SC3326F-3R3 Equivalent & Substitute Parts

Part Overview

The SC3326F-3R3 is a 3.3 µH unshielded wirewound inductor manufactured by Signal Transformer, rated for 8.3 A continuous current with a maximum DC resistance of 14 mOhm. This component is designed for surface mount applications in nonstandard package configurations and operates across the industrial temperature range of -40°C to 125°C. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while meeting application requirements for current handling, inductance value, and thermal operating conditions.

Substiute Parts

SC3326F-3R3

Signal TransformerIn Stock: 855SC3326F-3R3 Datasheet

Current PartRFQ

B82477P2332M000

EPCOS - TDK ElectronicsIn Stock: 1878B82477P2332M000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC3326F-3R3 is determined by the following critical parameters:

Inductance value must match at 3.3 µH within the specified ±20% tolerance band. DC resistance must not exceed 14 mOhm maximum to maintain equivalent power dissipation characteristics. Current rating must support the application's continuous current requirements; substitute parts with lower current ratings (6.7 A versus 8.3 A) represent a functional limitation and require application-level verification. Saturation current (Isat) establishes the maximum transient current handling capability before inductance degradation occurs. Surface mount packaging and nonstandard case dimensions are required for mechanical compatibility. RoHS3 compliance and MSL 1 rating ensure regulatory and environmental compatibility with modern manufacturing processes.

The B82477P2332M000 qualifies as a substitute based on matching inductance (3.3 µH), DC resistance (14 mOhm max), tolerance (±20%), and compliance certifications. However, the reduced current rating (6.7 A continuous versus 8.3 A) and lower saturation current (7.2 A versus 10 A) represent measurable performance differences that must be evaluated against specific application current demands.

Parameter Comparison

Engineering Selection Recommendations

Both the SC3326F-3R3 and B82477P2332M000 maintain Active product status with full RoHS3 compliance and AEC-Q200 qualification (B82477P2332M000). Selection between these parts depends on application-specific current requirements and electromagnetic environment considerations.

The SC3326F-3R3 provides higher continuous current capacity (8.3 A) and saturation current (10 A), making it suitable for applications requiring maximum current headroom. The unshielded construction minimizes package height and cost.

The B82477P2332M000 offers extended operating temperature range (-55°C to 150°C versus -40°C to 125°C), shielded drum core construction for reduced electromagnetic interference, and AEC-Q200 automotive qualification. The reduced current rating (6.7 A continuous, 7.2 A saturation) requires verification against application peak and continuous current demands. The shielded design may provide advantages in noise-sensitive circuits but increases package dimensions (12.50mm x 12.50mm x 6.50mm versus 13.45mm x 9.90mm x 8.00mm).

Frequently Asked Questions (FAQ)

Q: Can B82477P2332M000 replace SC3326F-3R3 in all applications?

A: Substitution is valid only when application continuous current does not exceed 6.7 A and transient current remains below 7.2 A saturation. If the design requires the full 8.3 A continuous or 10 A saturation capability of the SC3326F-3R3, the B82477P2332M000 is not suitable.

Q: What is the impact of shielding differences?

A: The B82477P2332M000 shielded drum core construction reduces radiated electromagnetic interference compared to the unshielded SC3326F-3R3. In electromagnetically quiet environments, shielding provides no functional benefit. In noise-sensitive applications, shielding may be required for proper circuit operation.

Q: Are the package dimensions compatible?

A: Both parts use nonstandard surface mount packages with different footprints. SC3326F-3R3 measures 13.45mm x 9.90mm x 8.00mm; B82477P2332M000 measures 12.50mm x 12.50mm x 6.50mm. PCB layout and component placement must accommodate the specific package geometry of the selected part.

Q: Do both parts meet the same compliance standards?

A: Both parts are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating. The B82477P2332M000 additionally carries AEC-Q200 automotive qualification. Both are REACH unaffected and classified as EAR99 for export control purposes.

Q: What is the inductance tolerance impact on circuit performance?

A: Both parts specify ±20% inductance tolerance at 100 kHz test frequency. This tolerance band must be evaluated against circuit design margins. Applications with tight inductance requirements may require parts with tighter tolerance specifications not listed in this comparison.