SC3326F-220 Equivalent & Substitute Parts

Part Overview

The SC3326F-220 is a 22 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer. Rated for 3 A continuous current with a maximum DC resistance of 67mOhm, this component is designed for applications requiring fixed inductance in compact form factors. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts become necessary when inventory constraints, lead time requirements, or specific application parameters necessitate alternative sourcing while maintaining functional equivalence.

Substiute Parts

SC3326F-220

Signal TransformerIn Stock: 962SC3326F-220 Datasheet

Current PartRFQ

UP2B-220-R

Eaton - Electronics DivisionIn Stock: 16278UP2B-220-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The UP2B-220-R from Eaton - Electronics Division qualifies as a substitute based on the following critical parameters:

Inductance equivalence: Both parts specify 22 µH at 100 kHz with ±20% tolerance, ensuring functional compatibility in circuits designed for this inductance value.

Unshielded configuration: Both parts maintain unshielded construction, preserving electromagnetic characteristics in the application environment.

Surface mount packaging: Both components use surface mount technology with nonstandard package dimensions, compatible with standard SMD assembly processes.

Compliance alignment: Both parts achieve ROHS3 compliance and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting identical regulatory and handling requirements.

Current rating consideration: The substitute part specifies 2.8 A continuous current versus the main part's 3 A rating. This represents a 6.7% reduction in current capacity. The substitute's saturation current of 2 A is lower than the main part's 5.2 A saturation point, indicating reduced headroom for transient current conditions.

DC resistance: The substitute's 61.7mOhm maximum DCR is lower than the main part's 67mOhm, providing improved efficiency characteristics.

Operating temperature: The substitute operates across -40°C to 85°C, a 40°C reduction in upper temperature limit compared to the main part's 125°C maximum.

Parameter Comparison

Engineering Selection Recommendations

Selection between SC3326F-220 and UP2B-220-R depends on application-specific current and temperature requirements:

Use SC3326F-220 when applications require the full 3 A continuous current rating, saturation current headroom of 5.2 A, or operating temperatures exceeding 85°C up to 125°C. This part provides maximum thermal and current margin for demanding environments.

Use UP2B-220-R when circuit design operates within 2.8 A continuous current limits, saturation events remain below 2 A, and maximum operating temperature does not exceed 85°C. This substitute offers lower DC resistance (61.7mOhm versus 67mOhm) and reduced height profile (6.00mm versus 8.00mm), beneficial for space-constrained layouts and efficiency-critical applications.

Both parts maintain identical inductance specification, tolerance, shielding configuration, surface mount compatibility, and regulatory compliance (ROHS3, MSL 1). Footprint differences are minor; the substitute is slightly larger in length and width but significantly lower in height.

Frequently Asked Questions (FAQ)

Q: Can UP2B-220-R replace SC3326F-220 in all applications?

A: Substitution is valid only when circuit design operates within the UP2B-220-R's current and temperature limits. The 2.8 A continuous rating and 85°C maximum temperature represent hard constraints. If the application requires 3 A continuous current or temperatures above 85°C, the substitute is not suitable.

Q: What is the significance of the saturation current difference?

A: Saturation current (Isat) indicates the current level at which the inductor's inductance begins to degrade. SC3326F-220 maintains inductance to 5.2 A, while UP2B-220-R saturates at 2 A. Applications experiencing transient current spikes or sustained currents above 2 A require the main part to prevent inductance collapse.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: Both parts use surface mount technology with similar footprints. UP2B-220-R is 3.9% longer and 5.2% wider but 25% shorter in height. Verify that PCB land patterns accommodate the slightly larger length and width, and confirm that the reduced height does not create clearance issues with adjacent components.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both SC3326F-220 and UP2B-220-R are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH unaffected. They meet identical environmental and handling standards.

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

A: The UP2B-220-R's 61.7mOhm DCR versus SC3326F-220's 67mOhm DCR represents a 7.8% reduction in resistive losses. This improves efficiency and reduces heat generation, beneficial in power-sensitive applications. However, this advantage applies only within the substitute's current and temperature operating limits.

Q: Can the substitute handle the same frequency range?

A: Both parts are specified at 100 kHz inductance test frequency. Self-resonant frequency data is not provided for either part. Verify frequency response characteristics with manufacturer datasheets if the application operates at frequencies significantly different from 100 kHz.