SC4020FH-470 Equivalent & Substitute Parts

Part Overview

The SC4020FH-470 is a 47 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer. Rated for 2.1 A continuous current with a maximum DC resistance of 132 mOhm, this component is designed for applications requiring fixed inductance in compact form factors. The part maintains Active product status and operates across the industrial temperature range of -40°C to 125°C. Substitute parts become necessary when design requirements demand alternative thermal ratings, shielding characteristics, or when primary inventory availability is constrained.

Substiute Parts

SC4020FH-470

Signal TransformerIn Stock: 658SC4020FH-470 Datasheet

Current PartRFQ

DRA124-470-R

Eaton - Electronics DivisionIn Stock: 1276DRA124-470-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC4020FH-470 is determined by the following critical parameters:

• Inductance value must match at 47 µH
• Tolerance specification must be ±20% or tighter
• Current rating must support minimum 2.1 A continuous operation
• Saturation current must equal or exceed 2.4 A
• DC resistance must not exceed 132 mOhm
• Surface mount configuration required
• Operating temperature range must encompass -40°C to 125°C minimum
• RoHS3 compliance required

The DRA124-470-R from Eaton - Electronics Division qualifies as a direct substitute based on these parameters. While the DRA124-470-R features shielding (versus unshielded construction) and operates to 165°C (extended upper range), it meets all minimum electrical requirements and maintains equivalent inductance, tolerance, and compliance specifications.

Parameter Comparison

Engineering Selection Recommendations

Both SC4020FH-470 and DRA124-470-R maintain Active product status and ROHS3 compliance. The DRA124-470-R carries AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components. Selection between these parts should be based on application-specific requirements: the SC4020FH-470 is suitable for standard industrial applications, while the DRA124-470-R is appropriate for automotive or extended temperature environments. The shielded construction of the DRA124-470-R may provide electromagnetic interference mitigation benefits in noise-sensitive circuits, though this represents a design change from the original unshielded specification.

Frequently Asked Questions (FAQ)

Q: Can DRA124-470-R replace SC4020FH-470 in all applications?

A: Electrical substitution is valid based on matching inductance, tolerance, and saturation characteristics. However, the DRA124-470-R has a lower continuous current rating (1.78 A versus 2.1 A). Applications operating at or near 2.1 A require verification that the lower rating does not compromise circuit performance. The shielded construction of the DRA124-470-R differs from the original unshielded design and may affect circuit behavior in EMI-sensitive applications.

Q: What are the physical differences between these parts?

A: The SC4020FH-470 measures 0.768" L x 0.524" W x 0.272" H (19.50mm x 13.30mm x 6.90mm). The DRA124-470-R measures 0.492" L x 0.492" W x 0.177" H (12.50mm x 12.50mm x 4.50mm). The DRA124-470-R is significantly smaller and may require PCB layout modifications.

Q: Are both parts available in the same packaging format?

A: Both parts are supplied in Tape & Reel (TR) packaging and are classified as Nonstandard package types. Moisture sensitivity level is 1 (Unlimited) for both components.

Q: What compliance certifications apply to each part?

A: Both parts are ROHS3 compliant and REACH unaffected. The DRA124-470-R additionally carries AEC-Q200 automotive qualification. Both are classified under ECCN EAR99.

Q: How do DC resistance values compare?

A: SC4020FH-470 specifies 132 mOhm maximum, while DRA124-470-R specifies 134 mOhm. The difference of 2 mOhm is negligible for most applications and falls within typical manufacturing tolerances.