Equivalent & Substitute Parts for Bourns 1120-182K

Part Overview

The Bourns 1120-182K is a 1.8 mH unshielded drum core wirewound inductor rated for 800 mA with a maximum DC resistance of 1.39 Ohm. This component operates across a temperature range of -55°C to 105°C and is mounted through-hole in a radial, vertical cylinder package. The part is classified as obsolete, making identification of equivalent substitutes essential for ongoing design support and procurement continuity.

Substiute Parts

1120-182K

Bourns Inc.In Stock: 9811120-182K Datasheet

Current PartRFQ

DC780-185K

API Delevan Inc.In Stock: 1066DC780-185K Datasheet

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IHB2BV182K

Vishay DaleIn Stock: 1153IHB2BV182K Datasheet

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IHB2EB182K

Vishay DaleIn Stock: 811IHB2EB182K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Bourns 1120-182K are qualified based on the following electrical and mechanical parameters:

• Inductance value of 1.8 mH with ±10% tolerance
• Current rating of 800 mA minimum
• DC resistance of 1.39 Ohm maximum
• Ferrite drum core construction
• Unshielded configuration
• Through-hole radial, vertical cylinder mounting
• Inductance measured at 1 kHz

Three substitute parts meet these criteria: DC780-185K (API Delevan Inc.), IHB2BV182K (Vishay Dale), and IHB2EB182K (Vishay Dale). All three maintain electrical equivalence across the critical parameters that define functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan DC780-185K is the primary substitute for the Bourns 1120-182K. This part maintains full electrical equivalence across all critical parameters and carries active product status, ensuring long-term availability and supply chain stability. The DC780-185K also extends the operating temperature range to -55°C to 125°C, providing additional thermal margin compared to the original part.

The Vishay Dale IHB2BV182K and IHB2EB182K are secondary substitutes that meet the core electrical and mechanical requirements. Both parts are available in inventory and maintain the same inductance, current rating, and DC resistance specifications. Selection between these options should be based on procurement availability and lead time requirements.

All three substitute parts are RoHS non-compliant and REACH unaffected, matching the compliance profile of the original Bourns component.

Frequently Asked Questions (FAQ)

Q: Can the DC780-185K be used as a direct replacement for the 1120-182K?

A: Yes. The DC780-185K meets all electrical and mechanical substitution criteria, including inductance value, current rating, DC resistance, core type, and mounting configuration. The extended operating temperature range (-55°C to 125°C versus -55°C to 105°C) provides additional design margin.

Q: What are the physical dimension differences between the main part and substitutes?

A: The Bourns 1120-182K has a diameter of 0.810" (20.57 mm) and seated height of 0.840" (21.34 mm). The API Delevan DC780-185K has a diameter of 0.772" (19.60 mm) and seated height of 0.831" (21.10 mm). These dimensional variations are within typical through-hole radial component tolerances and should not affect PCB layout compatibility for standard mounting footprints.

Q: Are the Vishay Dale IHB2BV182K and IHB2EB182K interchangeable with each other?

A: Both Vishay Dale parts maintain identical electrical specifications (1.8 mH, 800 mA, 1.39 Ohm DCR) and package configuration. Selection between them should be based on inventory availability and supplier preference.

Q: What is the saturation current specification for these inductors?

A: The API Delevan DC780-185K specifies a saturation current (Isat) of 2.6 A. Saturation current data is not provided for the original Bourns part or the Vishay Dale substitutes.

Q: Are all substitute parts suitable for the same PCB assembly process?

A: Yes. All parts are through-hole mounted in radial, vertical cylinder configuration and are compatible with standard wave soldering and manual insertion assembly processes.