22.86 mm). PCB layouts and mechanical assemblies require no modification.

Q: Do these parts have different thermal performance?

A: No. Both parts operate across the same temperature range of -55°C to 125°C with identical DC resistance and current ratings.

Q: Which part should I specify for new designs?

A: Specify the 4590R-394K for new designs requiring RoHS3 compliance. For applications without RoHS requirements, either part is acceptable based on availability and cost considerations.

Q: Are there any frequency-dependent performance differences?

A: No. Both parts are tested at 1 kHz and share identical inductance values and tolerances at this test frequency.