DC1390-474K Equivalent & Substitute Parts

Part Overview

The DC1390-474K is a 470 µH unshielded through-hole inductor manufactured by API Delevan Inc., rated for 4.57 A continuous current with a maximum DC resistance of 114 mOhm. This ferrite-core component operates across the temperature range of -55°C to 125°C and is classified as Active product status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Specification Basis
Inductance	470 µH	Core electrical characteristic
Inductance Tolerance	±10%	Manufacturing tolerance
Current Rating	4.57 A (Main Part)	Continuous current capacity
DC Resistance (DCR)	114 mOhm Max	Winding resistance specification
Shielding	Unshielded	Electromagnetic containment
Core Material	Ferrite	Magnetic core composition
Mounting Type	Through Hole	PCB assembly method
Package Type	Radial, Vertical Cylinder	Physical form factor
Operating Temperature	-55°C to 125°C	Thermal operating range
Test Frequency	1 kHz	Inductance measurement standard

Substitute Part Grouping Explanation

Substitution eligibility for the DC1390-474K is determined by strict alignment with the following critical parameters:

Electrical Equivalence Requirements:

Inductance value: 470 µH ±10%
DC Resistance: 114 mOhm maximum
Current Rating: minimum 4.57 A continuous
Shielding configuration: Unshielded
Core material: Ferrite

Mechanical Compatibility Requirements:

Mounting type: Through Hole
Package configuration: Radial, Vertical Cylinder
Form factor: Compatible with existing PCB footprints

Environmental Compliance:

Operating temperature range must encompass or match the -55°C to 125°C specification
Inductance measurement standard: 1 kHz

The substitute part 1140-471K-RC (Bourns Inc.) meets all electrical and mechanical criteria. It maintains identical inductance (470 µH ±10%), equivalent DC resistance (114 mOhm max), exceeds the current rating requirement (4.9 A vs. 4.57 A), and shares the same through-hole radial vertical cylinder package configuration.

Parameter Comparison

Parameter	DC1390-474K (API Delevan)	1140-471K-RC (Bourns)	Compatibility Status
Inductance	470 µH	470 µH	Equivalent
Inductance Tolerance	±10%	±10%	Equivalent
Current Rating (Amps)	4.57 A	4.9 A	Substitute exceeds requirement
Current - Saturation (Isat)	6.2 A	9.5 A	Substitute exceeds requirement
DC Resistance (DCR)	114 mOhm Max	114 mOhm Max	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Core Material	Ferrite	Ferrite	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	Radial, Vertical Cylinder	Radial, Vertical Cylinder	Equivalent
Size / Dimension (Dia)	1.480" (37.60 mm)	1.500" (38.10 mm)	Within tolerance
Height - Seated (Max)	1.064" (27.03 mm)	1.030" (26.16 mm)	Within tolerance
Operating Temperature	-55°C to 125°C	-55°C to 105°C	Substitute range narrower at upper limit
Inductance Frequency - Test	1 kHz	1 kHz	Equivalent
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute offers improved compliance
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

Primary Selection (DC1390-474K): Select the DC1390-474K when the full operating temperature range of -55°C to 125°C is required. This part maintains Active product status and is immediately available with 656 units in stock.

Substitute Selection (1140-471K-RC): The 1140-471K-RC qualifies as a direct substitute when:

Operating temperature requirements do not exceed 105°C at the upper limit
RoHS3 compliance is required or preferred for new designs
Higher saturation current (9.5 A vs. 6.2 A) provides additional design margin
Larger inventory availability (1274 units) supports extended procurement cycles

Both parts share identical electrical specifications (470 µH ±10%, 114 mOhm DCR) and mechanical form factors (through-hole radial vertical cylinder). Physical dimensions differ marginally (diameter 37.60 mm vs. 38.10 mm; height 27.03 mm vs. 26.16 mm) and remain compatible with standard PCB footprints for this package class.

Frequently Asked Questions (FAQ)

Q: Can the 1140-471K-RC replace the DC1390-474K in all applications?

A: The 1140-471K-RC is electrically and mechanically compatible for applications operating at temperatures up to 105°C. If your circuit requires operation above 105°C, the DC1390-474K is the required choice due to its -55°C to 125°C rating.

Q: Are the physical dimensions different enough to cause PCB layout issues?

A: Dimensional differences are minimal. The 1140-471K-RC diameter is 0.020" (0.50 mm) larger and height is 0.034" (0.87 mm) smaller than the DC1390-474K. Both maintain radial vertical cylinder configuration and are compatible with standard through-hole footprints for this inductor class.

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

A: The 1140-471K-RC saturation current of 9.5 A exceeds the DC1390-474K specification of 6.2 A. This provides additional margin before inductor saturation occurs, which may benefit designs with transient current spikes or future design iterations requiring higher current capacity.

Q: Does RoHS3 compliance matter for my application?

A: RoHS3 compliance is mandatory for products sold into European markets and many regulated industries. The 1140-471K-RC meets ROHS3 requirements, while the DC1390-474K is RoHS non-compliant. Select based on your regulatory and customer requirements.

Q: Are both parts measured at the same frequency?

A: Yes. Both the DC1390-474K and 1140-471K-RC have inductance specifications measured at 1 kHz, ensuring direct electrical comparison.

Q: What is the tolerance on inductance for both parts?

A: Both parts carry ±10% inductance tolerance. At 470 µH, this represents a range of 423 µH to 517 µH for either part.

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