SD3110-100-R Equivalent & Substitute Parts

Part Overview

The SD3110-100-R is a 10 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division, rated for 440 mA continuous current with 505 mOhm DC resistance. This surface mount component operates across the temperature range of -40°C to 125°C and features ferrite core construction with ±30% inductance tolerance.

The SD3110-100-R is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing design requirements, system maintenance, and production continuity where this inductor is specified in existing applications.

Substiute Parts

SD3110-100-R

Eaton - Electronics DivisionIn Stock: 842SD3110-100-R Datasheet

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SD3114-100-R

Eaton - Electronics DivisionIn Stock: 8435SD3114-100-R Datasheet

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SRU3011-100Y

Bourns Inc.In Stock: 2217SRU3011-100Y Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SD3110-100-R is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance value: 10 µH (fixed requirement)
• Inductance tolerance: ±30% (fixed requirement)
• Operating temperature range: -40°C to 125°C (fixed requirement)
• Core material: Ferrite shielded drum core (fixed requirement)
• Mounting type: Surface mount (fixed requirement)

Allowable Parameter Variations:

• Current rating: Substitute must equal or exceed 440 mA
• Saturation current (Isat): Substitute must equal or exceed 470 mA
• DC resistance (DCR): Substitute should be comparable or lower to maintain circuit performance
• Physical dimensions: Substitute footprint must be compatible with PCB layout constraints

Identified Substitutes:

The SD3114-100-R (Eaton - Electronics Division) qualifies as a direct substitute with improved electrical performance: higher current rating (570 mA vs. 440 mA), higher saturation current (780 mA vs. 470 mA), and lower DC resistance (458 mOhm vs. 505 mOhm). Physical footprint remains identical (3.10 × 3.10 mm), though height increases from 1.00 mm to 1.40 mm.

The SRU3011-100Y (Bourns Inc.) qualifies as a functional substitute with comparable current rating (400 mA vs. 440 mA) and superior DC resistance (340 mOhm vs. 505 mOhm). Physical dimensions differ slightly (3.50 × 3.30 mm footprint, 1.20 mm height), requiring PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

SD3114-100-R (Eaton - Electronics Division):

The SD3114-100-R is the preferred substitute when direct compatibility with existing PCB layouts is required. This component maintains identical footprint dimensions (3.10 × 3.10 mm) to the SD3110-100-R, eliminating the need for PCB redesign. The SD3114-100-R carries active product status and holds RoHS Compliant certification, ensuring long-term availability and regulatory compliance. Electrical performance exceeds the original specification: current rating increases to 570 mA (130% of original), saturation current reaches 780 mA (166% of original), and DC resistance decreases to 458 mOhm (91% of original). Height increases from 1.00 mm to 1.40 mm; clearance verification is required for applications with height constraints.

SRU3011-100Y (Bourns Inc.):

The SRU3011-100Y is suitable for applications where PCB layout modification is acceptable. This component carries active product status and holds ROHS3 Compliant certification. DC resistance is significantly lower at 340 mOhm (67% of original), providing reduced power dissipation. Current rating is 400 mA, which is below the original 440 mA specification; this component is suitable only for applications where actual operating current does not exceed 400 mA. Saturation current is 350 mA, below the original 470 mA specification. Physical footprint differs (3.50 × 3.30 mm vs. 3.10 × 3.10 mm), requiring PCB layout verification and potential redesign.

Frequently Asked Questions (FAQ)

Q: Can the SD3114-100-R directly replace the SD3110-100-R without PCB modification?

A: The SD3114-100-R maintains identical footprint dimensions (3.10 × 3.10 mm), allowing direct placement on existing PCB layouts. Height increases from 1.00 mm to 1.40 mm; clearance above the component must be verified to ensure no interference with adjacent components or enclosure constraints.

Q: What is the primary difference between the SD3114-100-R and SRU3011-100Y substitutes?

A: The SD3114-100-R maintains the original footprint and offers superior current handling (570 mA vs. 400 mA for the SRU3011-100Y). The SRU3011-100Y provides lower DC resistance (340 mOhm vs. 458 mOhm) but requires PCB layout modification due to different footprint dimensions (3.50 × 3.30 mm).

Q: Is the SRU3011-100Y suitable for all applications using the SD3110-100-R?

A: The SRU3011-100Y is suitable only for applications where the actual operating current does not exceed 400 mA. The original SD3110-100-R is rated for 440 mA; applications operating at or above this current level require the SD3114-100-R substitute. Additionally, saturation current of the SRU3011-100Y is 350 mA, below the original 470 mA specification.

Q: What compliance certifications apply to the substitute parts?

A: The SD3114-100-R holds RoHS Compliant and REACH Unaffected certifications. The SRU3011-100Y holds ROHS3 Compliant and REACH Unaffected certifications. Both substitutes meet current regulatory requirements for electronic component manufacturing and use.

Q: How does DC resistance affect circuit performance?

A: DC resistance (DCR) determines power dissipation in the inductor. Lower DCR reduces heat generation and improves circuit efficiency. The SD3114-100-R (458 mOhm) and SRU3011-100Y (340 mOhm) both offer lower DCR than the original SD3110-100-R (505 mOhm), resulting in reduced power loss.

Q: Are all three inductors tested at the same frequency?

A: Yes. The SD3110-100-R, SD3114-100-R, and SRU3011-100Y are all tested at 100 kHz for inductance verification, ensuring consistent measurement methodology across all components.

Q: What is the moisture sensitivity level for these inductors?

A: All three inductors carry Moisture Sensitivity Level (MSL) 1, classified as Unlimited. This designation indicates the components are not sensitive to moisture absorption during storage and handling, eliminating the need for special moisture control measures or baking procedures prior to assembly.