DC1390-105K Equivalent & Substitute Parts

Part Overview

The DC1390-105K is a 1 mH fixed unshielded inductor manufactured by API Delevan Inc., rated for 3.32 A continuous current with a maximum DC resistance of 216 mOhm. This through-hole radial component operates across the temperature range of -55°C to 125°C and is currently in active production status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and current rating category.

Substiute Parts

DC1390-105K

API Delevan Inc.In Stock: 959DC1390-105K Datasheet

Current PartRFQ

1140-102K-RC

Bourns Inc.In Stock: 26571140-102K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DC1390-105K is determined by the following critical parameters:

• Inductance Value: Must be 1 mH with ±10% tolerance
• Current Rating: Minimum 3.32 A continuous current capability
• DC Resistance: Maximum 216 mOhm to maintain equivalent electrical performance
• Saturation Current: Must support the application's peak current requirements
• Mounting Type: Through-hole configuration required for PCB compatibility
• Package Configuration: Radial geometry for mechanical fit
• Core Material: Ferrite construction for specified frequency response
• Operating Temperature: Must support the -55°C to 125°C range or a subset thereof

The substitute part 1140-102K-RC meets these criteria with equivalent inductance, matching DC resistance specification, and compatible through-hole radial mounting.

Parameter Comparison

Engineering Selection Recommendations

The 1140-102K-RC from Bourns Inc. is electrically and mechanically compatible with the DC1390-105K for applications operating within the -55°C to 105°C temperature window. The substitute part provides equivalent inductance and DC resistance specifications while offering higher current and saturation ratings, which provide additional design margin. The 1140-102K-RC achieves ROHS3 compliance, whereas the DC1390-105K is non-compliant. Selection between these parts should be based on regulatory requirements, temperature range constraints, and component availability.

Frequently Asked Questions (FAQ)

Q: Can the 1140-102K-RC replace the DC1390-105K in all applications?

A: The 1140-102K-RC is compatible for applications operating within -55°C to 105°C. If the application requires operation above 105°C up to 125°C, the DC1390-105K must be retained.

Q: Are the physical dimensions compatible?

A: Both parts use radial through-hole mounting. The DC1390-105K measures 1.480" diameter × 1.064" height; the 1140-102K-RC measures 1.500" diameter × 1.030" height. Verify PCB layout clearances before substitution.

Q: Do the DC resistance values match?

A: Yes, both parts specify a maximum DC resistance of 216 mOhm at 1 kHz test frequency, ensuring equivalent electrical performance in the circuit.

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

A: The 1140-102K-RC provides 3.6 A continuous current and 6.5 A saturation current compared to 3.32 A and 4.24 A respectively in the DC1390-105K. This allows operation with greater current margin without saturation.

Q: Does RoHS compliance affect electrical performance?

A: RoHS compliance reflects manufacturing process and material composition but does not alter the electrical specifications. The ROHS3-compliant 1140-102K-RC maintains identical inductance and resistance characteristics.