S1BA-E3/61T Equivalent & Substitute Parts

Part Overview

The S1BA-E3/61T is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 100 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is classified as obsolete, indicating it is no longer in active production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing manufacturing requirements for applications utilizing this component.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Reverse Recovery Time (trr)	1 µs
Current - Reverse Leakage @ Vr	3 µA @ 100 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the S1BA-E3/61T are grouped into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Vishay S1B Series): Parts sharing the same base product number (S1B), voltage rating (100 V), current rating (1 A), package type (DO-214AC/SMA), and operating temperature range (-55°C ~ 150°C). These parts differ primarily in packaging format (Tape & Reel vs. Cut Tape) and minor variations in reverse recovery time (1.8 µs vs. 1 µs) and reverse leakage current (1 µA vs. 3 µA). All are ROHS3 compliant with MSL 1 rating.

Manufacturer Recommended Alternatives (Cross-Manufacturer): Parts from Fairchild Semiconductor, YAGEO, Diodes Incorporated, and Micro Commercial Co that meet the core electrical requirements (100 V, 1 A, DO-214AC/SMA package) but may exhibit different recovery characteristics (fast recovery ≤ 500 ns vs. standard recovery > 500 ns), forward voltage specifications, and temperature operating ranges. These alternatives provide functional equivalence for general-purpose rectification applications.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C ~ 150°C minimum
RoHS Compliance: ROHS3 Compliant

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Package	Product Status	Packaging Format
S1BA-E3/61T	Vishay	100 V	1 A	1.1 V @ 1 A	1 µs	3 µA @ 100 V	DO-214AC, SMA	Obsolete	Cut Tape & Digi-Reel
S1B-E3/5AT	Vishay	100 V	1 A	1.1 V @ 1 A	1.8 µs	1 µA @ 100 V	DO-214AC, SMA	Active	Tape & Reel
S1B-E3/61T	Vishay	100 V	1 A	1.1 V @ 1 A	1.8 µs	1 µA @ 100 V	DO-214AC, SMA	Active	Cut Tape & Digi-Reel
S1B-M3/5AT	Vishay	100 V	1 A	1.1 V @ 1 A	1.8 µs	1 µA @ 100 V	DO-214AC, SMA	Active	Tape & Reel
S1B-M3/61T	Vishay	100 V	1 A	1.1 V @ 1 A	1.8 µs	1 µA @ 100 V	DO-214AC, SMA	Active	Tape & Reel
S1BHE3_A/H	Vishay	100 V	1 A	1.1 V @ 1 A	1.8 µs	1 µA @ 100 V	DO-214AC, SMA	Active	Cut Tape
S1BHE3_A/I	Vishay	100 V	1 A	1.1 V @ 1 A	1.8 µs	1 µA @ 100 V	DO-214AC, SMA	Active	Tape & Reel
EGF1B	Fairchild Semiconductor	100 V	1 A	1 V @ 1 A	50 ns	10 µA @ 100 V	DO-214AC, SMA	Active	Not Specified
ES1B	YAGEO	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	Active	Cut Tape & Digi-Reel
ES1B-13-F	Diodes Incorporated	100 V	1 A	920 mV @ 1 A	25 ns	5 µA @ 100 V	DO-214AC, SMA	Active	Tape & Reel
ES1B-LTP	Micro Commercial Co	100 V	1 A	950 mV @ 1 A	35 ns	5 µA @ 100 V	DO-214AC, SMA	Not For New Designs	Tape & Reel

Engineering Selection Recommendations

Primary Substitutes (Vishay S1B Series - Active Status):

The S1B-E3/61T and S1B-M3/61T are direct functional replacements for the obsolete S1BA-E3/61T. Both maintain identical electrical specifications (100 V, 1 A, 1.1 V forward voltage) and package configuration (DO-214AC/SMA). The S1B-E3/61T is available in Cut Tape & Digi-Reel format matching the original packaging, while S1B-M3/61T is supplied in Tape & Reel format. Both are ROHS3 compliant with MSL 1 rating and support the full operating temperature range (-55°C ~ 150°C).

The S1B-E3/5AT and S1B-M3/5AT offer equivalent electrical performance with Tape & Reel packaging. These parts exhibit slightly longer reverse recovery time (1.8 µs vs. 1 µs) and lower reverse leakage current (1 µA vs. 3 µA), representing improved performance characteristics for general-purpose rectification.

Automotive-Grade Alternatives (Vishay S1BHE3 Series - AEC-Q101 Qualified):

The S1BHE3_A/H (Cut Tape) and S1BHE3_A/I (Tape & Reel) are automotive-grade equivalents with AEC-Q101 qualification. These parts maintain identical electrical specifications and package type while providing enhanced reliability for automotive applications. Selection of these parts is appropriate when automotive-grade qualification is a design requirement.

