Equivalent & Substitute Parts for 1120-4R7M

Part Overview

The Bourns 1120-4R7M is a 4.7 µH unshielded drum core wirewound inductor rated for 11.4 A continuous current with a maximum DC resistance of 5 mOhm. This through-hole radial component operates across a temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The 1120-4R7M is classified as obsolete. Locating equivalent or substitute parts is necessary to support ongoing production, maintenance, and repair of systems utilizing this component. Substitute parts must maintain electrical performance within the specified tolerance and current rating parameters while meeting modern compliance requirements where applicable.

Substiute Parts

1120-4R7M

Bourns Inc.In Stock: 7261120-4R7M Datasheet

Current PartRFQ

1120-4R7M-RC

Bourns Inc.In Stock: 14071120-4R7M-RC Datasheet

DirectRFQ

DC780-472L

API Delevan Inc.In Stock: 1064DC780-472L Datasheet

SimilarRFQ

IHB2BV4R7M

Vishay DaleIn Stock: 959IHB2BV4R7M Datasheet

SimilarRFQ

IHB2EB4R7M

Vishay DaleIn Stock: 1073IHB2EB4R7M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1120-4R7M are classified based on electrical and mechanical compatibility. The primary substitution criteria are:

• Inductance Value: Must be 4.7 µH
• Current Rating: Must support minimum 11.4 A continuous current
• DC Resistance: Must not exceed 5 mOhm maximum
• Core Type: Ferrite drum core construction
• Mounting: Through-hole radial configuration
• Package Geometry: Radial, vertical cylinder form factor compatible with original footprint

Substitute parts are grouped into two categories:

Direct Substitutes maintain identical electrical specifications and packaging from the same manufacturer series, with improved product status or compliance.

Similar Substitutes meet all critical electrical parameters (inductance, current rating, DC resistance) and physical mounting requirements but may originate from different manufacturers or series, with minor variations in tolerance, saturation current, or operating temperature range that do not compromise circuit functionality.

Parameter Comparison

Engineering Selection Recommendations

1120-4R7M-RC is the primary recommended substitute. This part is manufactured by Bourns Inc. in the same 1120 series and maintains identical electrical specifications and physical dimensions as the original 1120-4R7M. The 1120-4R7M-RC carries active product status and achieves ROHS3 compliance, making it suitable for new designs and systems requiring modern regulatory adherence. Inventory availability is higher than the original part.

DC780-472L (API Delevan Inc.) is a functionally equivalent alternative. This part meets all critical electrical parameters and maintains through-hole radial mounting compatibility. The DC780-472L offers improved inductance tolerance (±15% versus ±20%) and an extended operating temperature range (-55°C to 125°C). Physical dimensions are within acceptable tolerance of the original part. This substitute is appropriate where API Delevan components are already qualified in the system design.

IHB2EB4R7M and IHB2BV4R7M (Vishay Dale) are functionally compatible alternatives. Both parts deliver the required 4.7 µH inductance, 5 mOhm maximum DC resistance, and through-hole radial mounting. These inductors feature higher current ratings (14.6 A versus 11.4 A), providing additional design margin. Selection of Vishay Dale parts is appropriate where Vishay components are established in the supply chain or where the enhanced current rating provides system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can the 1120-4R7M-RC be used as a direct replacement for the 1120-4R7M?

A: Yes. The 1120-4R7M-RC is electrically and mechanically identical to the 1120-4R7M, with identical inductance (4.7 µH), current rating (11.4 A), DC resistance (5 mOhm), and physical dimensions. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit redesign is required.

Q: What are the physical dimension differences between substitute parts?

A: The 1120-4R7M and 1120-4R7M-RC share identical dimensions: 0.810" diameter (20.57 mm) and 0.840" maximum seated height (21.34 mm). The DC780-472L has slightly smaller dimensions (0.772" diameter, 0.831" height) but remains compatible with through-hole radial mounting footprints designed for the original part.

Q: Are there tolerance differences between the main part and substitutes?

A: The 1120-4R7M and 1120-4R7M-RC both specify ±20% inductance tolerance. The DC780-472L offers tighter tolerance at ±15%. The Vishay Dale parts (IHB2EB4R7M and IHB2BV4R7M) do not specify tolerance in the provided data. For applications requiring controlled inductance tolerance, the DC780-472L provides improved specification.

Q: Do substitute parts support the same operating temperature range?

A: The 1120-4R7M and 1120-4R7M-RC operate from -55°C to 105°C. The DC780-472L extends this range to -55°C to 125°C, providing additional thermal margin. Operating temperature specifications for the Vishay Dale parts are not provided in the available data.

Q: Which substitute part has the highest current rating?

A: The Vishay Dale parts (IHB2EB4R7M and IHB2BV4R7M) are rated for 14.6 A continuous current, compared to 11.4 A for the original 1120-4R7M and its direct substitute 1120-4R7M-RC. This higher rating provides additional design margin in current-limited applications.

Q: Are all substitute parts RoHS compliant?

A: The 1120-4R7M-RC is ROHS3 compliant. The DC780-472L is RoHS non-compliant. RoHS compliance status for the Vishay Dale parts is not specified in the provided data. For applications requiring RoHS compliance, the 1120-4R7M-RC is the appropriate selection.

Q: Can these inductors be used interchangeably in the same PCB footprint?

A: Yes, all substitute parts maintain through-hole radial mounting configuration and are compatible with PCB footprints designed for the 1120-4R7M. Physical dimension variations between the DC780-472L and other parts are minor and do not affect footprint compatibility.