Equivalent & Substitute Parts for Bourns 1120-100K

Part Overview

The Bourns 1120-100K is a 10 µH unshielded drum core wirewound inductor rated for 11.4 A continuous current with 9 mOhm maximum DC resistance. This through-hole component operates across -55°C to 105°C and is designed for radial, vertical cylinder mounting. The 1120-100K carries an obsolete product status, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

1120-100K

Bourns Inc.In Stock: 9121120-100K Datasheet

Current PartRFQ

1120-100K-RC

Bourns Inc.In Stock: 10491120-100K-RC Datasheet

DirectRFQ

DC780-103K

DelevanIn Stock: 887DC780-103K Datasheet

SimilarRFQ

IHB2BV100K

Vishay DaleIn Stock: 758IHB2BV100K Datasheet

SimilarRFQ

IHB2EB100K

Vishay DaleIn Stock: 997IHB2EB100K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1120-100K are classified based on electrical and mechanical parameter alignment:

Direct Equivalent (Same Manufacturer): The 1120-100K-RC maintains identical electrical specifications (10 µH, 11.4 A, 9 mOhm DCR) and mechanical form factor. The primary distinction is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant).

Similar Equivalents (Cross-Manufacturer): The DC780-103K (Delevan) and IHB2BV100K and IHB2EB100K (Vishay Dale) meet the core electrical requirements: 10 µH inductance, 9 mOhm maximum DCR, unshielded ferrite drum core construction, and through-hole radial vertical cylinder mounting. These parts satisfy the functional substitution criteria based on inductance value, current handling, DC resistance, core material, and package type.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: The 1120-100K-RC is the preferred direct substitute. It is manufactured by Bourns Inc., maintains identical electrical and mechanical specifications, carries Active product status, and achieves ROHS3 compliance. This part provides the highest design continuity with regulatory alignment.

Secondary Recommendation: The DC780-103K (Delevan) meets all core electrical and mechanical requirements with identical inductance, current rating, and DC resistance. It extends the operating temperature range to 125°C. However, it retains RoHS non-compliant status, matching the original part's regulatory posture.

Alternative Consideration: The IHB2BV100K and IHB2EB100K (Vishay Dale) satisfy functional substitution criteria with matching inductance, DC resistance, core material, and package type. The current rating is 10 A versus 11.4 A on the main part, representing a 12% reduction in current capacity. These parts are suitable where current requirements do not exceed 10 A.

Frequently Asked Questions (FAQ)

Q: Can the 1120-100K-RC be used as a direct replacement for the 1120-100K?

A: Yes. The 1120-100K-RC is electrically and mechanically identical to the 1120-100K. Both parts deliver 10 µH inductance, 11.4 A current rating, and 9 mOhm maximum DC resistance. The 1120-100K-RC is Active status and ROHS3 compliant, providing regulatory advantages over the obsolete original.

Q: What is the key difference between the Bourns 1120-100K-RC and the Delevan DC780-103K?

A: Both parts meet the electrical specifications (10 µH, 11.4 A, 9 mOhm DCR) and share identical core material and package type. The DC780-103K operates to 125°C versus 105°C for the 1120-100K-RC. Physical dimensions differ slightly: DC780-103K measures 0.772" diameter versus 0.810" for the Bourns part. RoHS compliance status differs, with the DC780-103K remaining non-compliant.

Q: Are the Vishay Dale IHB2BV100K and IHB2EB100K suitable replacements?

A: These parts meet the inductance, DC resistance, core material, and package requirements. The current rating is 10 A, which is 1.4 A lower than the 1120-100K's 11.4 A rating. Substitution is valid only where circuit current requirements do not exceed 10 A.

Q: What packaging options are available for these substitutes?

A: The 1120-100K-RC is supplied in Bulk packaging. The DC780-103K is also available in Bulk. Packaging specifications for the Vishay Dale parts are not detailed in the available data.

Q: Does operating temperature range affect substitution decisions?

A: The DC780-103K extends the upper operating limit to 125°C compared to 105°C for the 1120-100K and 1120-100K-RC. If the application operates above 105°C, the DC780-103K provides additional thermal margin. For applications within -55°C to 105°C, all recommended substitutes are suitable.