SD3110-2R2-R Equivalent & Substitute Parts

Part Overview

The SD3110-2R2-R is a 2.2 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 820 mA continuous current with a DC resistance of 149 mOhm and operates across the temperature range of -40°C to 125°C. The part is classified as obsolete, making identification of suitable equivalent components essential for ongoing design support and production continuity. Substitute parts must maintain the 2.2 µH inductance specification, ferrite core construction, shielded configuration, and surface mount compatibility while accommodating the electrical performance requirements of the original application.

Substiute Parts

SD3110-2R2-R

Eaton - Electronics DivisionIn Stock: 1263SD3110-2R2-R Datasheet

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SD3114-2R2-R

Eaton - Electronics DivisionIn Stock: 876SD3114-2R2-R Datasheet

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SRU3011-2R2Y

Bourns Inc.In Stock: 1224SRU3011-2R2Y Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SD3110-2R2-R are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Core Substitution Criteria:

• Inductance value: 2.2 µH (fixed requirement)
• Inductance tolerance: ±30% (matching specification)
• Core material: Ferrite (shielded drum core construction)
• Shielding: Shielded configuration (electromagnetic containment requirement)
• Mounting: Surface mount technology
• Operating temperature: -40°C to 125°C (full range compatibility)
• Test frequency: 100 kHz (measurement standard)

Electrical Performance Allowances: Substitute parts may vary in current rating, saturation current, and DC resistance provided the application's maximum current demand does not exceed the substitute part's current rating specification. Lower DC resistance values represent improved electrical performance and are acceptable substitutes. Higher current ratings provide design margin and are permissible.

Identified Substitutes:

1. SD3114-2R2-R (Eaton - Electronics Division): Active product with improved current rating (1.17 A vs. 820 mA) and lower DC resistance (110 mOhm vs. 149 mOhm). Identical inductance and core specifications. Tape & Reel packaging available.

2. SRU3011-2R2Y (Bourns Inc.): Active product with comparable current rating (920 mA vs. 820 mA) and significantly lower DC resistance (80 mOhm vs. 149 mOhm). Identical inductance and ferrite core specifications. Includes measured Q factor and self-resonant frequency data. RoHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

SD3114-2R2-R Selection Criteria: The SD3114-2R2-R is an active product from the same manufacturer (Eaton - Electronics Division) with identical inductance and core specifications. This part offers improved electrical performance through higher current rating (1.17 A) and reduced DC resistance (110 mOhm). The SD3114-2R2-R maintains the same footprint dimensions (3.10mm x 3.10mm) as the original SD3110-2R2-R, with a marginal height increase (1.40 mm vs. 1.00 mm). RoHS compliance certification is available. This substitute is suitable for applications where the original 820 mA rating is adequate and the increased height can be accommodated in the PCB layout.

SRU3011-2R2Y Selection Criteria: The SRU3011-2R2Y is an active product from Bourns Inc. with identical inductance value and ferrite core construction. This part provides superior electrical performance with the lowest DC resistance (80 mOhm) among available substitutes and a current rating (920 mA) that exceeds the original specification. The SRU3011-2R2Y includes measured Q factor (7 @ 7.96 MHz) and self-resonant frequency (150 MHz) data. RoHS3 and REACH compliance certifications are provided. The footprint is slightly larger (3.50mm x 3.30mm) with a height of 1.20 mm. This substitute is appropriate for applications requiring enhanced electrical performance and comprehensive compliance documentation.

Substitution Feasibility: Both substitute parts maintain the 2.2 µH inductance specification, ferrite shielded core construction, and surface mount configuration. Current ratings of both substitutes equal or exceed the original 820 mA specification. DC resistance values are lower in both cases, representing improved performance. All parts operate across the identical temperature range (-40°C to 125°C). Footprint differences must be evaluated against specific PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the SD3114-2R2-R directly replace the SD3110-2R2-R in all applications?

A: The SD3114-2R2-R maintains identical inductance (2.2 µH), core material (ferrite), shielding, and mounting type. The current rating is higher (1.17 A vs. 820 mA) and DC resistance is lower (110 mOhm vs. 149 mOhm), representing improved electrical performance. The primary consideration is the height increase from 1.00 mm to 1.40 mm, which must be verified against PCB clearance requirements. Both parts operate across the same temperature range and are tested at 100 kHz.

Q: What are the key differences between the SD3114-2R2-R and SRU3011-2R2Y?

A: Both parts provide 2.2 µH inductance with ferrite shielded cores and surface mount configuration. The SRU3011-2R2Y offers lower DC resistance (80 mOhm vs. 110 mOhm) and includes measured Q factor and self-resonant frequency specifications. The SRU3011-2R2Y footprint is slightly larger (3.50mm x 3.30mm vs. 3.10mm x 3.10mm). The SD3114-2R2-R is from the same manufacturer as the original part (Eaton). The SRU3011-2R2Y provides RoHS3 and REACH compliance certifications.

Q: Are there any height constraints when substituting these parts?

A: The original SD3110-2R2-R has a maximum seated height of 1.00 mm. The SD3114-2R2-R increases to 1.40 mm, and the SRU3011-2R2Y is 1.20 mm. PCB layout and component clearance requirements must be evaluated to determine if the increased height is acceptable. Footprint dimensions also differ slightly between the SRU3011-2R2Y (3.50mm x 3.30mm) and the original (3.10mm x 3.10mm).

Q: Do the substitute parts have RoHS compliance?

A: The SD3114-2R2-R is RoHS Compliant. The SRU3011-2R2Y is RoHS3 Compliant and also carries REACH Unaffected status. The original SD3110-2R2-R does not specify RoHS status.

Q: What is the significance of the lower DC resistance in the substitute parts?

A: Lower DC resistance reduces power dissipation in the inductor. The SRU3011-2R2Y (80 mOhm) and SD3114-2R2-R (110 mOhm) both provide lower resistance than the original SD3110-2R2-R (149 mOhm). This results in reduced heat generation and improved efficiency in the circuit. The lower resistance is a performance improvement and does not affect substitution compatibility.

Q: Can I use the SRU3011-2R2Y if my application requires the exact same footprint as the SD3110-2R2-R?

A: No. The SRU3011-2R2Y footprint (3.50mm x 3.30mm) differs from the original SD3110-2R2-R (3.10mm x 3.10mm). The SD3114-2R2-R maintains the identical footprint dimensions (3.10mm x 3.10mm) and is the appropriate choice for applications with strict footprint requirements.

Q: What is the current saturation specification and why does it matter?

A: Current saturation (Isat) indicates the current level at which the inductor's inductance begins to degrade significantly. The original SD3110-2R2-R has Isat of 1 A, the SD3114-2R2-R has 1.74 A, and the SRU3011-2R2Y has 900 mA. For applications operating near or above the saturation current, the SD3114-2R2-R provides the highest margin. The SRU3011-2R2Y saturation current is slightly below the original specification and must be evaluated against actual circuit current demands.