SC1813FH-4R7 Equivalent & Substitute Parts

Part Overview

The SC1813FH-4R7 is a 4.7 µH unshielded wirewound inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 2.7 A and maximum DC resistance of 54 mOhm. This component is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and package class.

Substiute Parts

SC1813FH-4R7

Signal TransformerIn Stock: 994SC1813FH-4R7 Datasheet

Current PartRFQ

UP1B-4R7-R

Eaton - Electronics DivisionIn Stock: 3253UP1B-4R7-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC1813FH-4R7 is determined by the following critical parameters:

Inductance value must match at 4.7 µH with tolerance of ±20%. DC resistance must not exceed 54 mOhm maximum to ensure equivalent electrical performance in the circuit. Current rating must support the application requirement; substitute parts with lower current ratings require circuit re-evaluation. Saturation current (Isat) of 2.6 A establishes the maximum operating point. Shielding configuration must remain unshielded to maintain electromagnetic compatibility with the original design. Surface mount mounting type and nonstandard package dimensions (0.350" L x 0.240" W, 5.00mm max height) are mandatory for PCB layout compatibility. Operating temperature range and RoHS3 compliance status must be maintained or exceeded.

Parameter Comparison

Engineering Selection Recommendations

The UP1B-4R7-R from Eaton - Electronics Division qualifies as a substitute for the SC1813FH-4R7 based on matching inductance value, tolerance, saturation current, shielding configuration, package dimensions, and compliance certifications. Both components are Active product status with ROHS3 compliance and MSL 1 rating.

The primary parameter variance is the current rating: the substitute part is rated at 2.2 A compared to the original 2.7 A. Circuit applications operating at or below 2.2 A continuous current are compatible with this substitute. The operating temperature range of the substitute extends to 85°C maximum, compared to 125°C for the original part; applications requiring operation above 85°C require the original SC1813FH-4R7. DC resistance differential of 0.4 mOhm is within acceptable engineering tolerance for equivalent circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the UP1B-4R7-R be used in all applications where SC1813FH-4R7 is specified?

A: Substitution is valid for applications where continuous current does not exceed 2.2 A and operating temperature remains below 85°C. Applications requiring the full 2.7 A rating or operation above 85°C require the original SC1813FH-4R7.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both components share identical package dimensions of 0.350" L x 0.240" W (8.89mm x 6.10mm) with 0.197" (5.00mm) maximum seated height, ensuring direct PCB layout compatibility.

Q: What is the significance of the DC resistance difference?

A: The UP1B-4R7-R has a maximum DC resistance of 54.4 mOhm compared to 54 mOhm for the SC1813FH-4R7. This 0.4 mOhm difference produces negligible impact on circuit performance for most applications and remains within standard engineering tolerance.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental and regulatory compliance.

Q: What core material difference exists between these inductors?

A: The SC1813FH-4R7 uses an unspecified core material, while the UP1B-4R7-R employs a ferrite drum core. Both maintain unshielded configuration and equivalent electrical performance at the specified inductance and frequency test point of 100 kHz.