DC1390R-274K Equivalent & Substitute Parts

Part Overview

The DC1390R-274K is a 270 µH fixed unshielded inductor manufactured by API Delevan Inc., designed for through-hole mounting applications. This component is rated for 6.52 A continuous current with a maximum DC resistance of 56 mOhm and operates across the temperature range of -55°C to 125°C. The part is currently in active production status with 748 units available in stock.

Substitute parts are identified to provide design flexibility when the primary component is unavailable, when inventory constraints exist, or when alternative supplier options are required for procurement optimization.

Substiute Parts

DC1390R-274K

API Delevan Inc.In Stock: 800DC1390R-274K Datasheet

Current PartRFQ

1140-271K-RC

Bourns Inc.In Stock: 9561140-271K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DC1390R-274K is determined by the following critical parameters:

Inductance Value: 270 µH with ±10% tolerance is the primary electrical specification. Substitute parts must match this inductance value within the specified tolerance band.

Current Rating: The DC1390R-274K is rated for 6.52 A continuous current. Substitute parts must meet or exceed this current rating to ensure safe operation under identical load conditions.

DC Resistance: Maximum DC resistance of 56 mOhm is a critical thermal and efficiency parameter. Substitute parts must not exceed this specification to maintain equivalent power dissipation characteristics.

Core Material and Shielding: Ferrite core material and unshielded construction define the electromagnetic performance profile. Substitute parts must maintain these characteristics.

Mounting and Package: Through-hole mounting with radial, vertical cylinder package configuration must be preserved for mechanical compatibility with existing PCB designs.

Compliance Standards: RoHS3 compliance and REACH unaffected status are mandatory for regulatory equivalence.

The substitute part 1140-271K-RC from Bourns Inc. meets all these critical parameters and qualifies as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (DC1390R-274K): Select this component when the full operating temperature range of -55°C to 125°C is required. This part is in active production status with adequate inventory availability (748 units in stock).

Substitute Part (1140-271K-RC): This Bourns component is suitable for applications where the operating temperature range can be limited to -55°C to 105°C. The substitute part provides superior current handling capability (7 A rated vs. 6.52 A) and higher saturation current (12.4 A vs. 8.05 A), offering additional design margin. Both parts maintain ROHS3 compliance and REACH unaffected status. The substitute part is also in active production with higher inventory availability (850 units in stock).

Compliance Equivalence: Both parts are ROHS3 compliant and REACH unaffected, ensuring regulatory compatibility for equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can the 1140-271K-RC substitute for the DC1390R-274K in all applications?

A: The 1140-271K-RC is electrically and mechanically equivalent for applications operating within the temperature range of -55°C to 105°C. Applications requiring operation above 105°C must use the DC1390R-274K to maintain full temperature range coverage.

Q: What are the physical dimension differences between these parts?

A: The DC1390R-274K has a diameter of 1.480" (37.60 mm) and seated height of 1.064" (27.03 mm). The 1140-271K-RC has a diameter of 1.500" (38.10 mm) and seated height of 1.030" (26.16 mm). Both use radial, vertical cylinder package configuration. PCB layout verification is required to confirm mechanical fit.

Q: Are the DC resistance specifications identical?

A: Both parts specify a maximum DC resistance of 56 mOhm, ensuring equivalent thermal and efficiency performance in the circuit.

Q: What is the significance of the higher saturation current in the substitute part?

A: The 1140-271K-RC has a saturation current of 12.4 A compared to 8.05 A for the DC1390R-274K. This provides additional design margin and allows operation closer to saturation limits without performance degradation.

Q: Are both parts suitable for RoHS3 and REACH-compliant applications?

A: Both the DC1390R-274K and 1140-271K-RC are ROHS3 compliant and REACH unaffected, making them suitable for equivalent regulatory requirements.

Q: What is the inductance tolerance specification?

A: Both parts are specified with ±10% inductance tolerance at 1 kHz test frequency, ensuring equivalent electrical performance within this tolerance band.