RS3B-E3/9AT Equivalent & Substitute Parts

Part Overview

The RS3B-E3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 100 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) package. The device features fast recovery characteristics with a reverse recovery time of 150 ns and operates across a junction temperature range of -55°C to 150°C.

The RS3B-E3/9AT is currently in active product status. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific performance requirements where parametric compatibility exists.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2.5 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	10	µA @ 100 V
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the RS3B-E3/9AT are classified into two categories based on parametric compatibility:

Parametric Equivalents share identical electrical specifications and package form factor. These parts are direct functional replacements with no circuit redesign required:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): 150 ns
Operating Temperature - Junction: -55°C to 150°C minimum

Manufacturer Recommended Alternatives meet the core electrical requirements (100 V, 3 A, DO-214AB/SMC package) but may exhibit variations in secondary parameters such as forward voltage, reverse recovery time, reverse leakage current, or operating temperature range. These parts are suitable for applications where the specified parameter variations do not impact circuit performance.

Technology Variants include Schottky diodes and higher voltage-rated devices that provide enhanced performance characteristics in specific application contexts while maintaining the 3 A current rating and surface mount package compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Status
RS3B-E3/9AT	Vishay	100	3	1.3 @ 2.5A	Fast Recovery ≤ 500ns	150	10 @ 100V	DO-214AB (SMC)	-55 to 150	Active
RS3B-E3/57T	Vishay	100	3	1.3 @ 2.5A	Fast Recovery ≤ 500ns	150	10 @ 100V	DO-214AB (SMC)	-55 to 150	Active
ES3B	Taiwan Semiconductor	100	3	0.95 @ 3A	Fast Recovery ≤ 500ns	35	10 @ 100V	DO-214AB (SMC)	-55 to 150	Active
RS3B-13-F	Diodes Incorporated	100	3	1.3 @ 3A	Fast Recovery ≤ 500ns	150	5 @ 100V	DO-214AB (SMC)	-65 to 150	Active
S3B	Diotec Semiconductor	100	3	1.15 @ 3A	Standard Recovery > 500ns	1500	5 @ 100V	DO-214AB (SMC)	-50 to 150	Active
S3B-13-F	Diodes Incorporated	100	3	1.15 @ 3A	Standard Recovery > 500ns	—	10 @ 100V	DO-214AB (SMC)	-65 to 150	Active
STPS3H100U	STMicroelectronics	100	3	0.84 @ 3A	Fast Recovery ≤ 500ns	—	1 @ 100V	DO-214AA (SMB)	—	Active
STTH302S	STMicroelectronics	200	3	0.95 @ 3A	Fast Recovery ≤ 500ns	35	3 @ 200V	DO-214AB (SMC)	—	Active
RS3B R7G	Taiwan Semiconductor	100	3	1.3 @ 3A	Fast Recovery ≤ 500ns	150	10 @ 100V	DO-214AB (SMC)	-55 to 150	Discontinued
RS3B V7G	Taiwan Semiconductor	100	3	1.3 @ 3A	Fast Recovery ≤ 500ns	150	10 @ 100V	DO-214AB (SMC)	-55 to 150	Discontinued

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Drop-In Replacement)

RS3B-E3/57T is a parametric equivalent differing only in packaging format (Cut Tape versus Tape & Reel). This part maintains identical electrical specifications and is suitable for direct substitution where packaging format is compatible with assembly processes.

Active Manufacturer Alternatives with Enhanced Performance

ES3B (Taiwan Semiconductor) and STTH302S (STMicroelectronics) offer reduced reverse recovery time (35 ns versus 150 ns) and lower forward voltage characteristics. These devices are suitable for applications requiring improved switching performance and reduced power dissipation. ES3B maintains the 100 V rating, while STTH302S provides 200 V reverse voltage capability for higher voltage applications.

RS3B-13-F (Diodes Incorporated) maintains fast recovery characteristics and extends the operating temperature range to -65°C. This part is suitable for applications requiring enhanced low-temperature performance.

Standard Recovery Alternatives

S3B and S3B-13-F (Diotec Semiconductor and Diodes Incorporated respectively) employ standard recovery technology with longer reverse recovery times (1500 ns and unspecified, respectively). These parts are suitable for low-frequency applications where switching speed is not a critical parameter. Both maintain the 100 V, 3 A rating and DO-214AB (SMC) package.

