RB480YFHT2R Equivalent & Substitute Parts

Part Overview

The RB480YFHT2R 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 Automotive grade qualification (AEC-Q101) and is RoHS3 compliant.

The RB480YFHT2R is classified as Obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value
Diode Configuration	2 Independent
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io) per Diode	100 mA
Voltage - Forward (Vf) (Max) @ If	530 mV @ 100 mA
Current - Reverse Leakage @ Vr	1 µA @ 10 V
Operating Temperature - Junction (Max)	125°C
Grade	Automotive
Qualification	AEC-Q101
Mounting Type	Surface Mount
Package / Case	SC-75-4, SOT-543
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RB480YFHT2R is determined by the following critical parameters:

Configuration Match: The diode configuration (2 Independent) is the primary functional requirement. Substitute parts must maintain this dual-diode independent architecture to preserve circuit functionality.

Electrical Ratings: Reverse voltage (30 V maximum), forward voltage characteristics (530 mV @ 100 mA), and reverse leakage current (1 µA @ 10 V) establish the electrical operating envelope. Substitute parts must meet or exceed these specifications.

Current Handling: Average rectified current per diode (100 mA) defines the current capacity requirement. Substitute parts rated for equal or higher current capacity are acceptable.

Automotive Compliance: AEC-Q101 qualification and Automotive grade are mandatory for applications requiring automotive-level reliability and traceability.

Package Compatibility: Surface mount packaging with SC-75-4 (SOT-543) footprint is required for PCB layout compatibility. Package changes necessitate circuit board redesign.

Environmental Compliance: RoHS3 compliance and MSL rating (1 - Unlimited) ensure regulatory conformance and handling compatibility.

Two substitute parts are identified based on these criteria:

RB480YT2R - Parametric equivalent with identical electrical specifications and package configuration
RB520SM-30FHT2R - Similar electrical ratings with enhanced current capacity (200 mA) and different package form factor

Parameter Comparison

Parameter	RB480YFHT2R (Main)	RB480YT2R (Substitute)	RB520SM-30FHT2R (Substitute)
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky	Schottky
Diode Configuration	2 Independent	2 Independent	Single
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V
Current - Average Rectified (Io)	100 mA	100 mA	200 mA
Voltage - Forward (Vf) (Max) @ If	530 mV @ 100 mA	530 mV @ 100 mA	580 mV @ 200 mA
Current - Reverse Leakage @ Vr	1 µA @ 10 V	1 µA @ 10 V	1 µA @ 10 V
Speed	Small Signal ≤ 200mA (Io), Any Speed	Small Signal ≤ 200mA (Io), Any Speed	Small Signal ≤ 200mA (Io), Any Speed
Operating Temperature - Junction (Max)	125°C	125°C	150°C
Grade	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-75-4, SOT-543	SC-75-4, SOT-543	SC-79, SOD-523
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Obsolete	Active

Engineering Selection Recommendations

RB480YT2R Selection: This part is the direct parametric equivalent to the RB480YFHT2R. It maintains identical electrical specifications, diode configuration (2 Independent), package form factor (SC-75-4, SOT-543), and operating temperature rating (125°C maximum junction temperature). Both parts are Obsolete status and carry AEC-Q101 automotive qualification. This substitute requires no circuit board redesign and provides pin-for-pin compatibility. Selection of RB480YT2R is appropriate for direct replacement in existing designs where component availability is the primary concern.

RB520SM-30FHT2R Selection: This part differs in configuration (single diode versus 2 independent) and package form factor (SC-79, SOD-523 versus SC-75-4, SOT-543). The RB520SM-30FHT2R offers enhanced current capacity (200 mA versus 100 mA) and higher maximum junction temperature (150°C versus 125°C). This part is Active status, ensuring long-term supply availability. Selection of RB520SM-30FHT2R requires circuit redesign to accommodate the single-diode configuration and different package footprint. This substitute is suitable for new designs or redesigned applications where the enhanced current rating and active product status provide supply chain advantages.

Both substitute parts maintain Automotive grade, AEC-Q101 qualification, RoHS3 compliance, and MSL rating (1 - Unlimited), ensuring regulatory and handling compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can RB480YT2R be used as a direct replacement for RB480YFHT2R?

A: Yes. RB480YT2R is a parametric equivalent with identical electrical specifications, diode configuration (2 Independent), package (SC-75-4, SOT-543), and operating temperature rating (125°C). No circuit modifications are required. Both parts are Obsolete status with AEC-Q101 qualification.

Q: What is the key difference between RB480YT2R and RB520SM-30FHT2R?

A: RB480YT2R maintains the 2 Independent diode configuration and SC-75-4 (SOT-543) package of the original part. RB520SM-30FHT2R is a single diode in SC-79 (SOD-523) package with doubled current capacity (200 mA) and higher junction temperature rating (150°C). RB520SM-30FHT2R requires circuit board redesign.

Q: Why is RB520SM-30FHT2R listed as a substitute if it has a different package?

A: RB520SM-30FHT2R meets the core electrical requirements (30 V reverse voltage, Schottky technology, automotive qualification, AEC-Q101) and offers enhanced performance characteristics. It is included as a substitute for applications undergoing redesign or where the single-diode configuration and improved current capacity provide functional advantages. Package differences necessitate PCB layout modification.

Q: Are all substitute parts automotive qualified?

A: Yes. Both RB480YT2R and RB520SM-30FHT2R carry Automotive grade classification and AEC-Q101 qualification, matching the original RB480YFHT2R specification.

Q: What is the product status difference between the substitutes?

A: RB480YT2R is Obsolete, matching the original part status. RB520SM-30FHT2R is Active, indicating ongoing manufacturing and long-term supply availability. For applications requiring extended production support, RB520SM-30FHT2R provides supply chain continuity despite requiring circuit redesign.

Q: Are moisture sensitivity levels identical across all parts?

A: Yes. RB480YFHT2R, RB480YT2R, and RB520SM-30FHT2R all carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions and identical handling requirements.

Q: Can RB520SM-30FHT2R be used in applications requiring 2 independent diodes?

A: No. RB520SM-30FHT2R is a single diode configuration. Applications requiring 2 independent diodes must use RB480YT2R or implement two separate RB520SM-30FHT2R devices with corresponding circuit modifications.

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