SC3316F-4R7 Equivalent & Substitute Parts

Part Overview

The SC3316F-4R7 is a 4.7 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer, rated for 5.6 A continuous current with a maximum DC resistance of 18 mOhm. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are necessary when the original SC3316F-4R7 becomes unavailable, when alternative thermal or mechanical specifications better suit application requirements, or when supply chain optimization requires qualified alternatives from established manufacturers.

Substiute Parts

SC3316F-4R7

Signal TransformerIn Stock: 1061SC3316F-4R7 Datasheet

Current PartRFQ

B82476B1472M100

EPCOS - TDK ElectronicsIn Stock: 6443B82476B1472M100 Datasheet

MFR RecommendedRFQ

UP2-4R7-R

Eaton - Electronics DivisionIn Stock: 1285UP2-4R7-R Datasheet

MFR RecommendedRFQ

UP2B-4R7-R

Eaton - Electronics DivisionIn Stock: 2253UP2B-4R7-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC3316F-4R7 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Inductance value: 4.7 µH
• Inductance tolerance: ±20%
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Inductance test frequency: 100 kHz

Allowable Variation Criteria:

• Current rating: Substitute must equal or exceed 5.6 A
• DC resistance (DCR): Substitute must not exceed 18 mOhm maximum
• Current saturation (Isat): Substitute must equal or exceed 5.4 A
• Operating temperature range: Substitute must support minimum -40°C to 125°C or equivalent operational envelope
• Physical dimensions: Substitute must be compatible with PCB layout constraints
• RoHS and environmental compliance: Substitute must maintain ROHS3 compliance

The three qualified substitutes (B82476B1472M100, UP2-4R7-R, UP2B-4R7-R) meet all mandatory criteria and fall within allowable variation ranges for electrical performance parameters.

Parameter Comparison

Engineering Selection Recommendations

B82476B1472M100 (EPCOS - TDK Electronics) This substitute offers the lowest DC resistance at 16.5 mOhm maximum, providing superior thermal efficiency compared to the original SC3316F-4R7. The extended operating temperature range (-55°C to 150°C) exceeds the original specification. AEC-Q200 automotive qualification provides additional reliability assurance. Ferrite drum core construction offers improved performance stability. Physical dimensions are slightly smaller, reducing PCB footprint. ROHS3 compliance is maintained. This part is recommended for applications requiring enhanced thermal performance or extended temperature operation.

UP2-4R7-R (Eaton - Electronics Division, UNI-PAC™ 2 Series) This substitute provides the highest current rating at 5.7 A, offering 1.1 A margin above the original specification. DC resistance of 17.3 mOhm is within acceptable limits. Wirewound construction matches the original design approach. RoHS compliance is confirmed. Physical dimensions are comparable to the original. This part is recommended for applications requiring maximum current headroom or where wirewound construction is preferred.

UP2B-4R7-R (Eaton - Electronics Division, UNI-PAC™ Series) This substitute combines ferrite drum core construction with a current rating of 5.5 A and DC resistance of 16.5 mOhm. Operating temperature range is -40°C to 85°C, which covers the original lower bound but does not extend to the original 125°C upper limit. Physical dimensions are slightly larger. RoHS compliance is maintained. This part is recommended for applications operating within the -40°C to 85°C envelope where drum core performance characteristics are acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use B82476B1472M100 as a direct replacement for SC3316F-4R7? A: Yes. B82476B1472M100 meets all mandatory substitution criteria: 4.7 µH inductance, ±20% tolerance, unshielded configuration, surface mount packaging, and 100 kHz test frequency. Electrical parameters (5.3 A current rating, 16.5 mOhm DCR, 5.4 A Isat) are within acceptable ranges. Physical dimensions are slightly smaller (12.95 x 9.40 mm vs. 13.45 x 9.90 mm), requiring PCB layout verification.

Q: What is the difference between wirewound and drum core construction? A: Wirewound inductors (SC3316F-4R7, UP2-4R7-R) use wire wound around a core material. Drum core inductors (B82476B1472M100, UP2B-4R7-R) use ferrite drum cores with wire windings, typically offering improved thermal characteristics and performance stability. Both configurations are unshielded and suitable for surface mount applications.

Q: Which substitute has the best thermal performance? A: B82476B1472M100 offers the lowest DC resistance at 16.5 mOhm maximum, resulting in the lowest resistive heating. The extended operating temperature range (-55°C to 150°C) also indicates superior thermal design. UP2B-4R7-R matches this DCR specification but operates only to 85°C maximum.

Q: Are all substitutes RoHS compliant? A: Yes. B82476B1472M100 is ROHS3 compliant. UP2-4R7-R and UP2B-4R7-R are RoHS compliant. All three substitutes meet environmental compliance requirements.

Q: What are the physical dimension constraints? A: SC3316F-4R7 measures 13.45 x 9.90 mm with 5.21 mm seated height. B82476B1472M100 is slightly smaller (12.95 x 9.40 mm, 5.08 mm height). UP2-4R7-R is slightly larger in length (13.74 mm) but narrower in width (8.76 mm) with greater height (5.86 mm). UP2B-4R7-R is the largest (13.97 x 10.41 mm, 6.00 mm height). PCB layout must accommodate these dimensional variations.

Q: Can I use UP2B-4R7-R in applications requiring operation above 85°C? A: No. UP2B-4R7-R is rated only to 85°C maximum operating temperature, which does not meet the original SC3316F-4R7 specification of 125°C. Use B82476B1472M100 or UP2-4R7-R for applications requiring full -40°C to 125°C operation.

Q: What is the saturation current difference between substitutes? A: SC3316F-4R7 and B82476B1472M100 both specify 5.4 A saturation current. UP2-4R7-R and UP2B-4R7-R specify 4.2 A saturation current, which is 1.2 A lower. Applications sensitive to saturation behavior should account for this difference.