SD3112-100-R Equivalent & Substitute Parts

Part Overview

The SD3112-100-R is a 10 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 550 mA continuous current with a DC resistance of 446 mOhm and operates across the temperature range of -40°C to 125°C. The part maintains Active product status with RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining surface mount compatibility and shielded ferrite core construction.

Substiute Parts

SD3112-100-R

Eaton - Electronics DivisionIn Stock: 936SD3112-100-R Datasheet

Current PartRFQ

CDRH2D11NP-100NC

Sumida America Components Inc.In Stock: 6253CDRH2D11NP-100NC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD3112-100-R is determined by the following criteria:

Mandatory Matching Parameters:

• Inductance value: 10 µH (exact match required)
• Core material: Ferrite (shielded construction)
• Mounting type: Surface Mount
• Shielding: Shielded configuration

Performance Parameters (Substitute must meet or exceed):

• Current rating: Minimum 550 mA
• DC resistance: Lower or equal to 446 mOhm preferred
• Operating temperature range: Must encompass -40°C to 125°C or be compatible with application requirements
• Tolerance: ±30% or tighter

Compliance Parameters:

• RoHS status: Compliant
• Moisture sensitivity: MSL 1 (Unlimited)

The identified substitute CDRH2D11NP-100NC meets the mandatory electrical and mechanical parameters while offering improved current rating (650 mA) and lower DC resistance (400 mOhm maximum).

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SD3112-100-R

Use the SD3112-100-R when:

• Operating temperature must reach 125°C
• Saturation current specification of 550 mA is critical to circuit design
• Eaton component qualification is required
• Original design validation is necessary

Substitute Part: CDRH2D11NP-100NC

The CDRH2D11NP-100NC is electrically and mechanically compatible as a substitute when:

• Application operating temperature does not exceed 100°C
• Saturation current of 350 mA is acceptable for the circuit function
• Lower DC resistance (400 mOhm maximum) provides performance benefit
• Sumida components are acceptable per procurement specifications
• Compact form factor (3.00mm x 3.00mm, 1.10mm height) is advantageous

Both parts maintain Active product status, RoHS compliance, and unlimited moisture sensitivity rating. The substitute offers improved current rating (650 mA) and reduced DC resistance, resulting in lower power dissipation. However, the narrower operating temperature range and lower saturation current must be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can CDRH2D11NP-100NC replace SD3112-100-R in all applications?

A: The CDRH2D11NP-100NC is electrically compatible for inductance and current rating. However, two parameters require application-specific verification: (1) Operating temperature maximum of 100°C versus 125°C for the main part, and (2) Saturation current of 350 mA versus 550 mA. If your circuit operates within -40°C to 100°C and does not require 550 mA saturation current, substitution is valid.

Q: What is the difference in DC resistance between these parts?

A: The SD3112-100-R has 446 mOhm DC resistance, while the CDRH2D11NP-100NC has a maximum of 400 mOhm. The substitute's lower resistance reduces power dissipation and heat generation, which is beneficial for thermal performance.

Q: Are the physical dimensions compatible?

A: The CDRH2D11NP-100NC (3.00mm x 3.00mm x 1.10mm) is slightly smaller than the SD3112-100-R (3.10mm x 3.10mm x 1.20mm). Both are surface mount components with compatible footprints. The smaller substitute may provide layout advantages without requiring PCB redesign.

Q: Do both parts meet RoHS requirements?

A: Yes. The SD3112-100-R is RoHS Compliant, and the CDRH2D11NP-100NC is ROHS3 Compliant. Both meet current environmental compliance standards.

Q: What is the significance of saturation current in this comparison?

A: Saturation current (Isat) defines the current level at which the inductor's inductance begins to degrade. The SD3112-100-R saturates at 550 mA, while the CDRH2D11NP-100NC saturates at 350 mA. If your circuit requires sustained current above 350 mA, the substitute may not maintain specified inductance.

Q: Can I use the substitute if my application requires 125°C operation?

A: No. The CDRH2D11NP-100NC is rated only to 100°C maximum operating temperature. The SD3112-100-R must be used for applications requiring 125°C operation.