DC780-154K Equivalent & Substitute Parts

Part Overview

The DC780-154K is a 150 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 4 A continuous current with a maximum DC resistance of 98 mOhm. This through-hole component operates across the temperature range of -55°C to 125°C and is specified for 1 kHz inductance testing. The part is currently active in production with 816 pieces available in inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across inductance value, current rating, DC resistance, core material, shielding configuration, mounting type, and package dimensions. The DC780R-154K represents a direct functional equivalent with improved regulatory compliance status.

Key Parameters

Parameter	Specification
Inductance	150 µH
Inductance Tolerance	±10%
Current Rating	4 A
Saturation Current (Isat)	8.9 A
DC Resistance (DCR)	98 mOhm Max
Core Material	Ferrite
Shielding	Unshielded
Mounting Type	Through Hole
Package / Case	Radial, Vertical Cylinder
Diameter	0.772" (19.60 mm)
Height (Seated Max)	0.831" (21.10 mm)
Operating Temperature Range	-55°C to 125°C
Inductance Test Frequency	1 kHz

Substitute Part Grouping Explanation

Substitution of the DC780-154K is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters:

Inductance value: 150 µH
Inductance tolerance: ±10%
Current rating: 4 A continuous
Saturation current: 8.9 A
DC resistance: 98 mOhm maximum
Core material: Ferrite
Shielding configuration: Unshielded

Mechanical Parameters:

Mounting type: Through hole
Package configuration: Radial, vertical cylinder
Physical dimensions: 0.772" diameter (19.60 mm), 0.831" height maximum (21.10 mm)

Environmental Parameters:

Operating temperature range: -55°C to 125°C
Inductance test frequency: 1 kHz

The DC780R-154K satisfies all electrical and mechanical equivalence criteria while maintaining identical performance specifications. Substitution is valid when these parameters remain unchanged across the application circuit.

Parameter Comparison

Parameter	DC780-154K	DC780R-154K	Match Status
Inductance	150 µH	150 µH	Equivalent
Inductance Tolerance	±10%	±10%	Equivalent
Current Rating	4 A	4 A	Equivalent
Saturation Current (Isat)	8.9 A	8.9 A	Equivalent
DC Resistance (DCR)	98 mOhm Max	98 mOhm Max	Equivalent
Core Material	Ferrite	Ferrite	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	Radial, Vertical Cylinder	Radial, Vertical Cylinder	Equivalent
Diameter	0.772" (19.60 mm)	0.772" (19.60 mm)	Equivalent
Height (Seated Max)	0.831" (21.10 mm)	0.831" (21.10 mm)	Equivalent
Operating Temperature Range	-55°C to 125°C	-55°C to 125°C	Equivalent
Inductance Test Frequency	1 kHz	1 kHz	Equivalent
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Difference
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Both the DC780-154K and DC780R-154K are active production components from API Delevan Inc. with identical electrical and mechanical specifications. The primary distinction between these parts is regulatory compliance status.

The DC780-154K is RoHS non-compliant, while the DC780R-154K achieves ROHS3 compliance. For applications subject to RoHS directives or requiring compliance documentation, the DC780R-154K is the appropriate selection. Both parts maintain REACH unaffected status and EAR99 export classification.

Selection between these parts is determined by regulatory requirements applicable to the end application and manufacturing location. When RoHS compliance is mandatory, the DC780R-154K provides functional equivalence with enhanced compliance posture. When RoHS compliance is not required, either part satisfies the electrical and mechanical requirements.

Frequently Asked Questions (FAQ)

Q: Can the DC780R-154K be used as a direct replacement for the DC780-154K?

A: Yes. The DC780R-154K is electrically and mechanically equivalent to the DC780-154K. All electrical parameters (inductance, current rating, DC resistance, saturation current) and physical dimensions are identical. The parts are interchangeable from a circuit performance perspective.

Q: What is the difference between these two parts?

A: The DC780R-154K achieves ROHS3 compliance, while the DC780-154K is RoHS non-compliant. All other specifications, including inductance value, current rating, core material, shielding configuration, mounting type, and package dimensions, are identical.

Q: Which part should I select for a new design?

A: Selection depends on regulatory requirements. If the application or manufacturing location requires RoHS compliance, select the DC780R-154K. If RoHS compliance is not required, either part satisfies the electrical and mechanical specifications.

Q: Are the physical dimensions identical?

A: Yes. Both parts have a diameter of 0.772" (19.60 mm) and a maximum seated height of 0.831" (21.10 mm). The radial, vertical cylinder package configuration is identical, ensuring PCB footprint compatibility.

Q: What is the operating temperature range for both parts?

A: Both the DC780-154K and DC780R-154K operate across -55°C to 125°C. Temperature performance is identical between the two parts.

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

A: Both parts are specified for inductance testing at 1 kHz. Self-resonant frequency data is not provided in the component specifications. Application suitability at frequencies above 1 kHz requires evaluation against specific circuit requirements.

Q: What is the saturation current for these inductors?

A: Both parts have a saturation current (Isat) of 8.9 A. The continuous current rating is 4 A, providing a saturation margin of 2.225 times the rated current.

Q: Are these parts suitable for through-hole PCB assembly?

A: Yes. Both parts are through-hole mounted components with radial, vertical cylinder package configuration, suitable for conventional PCB assembly processes.

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