SC3326F-331 Equivalent & Substitute Parts

Part Overview

The SC3326F-331 is a 330 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer, rated for 700 mA continuous current with 880mOhm maximum DC resistance. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts become necessary when the original SC3326F-331 experiences supply constraints, extended lead times, or when design requirements permit alternative core construction or shielding configurations while maintaining the specified 330 µH inductance value and ±20% tolerance.

Substiute Parts

SC3326F-331

Signal TransformerIn Stock: 1221SC3326F-331 Datasheet

Current PartRFQ

DR124-331-R

Eaton - Electronics DivisionIn Stock: 1929DR124-331-R Datasheet

MFR RecommendedRFQ

DRA124-331-R

Eaton - Electronics DivisionIn Stock: 1868DRA124-331-R Datasheet

MFR RecommendedRFQ

UP2-331-R

Eaton - Electronics DivisionIn Stock: 1970UP2-331-R Datasheet

MFR RecommendedRFQ

UP2B-331-R

Eaton - Electronics DivisionIn Stock: 1877UP2B-331-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC3326F-331 is determined by the following mandatory parameters: inductance value of 330 µH, inductance tolerance of ±20%, surface mount packaging in tape and reel format, and operating temperature range compatibility. The substitute parts listed maintain the core 330 µH inductance specification across wirewound and drum core constructions. Current rating variations are acceptable within the design envelope, provided the substitute part's current rating meets or exceeds the application requirement. DC resistance values within the specified range ensure functional equivalence. Shielding configuration (shielded versus unshielded) and core material differences are permitted substitution variables when electromagnetic interference requirements and PCB layout constraints allow such modifications.

Parameter Comparison

Engineering Selection Recommendations

DR124-331-R is suitable for applications where shielded construction is required and current rating headroom is beneficial. This part offers the highest current rating at 830 mA and maintains ROHS3 compliance with identical operating temperature range to the original SC3326F-331.

DRA124-331-R provides shielded construction with extended operating temperature range to 165°C and includes AEC-Q200 automotive qualification. This part is appropriate for high-temperature applications and automotive-grade requirements, though current rating is slightly reduced to 690 mA.

UP2-331-R maintains unshielded construction matching the SC3326F-331 configuration and provides increased current rating to 760 mA. This part is suitable for direct replacement in applications where shielding is not required and higher current capacity is acceptable.

UP2B-331-R offers unshielded drum core construction with ferrite core material and current rating of 676 mA. This part is appropriate for applications where core material variation is acceptable and operating temperature does not exceed 85°C.

Frequently Asked Questions (FAQ)

Q: Can DR124-331-R or DRA124-331-R be used as direct replacements for SC3326F-331 in unshielded applications?

A: DR124-331-R and DRA124-331-R feature shielded construction, which differs from the unshielded SC3326F-331. Shielded inductors have different electromagnetic field characteristics and occupy different PCB footprints. These parts are suitable only when shielding is required or when PCB layout permits the dimensional changes.

Q: What is the impact of DC resistance variation among substitute parts?

A: DC resistance values range from 878.3mOhm to 990mOhm across the substitute parts, compared to 880mOhm maximum for SC3326F-331. These variations affect power dissipation and thermal performance. Applications with strict power budget requirements must account for the higher DCR values in DR124-331-R and UP2-331-R.

Q: Are all substitute parts compatible with the SC3326F-331 operating temperature range?

A: UP2B-331-R has a reduced operating temperature range of -40°C to 85°C, which is narrower than the SC3326F-331 range of -40°C to 125°C. This part is not suitable for applications requiring operation above 85°C. DRA124-331-R extends the upper temperature limit to 165°C. UP2-331-R does not specify an operating temperature range.

Q: What are the physical dimension differences between substitute parts?

A: SC3326F-331 measures 0.530" L x 0.390" W x 0.315" H. DR124-331-R and DRA124-331-R are both 0.492" L x 0.492" W x 0.177" H. UP2-331-R is 0.541" L x 0.345" W x 0.231" H. UP2B-331-R is 0.550" L x 0.410" W x 0.236" H. PCB layout verification is required when substituting parts with different dimensions.

Q: Which substitute part offers the best current rating performance?

A: DR124-331-R provides the highest current rating at 830 mA, exceeding the SC3326F-331 rating of 700 mA by 130 mA. This part is suitable for applications requiring additional current capacity margin.