DC1390-333K Equivalent & Substitute Parts Reference

Part Overview

The DC1390-333K is a 33 µH fixed unshielded inductor manufactured by API Delevan Inc., designed for through-hole mounting applications. This ferrite-core component is rated for 14.7 A continuous current with a maximum DC resistance of 11 mOhm and operates across the temperature range of -55°C to 125°C. The part is currently active in production with 985 pieces available in stock. Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as enhanced current ratings or improved regulatory compliance.

Substiute Parts

DC1390-333K

API Delevan Inc.In Stock: 1011DC1390-333K Datasheet

Current PartRFQ

1140-330K-RC

Bourns Inc.In Stock: 12321140-330K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DC1390-333K is determined by strict equivalence across the following critical parameters:

Inductance Value: 33 µH at 1 kHz test frequency with ±10% tolerance is the primary functional requirement.

Current Ratings: The substitute part must support the application's continuous current demand. The DC1390-333K is rated for 14.7 A continuous current with a saturation current of 22.6 A. Substitute parts with equal or higher current ratings maintain functional compatibility.

DC Resistance: Maximum DCR of 11 mOhm ensures thermal performance and power loss characteristics remain within acceptable limits for the application.

Core Material and Shielding: Ferrite core construction with unshielded configuration defines the electromagnetic performance profile. Substitutes must maintain identical core material and shielding characteristics.

Mounting and Package: Through-hole mounting with radial, vertical cylinder package configuration ensures mechanical compatibility with printed circuit board layouts.

Operating Temperature: The -55°C to 125°C operating range defines the thermal envelope. Substitute parts must support this full range or a compatible subset.

The Bourns 1140-330K-RC meets these substitution criteria with equivalent inductance, superior current ratings, and compatible mechanical and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

DC1390-333K Selection Criteria:

The DC1390-333K is appropriate for applications requiring the full operating temperature range of -55°C to 125°C. This part is currently active in production with established supply availability. However, the component is RoHS non-compliant, which may restrict use in regulated markets or applications with RoHS compliance mandates.

1140-330K-RC Selection Criteria:

The Bourns 1140-330K-RC is suitable for applications where RoHS3 compliance is required. This substitute provides superior current ratings (15.8 A continuous, 36.5 A saturation) compared to the DC1390-333K, offering design margin for high-current applications. The operating temperature range extends to 105°C maximum, which is acceptable for applications not requiring operation above this threshold. The 1140-330K-RC is currently active in production with 1122 pieces in stock, ensuring supply continuity.

Compliance Considerations:

Applications subject to RoHS directives must use the 1140-330K-RC. Applications operating continuously above 105°C must use the DC1390-333K or identify alternative parts with extended temperature ratings.

Frequently Asked Questions (FAQ)

Q: Can the 1140-330K-RC directly replace the DC1390-333K in all applications?

A: The 1140-330K-RC is functionally equivalent for inductance value, DC resistance, and mounting configuration. However, the operating temperature maximum is 105°C versus 125°C for the DC1390-333K. Substitution is valid only if the application does not require continuous operation above 105°C.

Q: What is the significance of the higher current ratings on the 1140-330K-RC?

A: The 1140-330K-RC is rated for 15.8 A continuous current and 36.5 A saturation current, compared to 14.7 A and 22.6 A respectively for the DC1390-333K. Higher ratings provide additional design margin and thermal headroom in high-current applications, reducing the risk of saturation or thermal stress.

Q: Are the physical dimensions compatible between these parts?

A: Both parts use radial, vertical cylinder packages with similar dimensions. The DC1390-333K measures 1.480" diameter by 1.064" height, while the 1140-330K-RC measures 1.500" diameter by 1.030" height. These dimensional differences are within typical PCB layout tolerances for through-hole components.

Q: What is the impact of RoHS compliance on part selection?

A: The DC1390-333K is RoHS non-compliant, while the 1140-330K-RC is RoHS3 compliant. Applications subject to RoHS regulations, including consumer electronics and certain industrial markets, require the RoHS3-compliant substitute. Non-regulated applications may use either part based on availability and performance requirements.

Q: How do the DC resistance values compare?

A: Both parts specify a maximum DC resistance of 11 mOhm, ensuring equivalent thermal performance and power dissipation characteristics in the application circuit.

Q: Is the ±10% inductance tolerance maintained across both parts?

A: Yes, both the DC1390-333K and 1140-330K-RC maintain ±10% inductance tolerance at 1 kHz test frequency, ensuring equivalent electrical performance within specified limits.