RB480YFST2R Equivalent & Substitute Parts

Part Overview

The RB480YFST2R is a Schottky diode array manufactured by Rohm Semiconductor, configured as 2 independent diodes rated for 30 V DC reverse voltage and 100 mA average rectified current per diode. The device is packaged in SC-75-4 (SOT-543) surface mount configuration with EMD4 supplier packaging.

This part carries an Obsolete product status. Locating equivalent or substitute components is necessary to support ongoing production requirements, maintenance operations, and design continuity where this device was previously specified.

Substiute Parts

RB480YFST2R

Rohm SemiconductorIn Stock: 661RB480YFST2R Datasheet

Current PartRFQ

RB520SM-30T2R

Rohm SemiconductorIn Stock: 493176RB520SM-30T2R Datasheet

SimilarRFQ

RB480YT2R

Rohm SemiconductorIn Stock: 26531RB480YT2R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RB480YFST2R is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Schottky diode technology
• 30 V DC reverse voltage rating
• Forward voltage characteristics suitable for 100 mA operation
• Reverse leakage current at specified voltage

Mechanical and Packaging Compatibility:

• Surface mount mounting type
• Package footprint and pinout compatibility

Regulatory and Environmental Compliance:

• RoHS3 compliance
• MSL rating of 1 (Unlimited)

Two substitute parts meet these criteria with varying degrees of parametric alignment:

RB480YT2R provides parametric equivalence with identical electrical specifications and package configuration, though carrying Obsolete product status.

RB520SM-30T2R provides functional substitution with higher current rating (200 mA versus 100 mA per diode) and elevated junction temperature rating (150°C versus 125°C), but operates in a different package (SC-79, SOD-523) and single diode configuration rather than dual independent configuration.

Parameter Comparison

Engineering Selection Recommendations

RB480YT2R Selection Criteria:

The RB480YT2R is a parametric equivalent to the RB480YFST2R. Both devices share identical electrical specifications, diode configuration (2 independent), package type (SC-75-4, SOT-543), and supplier device package (EMD4). This part maintains full compatibility with existing PCB layouts and circuit designs. Both parts carry Obsolete product status; however, RB480YT2R maintains higher inventory availability (26,494 pieces in stock versus 643 pieces for RB480YFST2R). Selection of RB480YT2R is appropriate for direct replacement in applications where the dual independent diode configuration and 100 mA per diode rating are required. Both parts maintain ROHS3 compliance and MSL 1 rating.

RB520SM-30T2R Selection Criteria:

The RB520SM-30T2R is a functional substitute suitable for applications where circuit topology permits single diode operation or where dual diodes can be implemented through alternative packaging. This part carries Active product status, ensuring long-term availability and supply chain continuity. The RB520SM-30T2R provides enhanced performance margins with 200 mA current rating and 150°C maximum junction temperature compared to the 100 mA and 125°C specifications of the main part. However, the different package type (SC-79, SOD-523 versus SC-75-4, SOT-543) and single diode configuration require PCB redesign and circuit topology modification. Forward voltage at rated current is higher (580 mV @ 200 mA versus 530 mV @ 100 mA), which may affect circuit performance in voltage-sensitive applications. Selection of RB520SM-30T2R is appropriate only when circuit redesign is feasible and the single diode configuration meets application requirements. This part maintains ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can RB480YT2R be used as a direct replacement for RB480YFST2R without PCB modification?

A: Yes. The RB480YT2R is a parametric equivalent with identical electrical specifications, diode configuration, and package type (SC-75-4, SOT-543). No PCB layout changes are required for substitution.

Q: What are the key differences between RB480YT2R and RB520SM-30T2R?

A: RB480YT2R maintains the dual independent diode configuration in SC-75-4 (SOT-543) package with 100 mA per diode rating. RB520SM-30T2R is a single diode in SC-79 (SOD-523) package with 200 mA rating. These differences require circuit topology evaluation and potential PCB redesign for RB520SM-30T2R substitution.

Q: Why does RB520SM-30T2R have higher forward voltage than RB480YFST2R?

A: Forward voltage specifications are measured at different current levels. RB480YFST2R specifies 530 mV @ 100 mA, while RB520SM-30T2R specifies 580 mV @ 200 mA. The higher current level in RB520SM-30T2R results in increased forward voltage drop. Direct voltage comparison requires evaluation at identical current levels.

Q: Is RB480YT2R suitable for new designs?

A: RB480YT2R carries Obsolete product status. While currently available in inventory (26,494 pieces), long-term supply cannot be guaranteed. For new designs, RB520SM-30T2R is recommended due to Active product status, ensuring sustained availability and supply chain reliability.

Q: What compliance certifications apply to all three parts?

A: All three parts (RB480YFST2R, RB480YT2R, and RB520SM-30T2R) are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. All parts are REACH Unaffected.

Q: Can RB520SM-30T2R be used in applications requiring dual independent diodes?

A: No. RB520SM-30T2R is a single diode device. Applications requiring dual independent diodes must use RB480YFST2R or RB480YT2R, or implement two separate RB520SM-30T2R devices with corresponding PCB layout modifications.

Q: What is the impact of different package types on PCB assembly?

A: RB480YFST2R and RB480YT2R use SC-75-4 (SOT-543) package. RB520SM-30T2R uses SC-79 (SOD-523) package. Different packages have different footprints, pinouts, and solder pad configurations. Substitution with RB520SM-30T2R requires PCB redesign and assembly process validation.