DC780R-123K Equivalent & Substitute Parts

Part Overview

The DC780R-123K is a 12 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc. This through-hole component is rated for 11.4 A continuous current with a maximum DC resistance of 9 mOhm and operates across the temperature range of -55°C to 125°C. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or design flexibility within the allowed parameter tolerances.

Substiute Parts

DC780R-123K

API Delevan Inc.In Stock: 1001DC780R-123K Datasheet

Current PartRFQ

1120-120K-RC

Bourns Inc.In Stock: 11901120-120K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DC780R-123K with equivalent parts is determined by strict alignment of the following critical parameters:

Electrical Parameters (Non-Negotiable):

• Inductance value: 12 µH at 1 kHz test frequency
• Inductance tolerance: ±10%
• Current rating: 11.4 A minimum
• DC resistance: 9 mOhm maximum

Mechanical Parameters (Non-Negotiable):

• Core type: Ferrite, unshielded drum core
• Mounting: Through-hole, radial vertical cylinder configuration
• Package compatibility: Radial, vertical cylinder form factor

Environmental & Compliance Parameters:

• Operating temperature range must encompass the application requirement
• RoHS3 compliance required
• REACH unaffected status

The substitute part 1120-120K-RC manufactured by Bourns Inc. meets all critical electrical and mechanical parameters. Dimensional variations within manufacturing tolerances and differences in saturation current specifications do not preclude substitution when the primary electrical performance requirements are satisfied.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: DC780R-123K

The DC780R-123K is the specified component and remains the first choice when available. It is active in production, ROHS3 compliant, and rated for the full operating temperature range of -55°C to 125°C.

Substitute Part: 1120-120K-RC

The 1120-120K-RC from Bourns Inc. is a direct electrical and mechanical equivalent. Both parts share identical inductance (12 µH), current rating (11.4 A), DC resistance (9 mOhm max), core type, and mounting configuration. Dimensional differences (0.038" diameter and 0.009" height variation) fall within standard manufacturing tolerances for through-hole radial components and do not impact PCB layout or assembly compatibility.

Temperature Range Consideration:

The 1120-120K-RC operates to 105°C maximum, compared to 125°C for the DC780R-123K. Selection of the Bourns substitute is appropriate for applications with maximum operating temperatures at or below 105°C. For applications requiring operation above 105°C, the API Delevan part is required.

Compliance Status:

Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the 1120-120K-RC replace the DC780R-123K in all applications?

A: The 1120-120K-RC is electrically and mechanically equivalent for applications operating at or below 105°C. If your application requires operation above 105°C, the DC780R-123K is required due to its 125°C maximum temperature rating.

Q: Are there dimensional compatibility issues between these parts?

A: Dimensional differences are minimal. The 1120-120K-RC is 0.038" larger in diameter and 0.009" taller. These variations are within standard manufacturing tolerances for through-hole radial inductors and do not affect PCB footprint compatibility or assembly processes.

Q: Do both parts meet RoHS and REACH requirements?

A: Yes. Both the DC780R-123K and 1120-120K-RC are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.

Q: What is the basis for substitution between these parts?

A: Substitution is based on matching inductance value (12 µH), inductance tolerance (±10%), current rating (11.4 A), DC resistance (9 mOhm max), core type (ferrite unshielded drum core), and mounting configuration (through-hole radial vertical cylinder). Both parts are tested at 1 kHz and meet these specifications exactly.

Q: Is saturation current a factor in substitution?

A: Saturation current is provided for the DC780R-123K (31.5 A) but not specified for the 1120-120K-RC. Since saturation current is not a common specification across both parts, it is not used as a substitution criterion. Selection should be based on the continuous current rating of 11.4 A, which both parts meet.

Q: Can I use these parts interchangeably on the same PCB?

A: Yes, for applications operating at or below 105°C. The through-hole radial mounting configuration and dimensional tolerances allow direct substitution without PCB redesign. Verify your application's maximum operating temperature before selecting the substitute part.