Bourns 1140-4R7M Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Bourns 1140-4R7M is a 4.7 µH unshielded drum core wirewound inductor rated for 27 A continuous current with a maximum DC resistance of 3 mOhm. This through-hole radial component is designed for applications requiring low-inductance, high-current filtering and energy storage in power conversion circuits.

The 1140 series has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and new designs requiring compatible performance characteristics.

Substiute Parts

1140-4R7M

Bourns Inc.In Stock: 9111140-4R7M Datasheet

Current PartRFQ

IHB4BV4R7M

Vishay DaleIn Stock: 974IHB4BV4R7M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Bourns 1140-4R7M must satisfy the following electrical and mechanical criteria to ensure functional equivalence:

Critical Matching Parameters:

• Inductance value: 4.7 µH (±20% tolerance acceptable)
• Current rating: minimum 27 A continuous
• DC resistance: maximum 3 mOhm
• Core construction: drum core wirewound configuration
• Shielding: unshielded design
• Mounting: through-hole radial package
• Physical form: vertical cylinder orientation

The Vishay Dale IHB4BV4R7M meets all substitution criteria. It maintains identical inductance, exceeds the current rating specification (27.6 A vs. 27 A), matches the DC resistance limit (3 mOhm max), and preserves the same core type, shielding, and mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Vishay Dale IHB4BV4R7M

The IHB4BV4R7M is the direct functional equivalent for the obsolete Bourns 1140-4R7M. Selection is based on:

• Identical inductance specification (4.7 µH)
• Current rating exceeds original specification (27.6 A vs. 27 A)
• DC resistance matches maximum allowable limit (3 mOhm)
• Identical core construction, shielding, and mounting configuration
• Same through-hole radial package form factor
• Mechanical compatibility with existing PCB layouts

The higher current rating of the IHB4BV4R7M provides additional thermal margin and saturation performance compared to the original part, making it suitable for direct replacement in existing designs without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale IHB4BV4R7M be used as a direct replacement for the Bourns 1140-4R7M?

A: Yes. Both parts share identical inductance (4.7 µH), DC resistance (3 mOhm max), core type (drum core wirewound), shielding (unshielded), and through-hole radial package configuration. The Vishay part's higher current rating (27.6 A) exceeds the original specification, providing additional performance margin.

Q: Are there any physical dimension differences between these parts?

A: The input parameters do not provide complete dimensional data for the Vishay IHB4BV4R7M. Verify mechanical compatibility (diameter and height) with your PCB layout before final selection, as package form factors may vary between manufacturers despite identical electrical specifications.

Q: What is the tolerance on the Vishay IHB4BV4R7M inductance value?

A: Inductance tolerance for the IHB4BV4R7M is not specified in the available data. Confirm tolerance specifications with the manufacturer datasheet to ensure circuit design margins are maintained.

Q: Does the higher current rating of the IHB4BV4R7M affect circuit performance?

A: No. A higher current rating indicates improved thermal performance and saturation characteristics. The part will operate within the same electrical parameters as the original 1140-4R7M when used at or below the original 27 A specification.

Q: Are there compliance or certification differences between these parts?

A: The Bourns 1140-4R7M is RoHS non-compliant. Compliance status for the Vishay IHB4BV4R7M is not provided in the input data. Verify RoHS and REACH compliance requirements for your application before final selection.