S2B-E3/5BT Equivalent & Substitute Parts

Part Overview

The S2B-E3/5BT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 100V DC reverse voltage with 1.5A average rectified current in a DO-214AA (SMB) package. The part is currently active in production with 2773 units in stock. Equivalent and substitute parts are identified based on matching or exceeding electrical specifications within the same package category, enabling direct replacement or functional substitution in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	1	µA @ 100 V
Capacitance @ Vr, F	16	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the S2B-E3/5BT are classified into two categories based on electrical parameter compatibility:

Parametric Equivalents share identical electrical specifications and technology type. These parts maintain the same voltage rating (100V), current rating (1.5A), forward voltage drop (1.15V @ 1.5A), recovery time (2µs), and reverse leakage characteristics (1µA @ 100V). Parametric equivalents differ only in manufacturer, packaging variant, or qualification level (such as automotive AEC-Q101 certification).

Functional Substitutes exceed the primary electrical specifications while maintaining the same package form factor (DO-214AA/SMB) and voltage rating (100V). These parts feature higher current ratings (2A), different technology types (Schottky), or modified recovery characteristics that allow operation in the same circuit topology with enhanced performance margins.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100V
Current - Average Rectified (Io): Must equal or exceed 1.5A
Package / Case: Must be DO-214AA or SMB
Mounting Type: Must be Surface Mount
Technology: Standard or Schottky acceptable

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	trr	Ir @ Vr	Technology	Status
S2B-E3/5BT	Vishay	100V	1.5A	1.15V @ 1.5A	2µs	1µA @ 100V	Standard	Active
S2B-E3/52T	Vishay	100V	1.5A	1.15V @ 1.5A	2µs	1µA @ 100V	Standard	Active
S2BHE3_A/I	Vishay	100V	1.5A	1.15V @ 1.5A	2µs	1µA @ 100V	Standard	Active (AEC-Q101)
STPS2H100U	STMicroelectronics	100V	2A	790mV @ 2A	≤500ns	1µA @ 100V	Schottky	Active
ES2B R5G	Taiwan Semiconductor	100V	2A	950mV @ 2A	35ns	10µA @ 100V	Standard	Discontinued
S1BB-13-F	Diodes Incorporated	100V	1A	1.1V @ 1A	3µs	5µA @ 100V	Standard	Active
S2B	Diotec Semiconductor	100V	2A	1.15V @ 2A	1.5µs	5µA @ 100V	Standard	Active
S2B-13-F	Diodes Incorporated	100V	1.5A	1.15V @ 1.5A	—	5µA @ 100V	Standard	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Drop-In Replacement):

S2B-E3/52T and S2BHE3_A/I are direct parametric equivalents to the S2B-E3/5BT. Both parts maintain identical electrical specifications across all critical parameters. S2B-E3/52T is available in higher quantity (45,200 units) and represents the standard commercial variant. S2BHE3_A/I carries AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade reliability; this variant is appropriate for automotive and industrial environments with enhanced qualification requirements.

Functional Substitutes with Enhanced Performance:

STPS2H100U (STMicroelectronics) is a Schottky diode offering 2A current capacity with significantly lower forward voltage drop (790mV @ 2A versus 1.15V @ 1.5A). This part reduces power dissipation and heat generation in high-frequency switching applications. The faster recovery time (≤500ns) supports higher switching frequencies. This substitute is suitable when thermal performance or switching speed improvements are beneficial.

S2B (Diotec Semiconductor) provides 2A current capacity with identical forward voltage characteristics (1.15V @ 2A) and faster recovery time (1.5µs). This part offers current margin improvement while maintaining standard recovery characteristics.

S2B-13-F (Diodes Incorporated) matches the 1.5A current rating with identical forward voltage specification. This part is suitable for applications where manufacturer diversification is required while maintaining equivalent electrical performance.

Not Recommended for Direct Substitution:

S1BB-13-F operates at reduced current capacity (1A versus 1.5A) and is suitable only for applications with lower current requirements. ES2B R5G is discontinued at DiGi Electronics and should not be selected for new designs despite higher current rating.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited). Operating temperature ranges vary slightly; verify application requirements against the -55°C to 150°C range of the primary part.

Frequently Asked Questions (FAQ)

Q: Can S2B-E3/52T replace S2B-E3/5BT directly without circuit modification?

A: Yes. S2B-E3/52T is a parametric equivalent with identical electrical specifications. Both parts share the same voltage rating (100V), current rating (1.5A), forward voltage drop (1.15V @ 1.5A), recovery time (2µs), and package form factor (DO-214AA/SMB). Direct substitution requires no circuit changes.

Q: What is the difference between S2BHE3_A/I and S2B-E3/5BT?

A: S2BHE3_A/I maintains identical electrical specifications but carries AEC-Q101 automotive qualification. This certification indicates compliance with automotive reliability and testing standards. Select S2BHE3_A/I for automotive applications or environments requiring enhanced qualification documentation.

Q: Can STPS2H100U be used as a drop-in replacement?

A: STPS2H100U is a functional substitute, not a parametric equivalent. It features Schottky technology with 2A current capacity and lower forward voltage drop (790mV @ 2A). The package form factor (DO-214AA/SMB) is identical, enabling physical substitution. However, the different technology type and electrical characteristics may affect circuit performance. Verify that the lower forward voltage drop and faster recovery time are compatible with circuit design requirements.

Q: Why is ES2B R5G listed if it is discontinued?

A: ES2B R5G is included in the substitute list based on the provided input data. However, its discontinued status at DiGi Electronics makes it unsuitable for new designs. Select active alternatives such as S2B-E3/52T, S2BHE3_A/I, or STPS2H100U instead.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Voltage - DC Reverse rating must equal or exceed 100V, (2) Current - Average Rectified must equal or exceed 1.5A, (3) Package form factor must be DO-214AA or SMB, and (4) Mounting type must be Surface Mount. Forward voltage drop, recovery time, and reverse leakage characteristics may vary between substitutes but must be verified against circuit design requirements.

Q: Can S1BB-13-F replace S2B-E3/5BT?

A: S1BB-13-F is not recommended as a direct replacement. This part operates at reduced current capacity (1A versus 1.5A required). Use S1BB-13-F only in applications with lower current requirements or where current derating is acceptable.

Q: What is the advantage of using S2B from Diotec Semiconductor?

A: S2B (Diotec) provides 2A current capacity with identical forward voltage characteristics (1.15V @ 2A) and faster recovery time (1.5µs versus 2µs). This part offers improved current margin and slightly faster switching performance while maintaining standard recovery characteristics. Select this part when higher current capacity or faster recovery is beneficial.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended active substitutes maintain ROHS3 compliance. Verify compliance status in the product datasheet for specific applications requiring regulatory documentation.

Q: What is Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the maximum time a component can be exposed to moisture before soldering. All recommended substitutes carry MSL 1 (Unlimited), meaning they can be stored indefinitely without moisture-related degradation. This specification is critical for supply chain management and assembly process planning.

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