SC3326F-680 Equivalent & Substitute Parts

Part Overview

The SC3326F-680 is a 68 µH unshielded wirewound inductor manufactured by Signal Transformer, rated for 1.7 A continuous current with a maximum DC resistance of 200 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 638 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and current rating category.

Substiute Parts

SC3326F-680

Signal TransformerIn Stock: 705SC3326F-680 Datasheet

Current PartRFQ

DRA124-680-R

Eaton - Electronics DivisionIn Stock: 2044DRA124-680-R Datasheet

MFR RecommendedRFQ

UP2-680-R

Eaton - Electronics DivisionIn Stock: 993UP2-680-R Datasheet

MFR RecommendedRFQ

UP2B-680-R

Eaton - Electronics DivisionIn Stock: 2200UP2B-680-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC3326F-680 is determined by the following critical parameters: inductance value of 68 µH, tolerance of ±20%, surface mount packaging, and DC resistance within acceptable operating limits. The substitute parts maintain the same inductance specification and tolerance band. Current rating and saturation current are evaluated for application compatibility; parts with equal or higher current ratings are acceptable. DC resistance values must remain within practical limits to prevent excessive power dissipation in the target circuit. Shielding configuration (shielded versus unshielded) and core material differences are noted as design considerations but do not preclude substitution when electrical parameters align. Operating temperature range and compliance certifications are documented for system-level integration requirements.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain ROHS3 compliance and MSL Level 1 rating, meeting environmental and moisture handling requirements for standard manufacturing processes. The SC3326F-680 and UP2-680-R are direct electrical equivalents, both rated for 1.7 A continuous current with comparable DC resistance values. The UP2-680-R offers lower DCR (189.8 mOhm) and is recommended when power dissipation minimization is a design priority. The UP2B-680-R provides the lowest DCR (178.7 mOhm) but operates at a reduced current rating of 1.5 A and lower maximum temperature of 85°C; this part is suitable for applications with lower current demands and standard industrial temperature ranges. The DRA124-680-R is shielded and rated to 165°C, making it appropriate for high-temperature environments or applications requiring electromagnetic shielding; however, its lower saturation current (2.369 A) and reduced continuous current rating (1.454 A) must be evaluated against circuit requirements. All parts are actively produced and available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can DRA124-680-R replace SC3326F-680 in all applications? A: DRA124-680-R maintains the same 68 µH inductance and ±20% tolerance but has a lower continuous current rating of 1.454 A compared to 1.7 A. Substitution is valid only if the application current does not exceed 1.454 A. The shielded construction of DRA124-680-R may provide benefits in noise-sensitive circuits but introduces different electromagnetic coupling characteristics.

Q: What is the primary difference between UP2-680-R and UP2B-680-R? A: Both parts are unshielded 68 µH inductors with ±20% tolerance. UP2-680-R is rated for 1.7 A continuous current with no specified upper temperature limit, while UP2B-680-R uses a drum core ferrite construction, is rated for 1.5 A, and operates to a maximum of 85°C. UP2B-680-R offers lower DC resistance (178.7 mOhm) but reduced current capacity and temperature range.

Q: Are there mechanical compatibility concerns when substituting these parts? A: All parts are surface mount components in nonstandard packages. Physical dimensions vary: SC3326F-680 measures 13.45mm × 9.90mm × 8.00mm height; DRA124-680-R measures 12.50mm × 12.50mm × 4.50mm; UP2-680-R measures 13.74mm × 8.76mm × 5.86mm; UP2B-680-R measures 13.97mm × 10.41mm × 6.00mm. PCB layout and clearance requirements must be verified for each substitution.

Q: Which substitute part has the lowest power dissipation? A: UP2B-680-R has the lowest DC resistance at 178.7 mOhm maximum, resulting in the lowest I²R losses. UP2-680-R follows at 189.8 mOhm. SC3326F-680 and DRA124-680-R are rated at 200 mOhm and 201 mOhm respectively.

Q: Is operating temperature range a limiting factor for substitution? A: Yes, if the application requires operation above 85°C, UP2B-680-R is not suitable. If operation above 125°C is required, only DRA124-680-R, rated to 165°C, is acceptable. SC3326F-680 and UP2-680-R support the standard -40°C to 125°C industrial range.