API Delevan 4590-124K Fixed Inductor Equivalent & Substitute Parts

Part Overview

The API Delevan 4590-124K is a fixed inductance through-hole component designed for general-purpose filtering and energy storage applications. This 120 µH unshielded drum core wirewound inductor operates at 2.43 A maximum current with a ferrite core construction. The part maintains Active product status with 740 units currently in stock.

Substitute parts become necessary when original inventory is depleted, when design revisions require RoHS compliance upgrades, or when alternative sourcing is required to maintain supply chain continuity. The 4590R-124K series provides a direct functional equivalent with enhanced regulatory compliance.

Substiute Parts

4590-124K

API Delevan Inc.In Stock: 8124590-124K Datasheet

Current PartRFQ

4590R-124K

API Delevan Inc.In Stock: 10624590R-124K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4590-124K is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match Exactly):

• Inductance value: 120 µH
• Inductance tolerance: ±10%
• Current rating: 2.43 A
• Saturation current (Isat): 1.6 A
• DC resistance: 113 mOhm maximum
• Core material: Ferrite

Mechanical Parameters (Must Match Exactly):

• Mounting type: Through Hole
• Package configuration: Axial
• Physical dimensions: 0.455" Dia × 0.900" L (11.55mm × 22.86mm)

Environmental Parameters (Must Match Exactly):

• Operating temperature range: -55°C to 125°C
• Shielding configuration: Unshielded

The 4590R-124K meets all electrical, mechanical, and environmental equivalence criteria. The primary distinction is regulatory compliance status, where the 4590R series achieves RoHS3 compliance compared to the non-compliant status of the original 4590 series.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

The 4590R-124K substitute part is electrically and mechanically identical to the 4590-124K across all functional parameters. Selection between these parts is determined by regulatory and compliance requirements rather than performance characteristics.

For RoHS3-Compliant Applications: Select the 4590R-124K. This part achieves full RoHS3 compliance and is required for designs subject to European Union Restriction of Hazardous Substances regulations or equivalent regional compliance mandates.

For Non-Compliant or Legacy Applications: The 4590-124K remains available with 740 units in current inventory. This part is suitable for applications where RoHS compliance is not a design requirement.

For Supply Chain Continuity: The 4590R-124K maintains higher inventory levels (1042 units) and represents the current production standard within the API Delevan 4590 series family. Long-term design implementations should incorporate the 4590R-124K to align with active manufacturing status.

Both parts share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications, ensuring equivalent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can the 4590R-124K be used as a direct replacement for the 4590-124K in existing PCB designs?

A: Yes. The 4590R-124K is a direct functional substitute. All electrical parameters (inductance, current rating, DC resistance, saturation current) are identical. Physical dimensions and through-hole mounting configuration are identical, enabling direct PCB footprint compatibility without layout modifications.

Q: What is the difference between the 4590 and 4590R series?

A: The 4590R series incorporates RoHS3 compliance, meeting European Union hazardous substance restrictions. The electrical and mechanical specifications remain unchanged. Both series use ferrite drum core construction and identical axial through-hole packaging.

Q: Are there any performance differences between these parts?

A: No. Both parts deliver 120 µH inductance at ±10% tolerance, support 2.43 A maximum current, and maintain 113 mOhm maximum DC resistance. Operating temperature range (-55°C to 125°C) and frequency characteristics are identical.

Q: Which part should be selected for new designs?

A: The 4590R-124K is the recommended selection for new designs. This part represents the current production standard with RoHS3 compliance and higher inventory availability (1042 units versus 740 units for the 4590-124K).

Q: Are these parts interchangeable in terms of PCB assembly?

A: Yes. Both parts use identical through-hole axial packaging with dimensions of 0.455" diameter × 0.900" length (11.55mm × 22.86mm). No PCB layout, footprint, or assembly process modifications are required when substituting between these parts.

Q: What is the saturation current specification, and why is it important?

A: The saturation current (Isat) is specified at 1.6 A for both parts. This represents the current level at which the ferrite core begins to saturate, causing inductance degradation. Design circuits must maintain operating current below this threshold to preserve specified inductance performance.

Q: Do these inductors require any special handling or storage conditions?

A: Both parts are classified as Not Applicable for Moisture Sensitivity Level (MSL), indicating standard handling and storage conditions are appropriate. No special moisture-barrier packaging or baking procedures are required.