Equivalent & Substitute Parts for Bourns 1120-101K

Part Overview

The Bourns 1120-101K is a 100 µH unshielded drum core wirewound inductor rated for 4 A continuous current with 80 mOhm maximum DC resistance. This through-hole component operates across -55°C to 105°C and is designed for radial, vertical cylinder mounting. The 1120-101K is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical performance within the specified inductance, current rating, and DC resistance parameters while accommodating mechanical compatibility requirements.

Substiute Parts

1120-101K

Bourns Inc.In Stock: 10041120-101K Datasheet

Current PartRFQ

1120-101K-RC

Bourns Inc.In Stock: 28661120-101K-RC Datasheet

DirectRFQ

DC780-104K

API Delevan Inc.In Stock: 1098DC780-104K Datasheet

SimilarRFQ

IHB2BV101K

Vishay DaleIn Stock: 852IHB2BV101K Datasheet

SimilarRFQ

IHB2EB101K

Vishay DaleIn Stock: 1113IHB2EB101K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1120-101K are grouped into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Identical Electrical and Mechanical Specifications):

• 1120-101K-RC (Bourns Inc., Series 1120)

This part maintains all critical electrical parameters: 100 µH inductance at ±10% tolerance, 4 A current rating, and 80 mOhm maximum DC resistance. Physical dimensions (0.810" diameter, 0.840" maximum height) and mounting configuration are identical. The primary distinction is packaging format (bulk) and active product status with RoHS3 compliance.

Similar Substitutes (Equivalent Electrical Performance with Minor Mechanical Variations):

• DC780-104K (API Delevan Inc., Series DC780)
• IHB2BV101K (Vishay Dale, Series IHB)
• IHB2EB101K (Vishay Dale, Series IHB)

These parts meet the core electrical requirements: 100 µH inductance, ±10% tolerance, unshielded ferrite drum core construction, and through-hole radial mounting. However, they present variations in current rating, temperature range, or physical dimensions that require engineering evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select 1120-101K-RC when electrical and mechanical specifications must remain identical to the original 1120-101K design. This part is manufactured by Bourns Inc. in the same 1120 series, maintains all electrical parameters, and is classified as active with RoHS3 compliance. Bulk packaging is suitable for production environments.

For Alternative Applications: DC780-104K (API Delevan Inc.) provides equivalent electrical performance with extended operating temperature range (-55°C to 125°C) compared to the original specification. Physical dimensions are slightly smaller (0.772" diameter vs. 0.810"), which may require PCB layout verification. This part is active and suitable for applications requiring enhanced thermal performance.

IHB2BV101K and IHB2EB101K (Vishay Dale) meet core electrical requirements but are rated for 3.4 A continuous current, which is lower than the 1120-101K specification of 4 A. These parts are suitable only for applications where the actual operating current does not exceed 3.4 A. Complete dimensional and compliance data are not provided for these parts.

Frequently Asked Questions (FAQ)

Q: Can 1120-101K-RC be used as a direct replacement for 1120-101K? A: Yes. The 1120-101K-RC maintains identical electrical specifications (100 µH, ±10% tolerance, 4 A rating, 80 mOhm DCR) and mechanical dimensions (0.810" diameter, 0.840" height). The primary difference is active product status and RoHS3 compliance. No circuit redesign is required.

Q: What is the key limitation of IHB2BV101K and IHB2EB101K substitutes? A: Both Vishay Dale parts are rated for 3.4 A continuous current, compared to 4 A for the 1120-101K. These parts are suitable only for applications where operating current remains below 3.4 A. Exceeding this rating may result in thermal stress and reduced component life.

Q: How do physical dimensions affect substitution? A: DC780-104K has a slightly smaller diameter (0.772" vs. 0.810") and height (0.831" vs. 0.840"). PCB footprint and mounting hole spacing must be verified before substitution. Radial lead spacing and component clearance should be confirmed for the specific application.

Q: Is RoHS compliance a factor in selecting substitutes? A: RoHS compliance status depends on application requirements and regulatory jurisdiction. 1120-101K-RC is RoHS3 compliant, while DC780-104K is RoHS non-compliant. Verify compliance requirements for your specific end-use application before final part selection.

Q: Can DC780-104K be used in applications requiring -55°C to 105°C operation? A: Yes. DC780-104K operates across -55°C to 125°C, which exceeds the original 1120-101K specification of -55°C to 105°C. This part is suitable for the original temperature range and provides additional thermal margin for higher-temperature environments.