SC3326F-330 Equivalent & Substitute Parts

Part Overview

The SC3326F-330 is a 33 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer, rated for 2.5 A continuous current with a maximum DC resistance of 100 mOhm. The component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent inductance values, current ratings, and mounting specifications align within acceptable tolerance ranges, enabling direct replacement in circuit applications where the original part becomes unavailable or inventory constraints require alternative sourcing.

Substiute Parts

SC3326F-330

Signal TransformerIn Stock: 811SC3326F-330 Datasheet

Current PartRFQ

B82476B1333M100

EPCOS - TDK ElectronicsIn Stock: 1390B82476B1333M100 Datasheet

MFR RecommendedRFQ

DR124-330-R

Eaton - Electronics DivisionIn Stock: 2701DR124-330-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC3326F-330 are qualified based on the following critical parameters:

• Inductance value of 33 µH (±20% tolerance band)
• Surface mount packaging and nonstandard case dimensions
• Current rating minimum of 2.3 A (acceptable for 2.5 A rated applications with thermal margin consideration)
• DC resistance within 88–100 mOhm range
• Operating temperature range compatibility
• ROHS3 compliance and MSL 1 rating
• Inductance test frequency of 100 kHz

Two substitute parts meet these criteria: B82476B1333M100 (EPCOS - TDK Electronics) and DR124-330-R (Eaton - Electronics Division). Both maintain the 33 µH inductance specification and surface mount configuration required for direct circuit replacement.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original SC3326F-330 specification.

B82476B1333M100 offers lower DC resistance (88 mOhm) and extended operating temperature range (-55°C ~ 150°C), with AEC-Q200 automotive qualification. The 2.3 A current rating is 0.2 A below the main part specification; applications operating continuously at or above 2.3 A require thermal analysis to confirm adequate margin.

DR124-330-R provides the highest current rating (2.6 A) and saturation current (3.12 A), with shielded construction. The shielded configuration differs from the unshielded main part; applications sensitive to electromagnetic coupling or operating in high-noise environments benefit from this characteristic. Operating temperature range matches the main part (-40°C ~ 125°C).

Frequently Asked Questions (FAQ)

Q: Can B82476B1333M100 replace SC3326F-330 in all applications?

A: B82476B1333M100 is electrically compatible for inductance and DC resistance. The 2.3 A current rating is 0.2 A lower than the 2.5 A specification. Applications operating at continuous currents below 2.3 A are directly compatible. Applications requiring the full 2.5 A rating require thermal margin verification.

Q: What is the difference between shielded and unshielded configurations?

A: SC3326F-330 and B82476B1333M100 are unshielded; DR124-330-R is shielded. Shielded inductors reduce electromagnetic radiation and susceptibility to external fields. Selection depends on circuit layout and EMI requirements.

Q: Are all substitute parts surface mount compatible?

A: Yes. SC3326F-330, B82476B1333M100, and DR124-330-R are all surface mount components with nonstandard package dimensions. Physical footprint differences exist; verify PCB layout compatibility before substitution.

Q: Do substitute parts meet the same compliance standards?

A: All three parts are ROHS3 compliant, REACH unaffected, and MSL 1 rated. B82476B1333M100 includes AEC-Q200 automotive qualification, which the main part does not specify.

Q: What is the inductance tolerance band for these parts?

A: All parts carry ±20% tolerance. At 33 µH nominal, the acceptable range is 26.4 µH to 39.6 µH across all three components.