DC1390-183K Equivalent & Substitute Parts

Part Overview

The DC1390-183K is a fixed 18 µH unshielded inductor manufactured by API Delevan Inc., rated for 17.3 A continuous current with a maximum DC resistance of 8mOhm. This ferrite-core component is actively produced and available in bulk packaging. Equivalent and substitute parts may be required due to inventory constraints, regional availability, end-of-life considerations, or application-specific performance requirements within the electrical and mechanical parameter specifications.

Substiute Parts

DC1390-183K

API Delevan Inc.In Stock: 1028DC1390-183K Datasheet

Current PartRFQ

1140-180K-RC

Bourns Inc.In Stock: 11011140-180K-RC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The 1140-180K-RC manufactured by Bourns Inc. qualifies as a direct substitute for the DC1390-183K based on the following critical alignment of electrical and mechanical parameters:

Key Substitution Parameters:

• Inductance: Both parts are rated 18 µH with ±10% tolerance
• Current Rating: 17.2 A (1140-180K-RC) vs. 17.3 A (DC1390-183K) — functionally equivalent within 0.6% variance
• DC Resistance: Both rated 8 mOhm Max
• Core Material: Both ferrite-core construction
• Shielding: Both unshielded configurations
• Mounting Type: Both through-hole
• Package / Case: Both radial, vertical cylinder form factor
• Inductance Test Frequency: Both measured at 1 kHz

The substitute part maintains equivalent electrical performance across the primary functional parameters while providing compatible mechanical integration into existing PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

Both the DC1390-183K and 1140-180K-RC are active, in-production components with established supply chains. The DC1390-183K is RoHS non-compliant, while the 1140-180K-RC is ROHS3 compliant. For applications subject to RoHS or equivalent environmental compliance regulations, the 1140-180K-RC provides full regulatory alignment.

The DC1390-183K supports an extended operating temperature maximum of 125°C compared to the 1140-180K-RC at 105°C. High-temperature applications operating near or above 105°C must retain the original DC1390-183K specification.

Both parts are unaffected by REACH regulations and classified under EAR99 for export compliance purposes. The 1140-180K-RC offers superior saturation current performance (49.2 A vs. 30.4 A), providing additional design margin in peak current scenarios.

Mechanical integration verification is required due to dimensional differences: the 1140-180K-RC features a slightly larger diameter (1.500" vs. 1.480") and slightly reduced seated height (1.030" vs. 1.064"). PCB layout and enclosure clearances must be confirmed before part substitution.

Frequently Asked Questions (FAQ)

Q: Can the 1140-180K-RC directly replace the DC1390-183K in existing designs?

A: The 1140-180K-RC matches the DC1390-183K across all primary electrical specifications: inductance, current rating, and DC resistance. However, verify mechanical fit due to dimensional variations (diameter tolerance: +0.020", seated height reduction: -0.034"). Confirm RoHS compliance requirements and maximum operating temperature limits (105°C for the substitute vs. 125°C for the original).

Q: What are the critical parameters for inductor substitution?

A: Inductance value, current rating tolerance, DC resistance, core material, shielding type, mounting configuration, and package form factor determine substitutability. The 1140-180K-RC meets all these criteria for the DC1390-183K. Operating temperature range and compliance certifications (RoHS, REACH) must also be evaluated against application requirements.

Q: How do dimensional differences affect PCB layout?

A: The 1140-180K-RC requires verification of radial clearance (0.020" larger diameter) and vertical mounting clearance (-0.034" seated height). Review component placement against surrounding traces, vias, and adjacent parts. Mechanically validate footprint compatibility with the actual component body dimensions before PCB fabrication.

Q: Are there compliance or environmental considerations?

A: The DC1390-183K is RoHS non-compliant; the 1140-180K-RC is ROHS3 compliant. For products manufactured after RoHS effective dates or marketed in RoHS-regulated regions, the 1140-180K-RC provides full compliance. Both are REACH unaffected and classified under EAR99 export regulations.

Q: What is the saturation current difference impact?

A: The 1140-180K-RC saturates at 49.2 A versus 30.4 A for the DC1390-183K. This 62% higher saturation current in the substitute provides improved headroom during transient peak current events. This does not change the continuous current rating but offers superior performance margin in dynamic applications.