SC3316F-680 Equivalent & Substitute Parts

Part Overview

The SC3316F-680 is a 68 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer, rated for 1.5 A continuous current with a maximum DC resistance of 220 mOhm. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are necessary when the original part becomes unavailable, when design requirements demand alternative electrical characteristics such as higher current ratings or lower DC resistance, or when alternative shielding configurations are required for specific circuit applications.

Substiute Parts

SC3316F-680

Signal TransformerIn Stock: 771SC3316F-680 Datasheet

Current PartRFQ

DRA124-680-R

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

MFR RecommendedRFQ

P0751.683NLT

Pulse ElectronicsIn Stock: 1669P0751.683NLT 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 SC3316F-680 is determined by the following critical parameters: inductance value (68 µH), tolerance (±20%), mounting type (surface mount), and inductance test frequency (100 kHz). All substitute parts must maintain the same inductance specification and tolerance band. Current rating, DC resistance, saturation current, shielding configuration, and operating temperature range are secondary parameters that may vary within acceptable design margins depending on circuit requirements. All substitute parts listed are wirewound inductors with surface mount packaging and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain the core inductance specification of 68 µH at ±20% tolerance and are tested at 100 kHz. Selection among substitutes depends on specific circuit requirements:

DRA124-680-R offers shielded construction with the highest saturation current (2.369 A) and extended operating temperature range to 165°C, suitable for applications requiring electromagnetic isolation and higher thermal headroom.

P0751.683NLT provides unshielded construction with current rating and saturation current matching the original SC3316F-680, with slightly higher DC resistance (240 mOhm) and operating temperature to 130°C.

UP2-680-R delivers the highest continuous current rating (1.7 A) with the lowest DC resistance (189.8 mOhm Max) among unshielded options, though saturation current is reduced to 1.2 A and operating temperature is not specified.

UP2B-680-R combines drum core ferrite construction with the lowest DC resistance (178.7 mOhm Max) and matches the original 1.5 A current rating, but operates only to 85°C maximum temperature. All parts are RoHS3 compliant and Active product status.

Frequently Asked Questions (FAQ)

Q: Can DRA124-680-R replace SC3316F-680 in all applications? A: DRA124-680-R is electrically compatible as a substitute, maintaining the same 68 µH inductance and ±20% tolerance. However, DRA124-680-R is shielded while SC3316F-680 is unshielded. This difference affects electromagnetic coupling characteristics. Shielded construction reduces radiated emissions and susceptibility to external fields. Substitution is valid only if the circuit design does not depend on the unshielded coupling properties of the original part.

Q: What is the significance of DC resistance differences among substitutes? A: DC resistance directly affects power dissipation and thermal performance. Lower DC resistance (UP2B-680-R at 178.7 mOhm, UP2-680-R at 189.8 mOhm) reduces I²R losses compared to the original SC3316F-680 (220 mOhm). Higher DC resistance (P0751.683NLT at 240 mOhm) increases power dissipation. Selection depends on thermal budget and efficiency requirements of the application.

Q: Are saturation current differences critical for substitution? A: Saturation current (Isat) defines the current level at which inductance begins to degrade. The original SC3316F-680 saturates at 1.4 A. DRA124-680-R offers higher saturation margin (2.369 A), while UP2-680-R and UP2B-680-R saturate at 1.2 A. For circuits operating near rated current, lower saturation current may cause inductance collapse. Verify circuit peak current requirements against Isat specifications.

Q: What are the package dimension implications? A: All parts are surface mount with nonstandard packages. Physical dimensions vary: SC3316F-680 measures 13.45mm × 9.90mm × 5.21mm height; DRA124-680-R is 12.50mm × 12.50mm × 4.50mm; P0751.683NLT is 12.95mm × 9.40mm × 5.46mm; UP2-680-R is 13.74mm × 8.76mm × 5.86mm; UP2B-680-R is 13.97mm × 10.41mm × 6.00mm. Verify PCB layout compatibility before substitution.

Q: Which substitute is recommended for high-temperature applications? A: DRA124-680-R supports the widest operating temperature range (-40°C to 165°C), making it suitable for high-temperature environments. The original SC3316F-680 operates to 125°C. UP2B-680-R is limited to 85°C maximum and is not recommended for elevated temperature applications.