SDH3812-100-R Equivalent & Substitute Parts

Part Overview

The SDH3812-100-R is a 10 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division, rated for 690 mA continuous current with a maximum DC resistance of 478 mOhm. This surface mount component features a ferrite core and operates across the temperature range of -40°C to 125°C. The part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement continuity.

Substiute Parts

SDH3812-100-R

Eaton - Electronics DivisionIn Stock: 1076SDH3812-100-R Datasheet

Current PartRFQ

SRR3011-100YL

Bourns Inc.In Stock: 10154SRR3011-100YL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SDH3812-100-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 10 µH (exact match required)
• Core type: Ferrite drum core, shielded construction
• Mounting type: Surface mount
• Package footprint: 3.80mm x 3.80mm
• Operating temperature range: -40°C to 125°C minimum

Secondary Compatibility Factors:

• Current rating: Substitute must support minimum 650 mA continuous current
• DC resistance: Substitute DCR must not exceed 280 mOhm to maintain circuit performance
• Saturation current: Substitute Isat must be ≥500 mA
• Height constraint: Seated height must not exceed 1.30mm

The SRR3011-100YL from Bourns Inc. meets these substitution criteria across all primary and secondary parameters while maintaining electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SRR3011-100YL from Bourns Inc. is the qualified substitute for the obsolete SDH3812-100-R. Selection is supported by the following factors:

Electrical Compatibility: The substitute maintains the 10 µH inductance specification at 100 kHz test frequency with compatible tolerance. DC resistance is improved at 280 mOhm maximum versus 478 mOhm, reducing power dissipation. Operating temperature range is identical at -40°C to 125°C.

Mechanical Compatibility: Both components share identical footprint dimensions of 3.80mm x 3.80mm. The substitute height of 1.30mm maximum is 0.10mm greater than the original; PCB clearance must be verified for space-constrained applications.

Current Rating Consideration: The substitute is rated for 650 mA continuous current versus 690 mA for the original part. Saturation current is 500 mA for the substitute versus 880 mA for the original. Circuit designs operating at or above 650 mA continuous current or requiring saturation margins above 500 mA must be evaluated for compatibility.

Product Status and Availability: The SRR3011-100YL is actively manufactured and widely available, eliminating obsolescence risk. The part is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR3011-100YL directly replace the SDH3812-100-R in all applications?

A: Direct replacement is possible for applications where continuous current does not exceed 650 mA and saturation margin requirements are met at 500 mA Isat. The improved DC resistance of the substitute (280 mOhm vs. 478 mOhm) reduces power loss. PCB height clearance must accommodate the 1.30mm maximum seated height.

Q: What is the impact of the 30% inductance tolerance on the SRR3011-100YL versus the 20% tolerance of the SDH3812-100-R?

A: The substitute tolerance of ±30% is wider than the original ±20%. For circuits with tight inductance specifications, component selection or circuit tuning may be required. Both parts are tested at 100 kHz, ensuring consistent measurement methodology.

Q: Are there packaging differences between these components?

A: The SDH3812-100-R packaging is listed as nonstandard. The SRR3011-100YL is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly. This improves handling and automation compatibility.

Q: How does the lower saturation current of the SRR3011-100YL affect circuit design?

A: The substitute saturates at 500 mA versus 880 mA for the original. Applications requiring operation above 500 mA must verify that saturation does not degrade circuit performance. The continuous current rating of 650 mA provides operational margin below saturation for most applications.

Q: What compliance certifications apply to the substitute part?

A: The SRR3011-100YL is RoHS3 compliant and REACH unaffected. Both the original and substitute carry ECCN EAR99 and HTSUS 8504.50.8000 classifications. Moisture sensitivity level is 1 (unlimited) for both parts.