DC1390-683K Equivalent & Substitute Parts

Part Overview

The DC1390-683K is a 68 µH unshielded ferrite core inductor manufactured by API Delevan Inc., rated for 10.7 A continuous current with a maximum DC resistance of 21 mOhm. This through-hole radial inductor operates across the temperature range of -55°C to 125°C and is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production with 933 pieces available in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit equivalent electrical and mechanical specifications.

Substiute Parts

DC1390-683K

API Delevan Inc.In Stock: 1028DC1390-683K Datasheet

Current PartRFQ

1140-680K-RC

Bourns Inc.In Stock: 17611140-680K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DC1390-683K is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value: 68 µH at 1 kHz test frequency
• Inductance tolerance: ±10%
• DC resistance: 21 mOhm maximum
• Current rating: minimum 10.7 A continuous
• Saturation current: minimum 16.3 A

Mechanical Equivalence Criteria:

• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Through hole
• Package configuration: Radial, vertical cylinder

Environmental Criteria:

• Operating temperature range must encompass or match -55°C to 125°C

The substitute part 1140-680K-RC meets all electrical and mechanical equivalence criteria. Both parts share identical inductance, tolerance, DC resistance specification, and core material. The substitute demonstrates superior current handling (11.4 A rated, 25.2 A saturation) and maintains mechanical compatibility through identical package configuration and mounting type.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: DC1390-683K

• Active product status with established supply (933 units in stock)
• Extended operating temperature range to 125°C
• RoHS non-compliant status; REACH unaffected
• Suitable for applications requiring maximum temperature performance

Substitute Part: 1140-680K-RC

• Active product status with higher inventory availability (1,673 units in stock)
• ROHS3 compliant; REACH unaffected
• Operating temperature range limited to 105°C maximum
• Superior current handling margins (11.4 A rated vs. 10.7 A; 25.2 A saturation vs. 16.3 A)
• Suitable for applications where RoHS3 compliance is required and maximum operating temperature does not exceed 105°C

Selection between these parts depends on two primary factors: (1) regulatory compliance requirement (RoHS3 status), and (2) maximum operating temperature specification of the end application. Both parts are electrically and mechanically equivalent for DC resistance, inductance value, and package configuration.

Frequently Asked Questions (FAQ)

Q: Can the 1140-680K-RC directly replace the DC1390-683K in all applications?

A: Direct replacement is possible only when the application's maximum operating temperature does not exceed 105°C. The DC1390-683K supports operation to 125°C, while the 1140-680K-RC is rated to 105°C maximum. All other electrical and mechanical parameters are equivalent or superior in the substitute part.

Q: What is the significance of the current rating difference (10.7 A vs. 11.4 A)?

A: The 1140-680K-RC has a higher continuous current rating and saturation current (25.2 A vs. 16.3 A). This provides additional design margin in applications operating near the current limits of the DC1390-683K. Both parts meet the 21 mOhm DC resistance specification identically.

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

A: Both parts use radial, vertical cylinder package configuration with through-hole mounting. The DC1390-683K has a diameter of 1.480" (37.60 mm) and height of 1.064" (27.03 mm). The 1140-680K-RC has a diameter of 1.500" (38.10 mm) and height of 1.030" (26.16 mm). These dimensions are sufficiently similar for most PCB layouts, though physical fit should be verified for space-constrained designs.

Q: What is the difference between the core types listed?

A: The DC1390-683K uses a ferrite core. The 1140-680K-RC uses a drum core, wirewound ferrite construction. Both are ferrite-based unshielded inductors with identical inductance and DC resistance specifications. The drum core construction in the substitute contributes to its higher saturation current rating.

Q: Does RoHS compliance affect electrical performance?

A: RoHS3 compliance (1140-680K-RC) versus non-compliance (DC1390-683K) does not alter electrical performance. Compliance status is a regulatory and supply chain consideration. Selection should be based on end-product regulatory requirements and application operating temperature limits.

Q: Can these parts be used interchangeably in high-temperature applications?

A: No. Applications requiring sustained operation above 105°C must use the DC1390-683K, which is rated to 125°C. The 1140-680K-RC is limited to 105°C maximum operating temperature.