Technology Variant - Schottky Diode

STPS3H100U (STMicroelectronics) is a Schottky diode technology variant with significantly lower forward voltage (0.84 V) and reverse leakage current (1 µA). The package form is DO-214AA (SMB), which differs from the DO-214AB (SMC) standard package. This device is suitable for applications where reduced forward voltage drop and lower leakage are prioritized, provided the SMB package is compatible with the circuit board layout.

Higher Voltage Alternative

STTH302S provides 200 V reverse voltage rating while maintaining 3 A current capacity. This part is suitable for applications requiring higher voltage margin or operation in elevated voltage environments.

Discontinued Parts

RS3B R7G and RS3B V7G are discontinued at DiGi Electronics. These parts maintain parametric equivalence to the RS3B-E3/9AT but are not recommended for new designs due to product status discontinuation.

All recommended substitute parts maintain ROHS3 compliance and are suitable for surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can RS3B-E3/57T be used as a direct replacement for RS3B-E3/9AT?

A: Yes. RS3B-E3/57T is a parametric equivalent with identical electrical specifications. The difference is packaging format: RS3B-E3/9AT is supplied in Tape & Reel (TR) format, while RS3B-E3/57T is supplied in Cut Tape (CT) format. Substitution is valid where the packaging format is compatible with assembly equipment and processes.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes have reverse recovery times of 500 ns or less, enabling faster switching and reduced power dissipation in high-frequency applications. Standard recovery diodes exceed 500 ns reverse recovery time and are suitable for low-frequency rectification where switching speed is not critical. The RS3B-E3/9AT is a fast recovery device (150 ns). Standard recovery alternatives (S3B, S3B-13-F) are suitable only for applications where the longer recovery time does not impact circuit performance.

Q: Can STPS3H100U replace RS3B-E3/9AT in all applications?

A: STPS3H100U is a Schottky diode technology variant with lower forward voltage (0.84 V versus 1.3 V) and significantly lower reverse leakage current (1 µA versus 10 µA). The package form differs: STPS3H100U uses DO-214AA (SMB) while RS3B-E3/9AT uses DO-214AB (SMC). Substitution requires verification that the SMB package is compatible with the circuit board layout and that the lower forward voltage does not impact voltage regulation or biasing circuits.

Q: Is STTH302S suitable as a substitute for RS3B-E3/9AT?

A: STTH302S is rated for 200 V reverse voltage versus 100 V for RS3B-E3/9AT. This higher voltage rating provides additional safety margin in applications subject to voltage transients or overvoltage conditions. The 3 A current rating and DO-214AB (SMC) package are compatible. STTH302S features reduced reverse recovery time (35 ns) and lower forward voltage (0.95 V), making it suitable for applications where improved switching performance is beneficial. Substitution is valid where the higher voltage rating does not introduce cost or performance constraints.

Q: What is the significance of the operating temperature range difference between RS3B-E3/9AT (-55°C to 150°C) and RS3B-13-F (-65°C to 150°C)?

A: RS3B-13-F extends the minimum operating temperature to -65°C, providing enhanced performance in applications subject to low-temperature environments. The RS3B-E3/9AT is rated to -55°C. Substitution of RS3B-13-F for RS3B-E3/9AT is valid for all applications and provides additional low-temperature capability. Reverse substitution (RS3B-E3/9AT for RS3B-13-F) is valid only where the application does not require operation below -55°C.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts listed in this document maintain ROHS3 compliance status. Compliance certifications are provided in the parameter comparison table. Verification of specific compliance requirements for your application is recommended.

Q: What packaging formats are available for the RS3B-E3/9AT equivalent?

A: The RS3B-E3/9AT is supplied in Tape & Reel (TR) format. Parametric equivalent RS3B-E3/57T is supplied in Cut Tape (CT) format. Manufacturer alternatives are supplied in various formats including Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® formats. Packaging format selection depends on assembly equipment compatibility and production volume requirements.

Q: Can discontinued parts (RS3B R7G, RS3B V7G) be used in new designs?

A: RS3B R7G and RS3B V7G are discontinued at DiGi Electronics and are not recommended for new designs. While parametric equivalence exists, discontinued product status creates supply chain risk and limits long-term availability. Active alternatives with equivalent or superior performance characteristics are available and should be selected for new designs.

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