SD3118-100-R Equivalent & Substitute Parts

Part Overview

The SD3118-100-R is a 10 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 750 mA continuous current with a DC resistance of 295 mOhm and operates across the temperature range of -40°C to 125°C. The part is RoHS compliant and currently active in production with substantial inventory availability. Substitute parts are identified when equivalent inductance values, current ratings, and shielding characteristics align within acceptable tolerance parameters, enabling design flexibility and supply chain optimization.

Substiute Parts

SD3118-100-R

Eaton - Electronics DivisionIn Stock: 1742SD3118-100-R Datasheet

Current PartRFQ

SRU3017-100Y

Bourns Inc.In Stock: 21316SRU3017-100Y Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD3118-100-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 10 µH (within ±30% tolerance specification)
• Core type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration
• Mounting: Surface mount technology
• Operating temperature range: -40°C to 125°C minimum

Secondary Compatibility Factors:

• Current rating: Minimum 750 mA continuous current capability
• Saturation current (Isat): Minimum 900 mA
• DC resistance: Acceptable range determined by circuit design requirements
• RoHS compliance status

The substitute part SRU3017-100Y meets all primary matching criteria with equivalent inductance, core material, shielding, and temperature range. The substitute demonstrates higher current rating (850 mA) and lower DC resistance (120 mOhm), providing enhanced performance characteristics within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

SD3118-100-R Selection Basis: The SD3118-100-R remains the primary component choice when Eaton supply chain preference is established or when the specific DC resistance of 295 mOhm is a circuit design requirement. The part is active in production with 1677 pieces in current inventory and maintains full RoHS compliance.

SRU3017-100Y Substitution Basis: The SRU3017-100Y qualifies as a direct substitute when supply constraints affect SD3118-100-R availability or when the lower DC resistance (120 mOhm) provides circuit performance benefits. The substitute offers higher continuous current rating (850 mA versus 750 mA) and maintains ROHS3 compliance with 21300 pieces in inventory. Physical dimensions differ slightly (3.50 x 3.30 mm versus 3.10 x 3.10 mm, height 2.00 mm versus 1.80 mm), requiring PCB layout verification for space-constrained applications.

Both parts operate identically across the -40°C to 125°C temperature range and share ferrite core construction with shielding. Selection between these parts depends on DC resistance requirements, physical footprint constraints, and inventory availability rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Can SRU3017-100Y replace SD3118-100-R in all applications?

A: Substitution is valid when circuit design does not depend on the specific 295 mOhm DC resistance value of the SD3118-100-R. The SRU3017-100Y provides lower resistance (120 mOhm), which reduces power dissipation but may alter circuit impedance characteristics. PCB layout must accommodate the slightly larger physical dimensions (3.50 x 3.30 x 2.00 mm versus 3.10 x 3.10 x 1.80 mm).

Q: What are the key differences in electrical performance?

A: Both inductors maintain 10 µH inductance at 100 kHz with ±30% tolerance. The SRU3017-100Y provides 100 mA higher continuous current rating (850 mA versus 750 mA) and significantly lower DC resistance (120 mOhm versus 295 mOhm). The SD3118-100-R exhibits higher saturation current (900 mA versus 470 mA), which may be relevant in applications requiring saturation margin.

Q: Are there packaging differences?

A: Yes. The SD3118-100-R is supplied in Tape & Reel (TR) format, while the SRU3017-100Y is available in Cut Tape (CT) and Digi-Reel® packaging. Packaging selection depends on assembly process requirements and volume specifications.

Q: Do both parts meet RoHS requirements?

A: Both parts are RoHS compliant. The SD3118-100-R meets RoHS standard, and the SRU3017-100Y meets the more recent ROHS3 standard. Both are suitable for applications requiring RoHS compliance.

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

A: Both the SD3118-100-R and SRU3017-100Y are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: How do the physical dimensions affect PCB design?

A: The SD3118-100-R occupies a smaller footprint (3.10 x 3.10 mm) with lower profile (1.80 mm height). The SRU3017-100Y requires slightly more board space (3.50 x 3.30 mm) and additional height (2.00 mm). Space-constrained designs may require the SD3118-100-R, while the SRU3017-100Y may be preferred when DC resistance reduction is beneficial.