DC1390-154K Equivalent & Substitute Parts

Part Overview

The DC1390-154K is a 150 µH fixed unshielded inductor manufactured by API Delevan Inc., rated for 7.72 A continuous current with a maximum DC resistance of 40 mOhm. This through-hole radial component operates across the temperature range of -55°C to 125°C and is currently in active production status with 650 pieces available in inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. The DC1390-154K operates as an unshielded ferrite-core inductor in radial vertical cylinder configuration, making direct substitution dependent on matching inductance value, current rating, DC resistance, and mounting type.

Key Parameters

Parameter	Value	Specification
Inductance	150 µH	±10% tolerance
Current Rating	7.72 A	Continuous
Saturation Current (Isat)	10.8 A	Maximum
DC Resistance (DCR)	40 mOhm Max	At rated current
Core Material	Ferrite	Unshielded
Mounting Type	Through Hole	Radial configuration
Operating Temperature	-55°C to 125°C	Full range
Package Type	Radial, Vertical Cylinder	1.480" Dia × 1.064" Height

Substitute Part Grouping Explanation

Substitution of the DC1390-154K is based on the following critical parameters that must remain equivalent:

Electrical Parameters (Must Match):

Inductance value: 150 µH with ±10% tolerance
DC Resistance: 40 mOhm maximum
Core material: Ferrite
Shielding classification: Unshielded

Current Performance (Must Equal or Exceed):

Continuous current rating: minimum 7.72 A
Saturation current (Isat): minimum 10.8 A

Mechanical & Environmental Parameters (Must Be Compatible):

Mounting type: Through hole
Package configuration: Radial
Operating temperature range: must encompass or match -55°C to 125°C
Inductance test frequency: 1 kHz

The substitute part 1140-151K-RC from Bourns Inc. meets these substitution criteria through equivalent inductance, matching DC resistance specification, identical core material, and compatible through-hole radial mounting. The substitute demonstrates higher current capability (8.3 A continuous, 16.9 A saturation), which provides additional design margin without compromising circuit function.

Parameter Comparison

Parameter	DC1390-154K (API Delevan)	1140-151K-RC (Bourns)	Compatibility
Inductance	150 µH ±10%	150 µH ±10%	Equivalent
Current Rating (Continuous)	7.72 A	8.3 A	Substitute exceeds requirement
Saturation Current (Isat)	10.8 A	16.9 A	Substitute exceeds requirement
DC Resistance (DCR)	40 mOhm Max	40 mOhm Max	Equivalent
Core Material	Ferrite	Ferrite	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package Configuration	Radial, Vertical Cylinder	Radial	Compatible
Operating Temperature Range	-55°C to 125°C	-55°C to 105°C	Substitute range is narrower
Inductance Test Frequency	1 kHz	1 kHz	Equivalent
RoHS Status	Non-compliant	ROHS3 Compliant	Substitute offers improved compliance

Engineering Selection Recommendations

DC1390-154K Selection Criteria:

Required when full operating temperature range of -55°C to 125°C is mandatory
Specified in designs requiring API Delevan component qualification
Appropriate for applications where RoHS non-compliance is acceptable or not required

1140-151K-RC Selection Criteria:

Suitable for applications operating within -55°C to 105°C temperature range
Preferred when ROHS3 compliance is required by design specification or regulatory requirement
Recommended when higher current margin (8.3 A vs 7.72 A) provides additional design safety
Applicable when Bourns component qualification is acceptable in the design

Both parts maintain identical inductance, DC resistance, and core material specifications. The substitute part provides superior current handling capability and improved regulatory compliance status. Temperature range consideration is the primary differentiator for applications requiring operation above 105°C.

Frequently Asked Questions (FAQ)

Q: Can the 1140-151K-RC directly replace the DC1390-154K in existing designs?

A: Direct replacement is possible for applications operating within the -55°C to 105°C temperature range. If the circuit requires operation above 105°C, the DC1390-154K must be retained due to its extended upper temperature limit of 125°C.

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

A: The 1140-151K-RC provides 8.3 A continuous current versus 7.72 A in the DC1390-154K, and 16.9 A saturation current versus 10.8 A. This additional margin reduces thermal stress and extends component life in current-limited applications, though both parts meet the same 150 µH inductance and 40 mOhm DC resistance specifications.

Q: Are the physical dimensions compatible between these parts?

A: Both parts use radial through-hole mounting. The DC1390-154K measures 1.480" diameter × 1.064" height, while the 1140-151K-RC measures 1.500" diameter × 1.030" height. These dimensional differences are minor and typically accommodate standard through-hole PCB layouts, though board-level clearance verification is recommended for space-constrained designs.

Q: What is the impact of RoHS compliance differences?

A: The DC1390-154K is RoHS non-compliant, while the 1140-151K-RC is ROHS3 compliant. Selection depends on end-product regulatory requirements. If RoHS compliance is mandated, the 1140-151K-RC is the appropriate choice.

Q: Do both parts use the same core material and shielding?

A: Yes. Both the DC1390-154K and 1140-151K-RC use ferrite core material in unshielded configuration, ensuring equivalent electromagnetic performance and EMI characteristics.

Q: What inductance test frequency applies to both parts?

A: Both parts are specified at 1 kHz inductance test frequency, ensuring measurement consistency and direct parameter comparison.

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