SC1608C-101 Equivalent & Substitute Parts Reference

Part Overview

The SC1608C-101 is a 100 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 720 mA continuous current with a maximum DC resistance of 480mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The part operates across the industrial temperature range of -40°C to 125°C and is RoHS3 compliant.

Substiute Parts

SC1608C-101

Signal TransformerIn Stock: 903SC1608C-101 Datasheet

Current PartRFQ

SD6030-101-R

Eaton - Electronics DivisionIn Stock: 3778SD6030-101-R Datasheet

MFR RecommendedRFQ

SD7030-101-R

Eaton - Electronics DivisionIn Stock: 1003SD7030-101-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC1608C-101 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value within ±30% tolerance band (85–115 µH acceptable range)
• Current rating equal to or greater than 720 mA
• DC resistance not exceeding 480mOhm maximum
• Saturation current (Isat) sufficient for circuit operation
• Shielded construction to maintain EMI performance
• Surface mount packaging with compatible footprint dimensions
• Operating temperature range covering -40°C to 125°C
• RoHS compliance status compatible with end-use requirements

The substitute parts SD6030-101-R and SD7030-101-R meet these criteria with inductance values of 94.4 µH and 95.5 µH respectively, both within the acceptable tolerance band. Both substitutes feature higher current ratings (760 mA and 700 mA) and improved saturation current performance compared to the original part.

Parameter Comparison

Engineering Selection Recommendations

Both SD6030-101-R and SD7030-101-R are active production parts from Eaton - Electronics Division and represent viable substitutes for the obsolete SC1608C-101. Selection between these two options depends on specific circuit requirements:

SD6030-101-R Selection Criteria:

• Inductance of 94.4 µH falls within the ±30% tolerance band of the original 100 µH specification
• Current rating of 760 mA exceeds the original 720 mA requirement
• DC resistance of 520mOhm is marginally higher than the original 480mOhm maximum
• Saturation current of 420mA provides improved headroom over the original 130mA
• Smaller footprint (6.00mm x 6.00mm) compared to SD7030-101-R
• RoHS compliant with MSL 1 rating

SD7030-101-R Selection Criteria:

• Inductance of 95.5 µH provides closer alignment to the original 100 µH specification
• Current rating of 700 mA meets the original 720 mA requirement
• DC resistance of 535mOhm is higher than the original specification
• Saturation current of 540mA provides superior performance margin
• Larger footprint (7.00mm x 7.00mm) requires PCB layout verification
• RoHS compliant with MSL 1 rating

Both substitutes maintain compliance with RoHS and REACH requirements applicable to the original part. Footprint compatibility must be verified during PCB layout migration, as both substitute parts have different dimensional profiles than the original SC1608C-101.

Frequently Asked Questions (FAQ)

Q: Can SD6030-101-R and SD7030-101-R be used interchangeably with SC1608C-101?

A: Both parts meet the core electrical substitution criteria: inductance within ±30% tolerance, current rating at or above 720 mA, and DC resistance within acceptable limits. However, footprint differences require PCB layout verification. SD6030-101-R (6.00mm x 6.00mm) and SD7030-101-R (7.00mm x 7.00mm) have different dimensions than the original SC1608C-101 (6.60mm x 4.45mm).

Q: What is the impact of the higher DC resistance in the substitute parts?

A: SD6030-101-R has 520mOhm DCR (40mOhm higher than original) and SD7030-101-R has 535mOhm DCR (55mOhm higher than original). This results in increased power dissipation. At 720 mA, the additional dissipation is approximately 29–44 mW. Circuit thermal analysis is required to confirm acceptability in the target application.

Q: Why do the substitute parts have higher saturation currents?

A: SD6030-101-R (420mA Isat) and SD7030-101-R (540mA Isat) both exceed the original 130mA saturation current specification. This indicates improved core material performance and provides greater design margin against saturation-induced inductance collapse under transient current conditions.

Q: Are there packaging differences between the main part and substitutes?

A: The original SC1608C-101 is supplied in nonstandard packaging. SD6030-101-R and SD7030-101-R are supplied in Tape & Reel (TR) format, which is standard for surface mount production environments and offers advantages in automated assembly processes.

Q: Do the substitute parts maintain the same compliance certifications?

A: Both SD6030-101-R and SD7030-101-R are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the original part's compliance profile. Both are classified as EAR99 for export control purposes.