Cross-Manufacturer Alternatives:

The ES1B-13-F (Diodes Incorporated) and EGF1B (Fairchild Semiconductor) provide functional equivalence with fast recovery characteristics (≤ 500 ns). These parts meet the core voltage and current requirements but exhibit different recovery time profiles and forward voltage characteristics. The ES1B-LTP (Micro Commercial Co) is designated "Not For New Designs" and should not be selected for new applications.

Selection Criteria:

For direct replacement with identical packaging: S1B-E3/61T (Active, Cut Tape & Digi-Reel)
For improved performance with standard packaging: S1B-E3/5AT or S1B-M3/5AT (Active, Tape & Reel)
For automotive applications: S1BHE3_A/H or S1BHE3_A/I (Active, AEC-Q101 qualified)
For fast recovery applications: ES1B-13-F (Active, Diodes Incorporated)

Frequently Asked Questions (FAQ)

Q: Can the S1B-E3/61T directly replace the obsolete S1BA-E3/61T?

A: Yes. The S1B-E3/61T is an active product with identical electrical specifications (100 V, 1 A, 1.1 V forward voltage) and package configuration (DO-214AC/SMA). Both are ROHS3 compliant with MSL 1 rating and support the operating temperature range of -55°C ~ 150°C. The primary difference is product status (Active vs. Obsolete).

Q: What is the difference between S1B-E3/61T and S1B-E3/5AT?

A: Both parts share identical voltage (100 V), current (1 A), and forward voltage (1.1 V @ 1 A) specifications. The primary differences are packaging format (S1B-E3/61T is Cut Tape & Digi-Reel; S1B-E3/5AT is Tape & Reel) and minor variations in reverse recovery time (1.8 µs vs. 1 µs) and reverse leakage current (1 µA vs. 3 µA). Selection depends on packaging requirements and supply chain availability.

Q: Are the automotive-grade S1BHE3 parts suitable for non-automotive applications?

A: Yes. The S1BHE3_A/H and S1BHE3_A/I maintain identical electrical specifications and package configuration as the standard S1B series. AEC-Q101 qualification provides additional reliability assurance and does not restrict use in non-automotive applications. These parts are appropriate when enhanced reliability is desired.

Q: What is the significance of reverse recovery time differences between substitute parts?

A: Reverse recovery time (trr) affects switching behavior and electromagnetic interference characteristics. The S1BA-E3/61T specifies 1 µs (standard recovery), while most active substitutes specify 1.8 µs. Cross-manufacturer alternatives such as ES1B-13-F (25 ns) and EGF1B (50 ns) exhibit fast recovery characteristics. For general-purpose rectification applications, these differences are not critical. Selection should be based on application-specific switching frequency and EMI requirements.

Q: Can ES1B-13-F or EGF1B be used as direct replacements?

A: These parts meet the core electrical requirements (100 V, 1 A, DO-214AC/SMA package) and are suitable for general-purpose rectification. However, they exhibit different recovery characteristics (fast recovery ≤ 500 ns vs. standard recovery > 500 ns), forward voltage specifications, and in the case of EGF1B, an extended operating temperature range (-65°C ~ 175°C). Verification of application-specific requirements is necessary before selection.

Q: Why is ES1B-LTP marked "Not For New Designs"?

A: The ES1B-LTP designation indicates the part is in mature or declining production status. While electrically functional, Micro Commercial Co recommends against using this part in new designs. For new applications, select from parts with "Active" product status such as S1B-E3/61T, S1B-E3/5AT, ES1B-13-F, or EGF1B.

Q: What packaging formats are available for substitutes?

A: Substitute parts are available in three packaging formats: Cut Tape (CT), Tape & Reel (TR), and Cut Tape & Digi-Reel (CT & Digi-Reel). The original S1BA-E3/61T uses Cut Tape & Digi-Reel format. The S1B-E3/61T maintains this format. Alternative formats (Tape & Reel) are available from S1B-E3/5AT, S1B-M3/5AT, S1B-M3/61T, and S1BHE3_A/I. Selection depends on manufacturing equipment compatibility and supply chain requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All Vishay S1B series parts (S1B-E3/5AT, S1B-E3/61T, S1B-M3/5AT, S1B-M3/61T, S1BHE3_A/H, S1BHE3_A/I) are ROHS3 compliant with MSL 1 rating. Cross-manufacturer alternatives ES1B-13-F and ES1B-LTP are also ROHS3 compliant. Compliance information for EGF1B and ES1B was not provided in the available data.

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