RB520S-40FHTE61 Equivalent & Substitute Parts

Part Overview

The RB520S-40FHTE61 is a Schottky diode manufactured by Rohm Semiconductor, designed for rectification applications requiring low forward voltage drop and fast switching characteristics. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The RB520S-40FHTE61 operates at a maximum reverse voltage of 40V with a 200mA average rectified current rating, making it suitable for low-power switching and rectification circuits.

Key Parameters

Parameter	Value
Manufacturer Part Number	RB520S-40FHTE61
Manufacturer	Rohm Semiconductor
Category	Diodes, Rectifiers
Description	DIODE SCHOTTKY SMD
Product Status	Obsolete
Base Product Number	RB520
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99
HTSUS Code	8541.10.0070

Substitute Part Grouping Explanation

Substitution of the RB520S-40FHTE61 is determined by electrical and mechanical compatibility based on the following critical parameters:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 40V
Current - Average Rectified (Io): 200mA
Voltage - Forward (Vf) (Max) @ If: 550mV @ 100mA
Current - Reverse Leakage @ Vr: 10µA @ 40V
Technology: Schottky

Mechanical Parameters:

Mounting Type: Surface Mount
Package / Case: SC-79, SOD-523
Supplier Device Package: EMD2

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
ECCN: EAR99
HTSUS Code: 8541.10.0070

The RB520SM-40FHT2R qualifies as a direct substitute because it maintains identical electrical ratings, shares the same base product number (RB520), and meets all compliance requirements specified for the original part.

Parameter Comparison

Parameter	RB520S-40FHTE61 (Main Part)	RB520SM-40FHT2R (Substitute)
Manufacturer	Rohm Semiconductor	Rohm Semiconductor
Category	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40V	40V
Current - Average Rectified (Io)	200mA	200mA
Voltage - Forward (Vf) (Max) @ If	550mV @ 100mA	550mV @ 100mA
Current - Reverse Leakage @ Vr	10µA @ 40V	10µA @ 40V
Speed Classification	Small Signal ≤200mA (Io), Any Speed	Small Signal ≤200mA (Io), Any Speed
Mounting Type	Surface Mount	Surface Mount
Package / Case	SC-79, SOD-523	SC-79, SOD-523
Supplier Device Package	EMD2	EMD2
Operating Temperature - Junction (Max)	Not specified	150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS Code	8541.10.0070	8541.10.0070
Product Status	Obsolete	Active
Grade	Not specified	Automotive
Qualification	Not specified	AEC-Q101

Engineering Selection Recommendations

The RB520SM-40FHT2R is the direct equivalent for the obsolete RB520S-40FHTE61. Both components share identical electrical specifications, package configurations, and compliance certifications. The substitute part is currently in active production status with substantial inventory availability (109,400 pieces), ensuring supply chain continuity.

The RB520SM-40FHT2R carries automotive-grade qualification (AEC-Q101) and is rated for automotive applications, providing enhanced reliability assurance compared to the original part specification. Both components maintain ROHS3 compliance and unlimited moisture sensitivity classification (MSL 1), suitable for standard surface mount assembly processes without special handling requirements.

Selection of the RB520SM-40FHT2R eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs utilizing the RB520S-40FHTE61.

Frequently Asked Questions (FAQ)

Q: Can the RB520SM-40FHT2R be used as a direct replacement for the RB520S-40FHTE61?

A: Yes. Both components share identical electrical ratings (40V reverse voltage, 200mA average rectified current, 550mV forward voltage at 100mA), the same package configuration (SC-79, SOD-523, EMD2), and equivalent compliance certifications (ROHS3, MSL 1). The substitute part is functionally interchangeable in all circuit applications.

Q: What is the primary reason for substitution?

A: The RB520S-40FHTE61 is classified as obsolete. The RB520SM-40FHT2R is the active equivalent part from the same manufacturer, ensuring continued availability and supply chain reliability.

Q: Are there packaging differences between these parts?

A: Both parts use identical surface mount packaging: SC-79 and SOD-523 case styles with EMD2 supplier device package designation. No PCB layout modifications are required for substitution.

Q: What compliance certifications apply to the substitute part?

A: The RB520SM-40FHT2R is ROHS3 compliant, carries AEC-Q101 automotive qualification, and maintains EAR99 export classification. Moisture sensitivity level is 1 (unlimited), requiring no special handling during assembly.

Q: Is the substitute part suitable for automotive applications?

A: Yes. The RB520SM-40FHT2R carries automotive-grade designation with AEC-Q101 qualification, making it suitable for automotive circuit applications. The original part specification does not indicate automotive qualification.

Q: What is the inventory status of the substitute part?

A: The RB520SM-40FHT2R has 109,400 pieces in stock as new original inventory, providing immediate availability for production requirements.

Q: Are there any electrical parameter differences?

A: No. All critical electrical parameters are identical: 40V maximum reverse voltage, 200mA average rectified current, 550mV maximum forward voltage at 100mA, and 10µA maximum reverse leakage current at 40V.

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