RB481Y-40FHT2R Equivalent & Substitute Parts Reference

Part Overview

The RB481Y-40FHT2R from Rohm Semiconductor is a diode array consisting of two independent 40 V, 200 mA Schottky diodes in a surface mount SC-75-4 (SOT-543) package. The product is classified as obsolete, necessitating the identification of alternative models for ongoing production, maintenance, or repair requirements where form, fit, and function must be maintained. Replacement must strictly adhere to the provided key parameters: voltage rating, current capability, reverse leakage, package characteristics, compliance markings, and qualification status.

Substiute Parts

RB481Y-40FHT2R

Rohm SemiconductorIn Stock: 1160RB481Y-40FHT2R Datasheet

Current PartRFQ

RB521SM-40FHT2R

Rohm SemiconductorIn Stock: 17849RB521SM-40FHT2R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitution process is based strictly on the following explicit parameters: Schottky diode technology, reverse voltage (40 V max), average rectified current capability (200 mA), reverse leakage current (90 µA max @ 40 V), automotive grade, AEC-Q101 qualification, surface mount package, and compliance status (ROHS3, REACH, MSL rating). Only components matching these criteria can be considered direct equivalents or substitutes in the diode or rectifier category.

Parameter Comparison

Engineering Selection Recommendations

Selection of substitute parts must be based on the product status (obsolete for RB481Y-40FHT2R), with preference for parts in active production status such as RB521SM-40FHT2R. Compliance with ROHS3, AEC-Q101, and automotive grade ensures suitability for regulated and automotive applications. Moisture Sensitivity Level ratings (1) and REACH status are critical for storage and handling; these requirements are satisfied by both main and substitute parts.

Frequently Asked Questions (FAQ)

Q1: What defines a valid substitute for the RB481Y-40FHT2R Schottky diode array?
A1: The substitute must have the same or higher maximum reverse voltage, equal or greater average rectified current, similar or lower reverse leakage current, identical or comparable package for mounting, Schottky technology, and matching compliance and qualification statuses.

Q2: Does the package or supplier device package need to be identical?
A2: The mounting type must be surface mount, and the package should be compatible with existing layouts. The RB481Y-40FHT2R uses SC-75-4 (SOT-543), while RB521SM-40FHT2R uses SC-79 (SOD-523); physical compatibility must be confirmed.

Q3: Are compliance certifications and qualification (RoHS, REACH, AEC-Q101) required for substitutions?
A3: Substitutes must be ROHS3 compliant, REACH unaffected, and meet automotive grade with AEC-Q101 qualification as documented.

Q4: What is the importance of product status in selection?
A4: Obsolete product status indicates end-of-life; using an active substitute such as RB521SM-40FHT2R ensures availability for production and service requirements.

Q5: Is there a difference in electrical parameters that affects compatibility?
A5: Both RB481Y-40FHT2R and RB521SM-40FHT2R match in key electrical parameters: technology, voltage, current, reverse leakage, automotive grade, and compliance requirements per supplied data. Differences in forward voltage rating and package must be reviewed for application-specific constraints.