Bourns 1120-2R7M Equivalent & Substitute Parts

Part Overview

The Bourns 1120-2R7M is a 2.7 µH unshielded drum core wirewound inductor rated for 11.4 A continuous current with 5mOhm maximum DC resistance. This through-hole radial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The 1120-2R7M carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Substiute Parts

1120-2R7M

Bourns Inc.In Stock: 6891120-2R7M Datasheet

Current PartRFQ

DC780-272L

API Delevan Inc.In Stock: 1000DC780-272L Datasheet

SimilarRFQ

IHB2EB2R7M

Vishay DaleIn Stock: 785IHB2EB2R7M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1120-2R7M are qualified based on the following critical parameters:

• Inductance value: 2.7 µH (primary electrical specification)
• Current rating: minimum 11.4 A (functional requirement)
• DC resistance: maximum 5 mOhm (performance specification)
• Core material: Ferrite (electrical characteristic)
• Shielding: Unshielded (electromagnetic environment)
• Mounting type: Through Hole (mechanical interface)
• Package style: Radial, Vertical Cylinder (form factor compatibility)

The identified substitute parts meet these core electrical and mechanical requirements, enabling direct functional replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The DC780-272L from API Delevan Inc. is an active product with improved inductance tolerance (±15% versus ±20%) and extended operating temperature range (-55°C to 125°C). This substitute provides enhanced performance margins and ongoing manufacturer support.

The IHB2EB2R7M from Vishay Dale offers increased current rating capacity (14.6 A versus 11.4 A), providing additional thermal headroom in current-limited applications while maintaining equivalent DC resistance and inductance specifications.

Both substitute parts maintain electrical and mechanical compatibility with the 1120-2R7M through identical inductance values, DC resistance ratings, core material composition, and through-hole radial package configuration. Selection between substitutes depends on application requirements for temperature range extension, tolerance improvement, or current margin enhancement.

Frequently Asked Questions (FAQ)

Q: Can the DC780-272L directly replace the 1120-2R7M in existing designs?

A: Yes. Both components share identical inductance (2.7 µH), current rating (11.4 A), DC resistance (5 mOhm max), core material (ferrite), shielding (unshielded), and through-hole radial package configuration. The DC780-272L is an active product with improved tolerance and extended temperature range.

Q: What are the physical dimension differences between substitutes?

A: The 1120-2R7M measures 0.810" diameter × 0.840" height. The DC780-272L measures 0.772" diameter × 0.831" height. Both fit standard through-hole radial mounting patterns, though dimensional variations may require PCB layout verification for tight mechanical constraints.

Q: Does the IHB2EB2R7M higher current rating (14.6 A) affect circuit compatibility?

A: No. Higher current rating indicates greater thermal capacity and saturation margin. The component remains functionally equivalent at the 1120-2R7M rated current of 11.4 A, with no adverse effects on circuit operation.

Q: Are there compliance or certification differences between the main part and substitutes?

A: All three components carry RoHS non-compliant status and REACH unaffected classification. Compliance requirements should be evaluated against specific application and regulatory standards.

Q: What inductance tolerance should be expected with each part?

A: The 1120-2R7M specifies ±20% tolerance. The DC780-272L provides tighter ±15% tolerance, reducing inductance variation in circuit designs. The IHB2EB2R7M tolerance is not specified in available data.