DC1390R-183K Fixed Inductor Equivalent & Substitute Parts

Part Overview

The DC1390R-183K is an 18 µH unshielded fixed inductor manufactured by API Delevan Inc., designed for through-hole mounting applications requiring high current handling capability. This ferrite-core inductor is rated for 17.3 A continuous current with a maximum DC resistance of 8 mOhm and operates across the temperature range of -55°C to 125°C. The component is classified as Active product status with full RoHS3 compliance and REACH unaffected designation.

Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when design requirements permit functional alternatives within specified electrical and mechanical parameters.

Substiute Parts

DC1390R-183K

API Delevan Inc.In Stock: 878DC1390R-183K Datasheet

Current PartRFQ

1140-180K-RC

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DC1390R-183K are identified based on strict electrical and mechanical compatibility criteria. The substitution logic requires that alternative components maintain the following parameters within acceptable tolerances:

Critical Substitution Parameters:

• Inductance value: 18 µH at ±10% tolerance
• Current rating: minimum 17.2 A continuous
• DC resistance: maximum 8 mOhm
• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Through Hole
• Package configuration: Radial, Vertical Cylinder
• Operating temperature range: minimum -55°C to 105°C overlap
• Regulatory compliance: RoHS3 and REACH status maintained

The Bourns Inc. 1140-180K-RC meets all critical substitution criteria and is classified as a direct functional equivalent for the DC1390R-183K in applications where the specified electrical and mechanical parameters are required.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: DC1390R-183K

The DC1390R-183K remains the primary selection when the extended upper operating temperature limit of 125°C is required. This component is Active product status with full regulatory compliance and represents the specified design requirement.

Substitute Part: 1140-180K-RC

The Bourns 1140-180K-RC is a qualified substitute when the following conditions are met:

1. Operating temperature requirement does not exceed 105°C
2. Saturation current margin of 49.2 A (versus 30.4 A specification) is acceptable for the application
3. Procurement of the primary part number is not feasible within required lead time
4. Both components maintain identical RoHS3 and REACH compliance status

Both parts are Active product status with confirmed inventory availability. The substitute part exhibits superior saturation current performance, which provides additional design margin in high-current transient conditions.

Frequently Asked Questions (FAQ)

Q: Can the 1140-180K-RC be used as a direct replacement for DC1390R-183K in all applications?

A: The 1140-180K-RC is a functional equivalent for applications where the maximum operating temperature does not exceed 105°C. The primary part number specifies operation to 125°C. Verify application temperature requirements before substitution.

Q: What is the significance of the different saturation current ratings (30.4 A vs. 49.2 A)?

A: Saturation current defines the point at which inductor core material reaches magnetic saturation and inductance begins to degrade. The substitute part exhibits higher saturation current, providing greater margin against current transients. This is not a limitation but rather an enhanced characteristic.

Q: Are the physical dimensions compatible between these two parts?

A: Both parts use identical Radial, Vertical Cylinder package configuration with through-hole mounting. The DC1390R-183K has a diameter of 1.480" (37.60 mm) and seated height of 1.064" (27.03 mm). The 1140-180K-RC has a diameter of 1.500" (38.10 mm) and seated height of 1.030" (26.16 mm). Verify PCB layout and mechanical clearance before substitution.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the DC1390R-183K and 1140-180K-RC are RoHS3 Compliant and REACH Unaffected, meeting identical regulatory standards for electronic component use.

Q: What is the inductance tolerance specification for both parts?

A: Both parts are specified at ±10% inductance tolerance, measured at 1 kHz test frequency. This tolerance applies equally to both the primary and substitute components.

Q: Is there a difference in DC resistance between these inductors?

A: No. Both parts specify a maximum DC resistance of 8 mOhm, ensuring identical resistive losses in circuit operation.