DC1390R-125K Equivalent & Substitute Parts

Part Overview

The DC1390R-125K is a 1.2 mH fixed unshielded inductor manufactured by API Delevan Inc., designed for through-hole radial mounting applications. This ferrite-core component operates across the temperature range of -55°C to 125°C and is classified as Active product status. The part is ROHS3 compliant and REACH unaffected, making it suitable for modern electronic assembly requirements. Substitute parts are identified to provide alternative sourcing options when the primary component becomes unavailable or when inventory constraints require component flexibility.

Substiute Parts

DC1390R-125K

API Delevan Inc.In Stock: 711DC1390R-125K Datasheet

Current PartRFQ

1140-122K-RC

Bourns Inc.In Stock: 11651140-122K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DC1390R-125K is determined by strict equivalence across the following critical parameters:

Inductance Value: 1.2 mH with ±10% tolerance is the primary electrical specification. Substitute parts must match this inductance value exactly.

Current Rating: The DC1390R-125K operates at 3.21 A nominal current. Substitute parts must maintain equal or greater current capacity to ensure thermal and electrical performance equivalence.

DC Resistance: Maximum DCR of 232 mOhm is a critical parameter affecting power dissipation and circuit performance. Substitute parts must not exceed this specification.

Core Material and Shielding: Ferrite core construction with unshielded configuration defines the electromagnetic characteristics. Substitute parts must maintain identical core material and shielding classification.

Mounting and Package: Through-hole radial vertical cylinder configuration is mandatory for mechanical compatibility with existing PCB layouts.

Compliance and Temperature Range: ROHS3 compliance and operating temperature range of -55°C to 125°C establish the environmental and regulatory baseline for substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

The 1140-122K-RC from Bourns Inc. qualifies as a functional substitute for the DC1390R-125K based on electrical parameter equivalence. Both components are Active product status with ROHS3 compliance and REACH unaffected certification.

Electrical Equivalence: Inductance value, tolerance, and DC resistance specifications are identical. The 1140-122K-RC provides higher current rating (3.4 A versus 3.21 A) and higher saturation current (5.9 A versus 3.87 A), which represents improved electrical headroom without introducing incompatibility.

Temperature Limitation: The substitute part operates to 105°C maximum, compared to 125°C for the primary part. Applications requiring operation above 105°C must use the DC1390R-125K.

Mechanical Compatibility: Both components use through-hole radial vertical cylinder packaging. Dimensional differences are minor: the substitute is 0.020" larger in diameter and 0.034" shorter in height. PCB layout verification is required to confirm clearance compatibility.

Compliance Status: Both parts maintain equivalent regulatory compliance across ROHS3 and REACH requirements, supporting modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the 1140-122K-RC replace the DC1390R-125K in all applications?

A: The 1140-122K-RC is electrically equivalent for inductance, tolerance, and DC resistance specifications. However, if your application requires operation above 105°C, the substitute is not suitable. Verify your maximum operating temperature requirement before substitution.

Q: What is the significance of the higher current rating on the substitute part?

A: The 1140-122K-RC is rated for 3.4 A compared to 3.21 A on the primary part. This higher rating provides additional thermal margin and does not create incompatibility. The component will perform identically in circuits designed for the lower current rating.

Q: Are there mechanical compatibility concerns with the dimensional differences?

A: The substitute is 0.020" larger in diameter and 0.034" shorter in height. These differences are within typical PCB layout tolerances for radial through-hole components. Verify clearance around the component footprint to confirm fit in your specific application.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the DC1390R-125K and 1140-122K-RC are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and assembly.

Q: What is the difference in moisture sensitivity between these parts?

A: The DC1390R-125K is classified as MSL 1 (Unlimited), while the 1140-122K-RC is listed as Not Applicable. This indicates the primary part has defined moisture sensitivity handling requirements, while the substitute does not. Follow the primary part's MSL 1 handling procedures if substituting.

Q: Can I use the 1140-122K-RC if my circuit operates at 120°C?

A: No. The 1140-122K-RC maximum operating temperature is 105°C. At 120°C operation, use the DC1390R-125K, which is rated to 125°C.