S2A-E3/5BT Equivalent & Substitute Parts

Part Overview

The S2A-E3/5BT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 50 V DC reverse voltage with 1.5 A average rectified current in a DO-214AA (SMB) package. The part is Active status and RoHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are necessary when the original part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible alternatives from different manufacturers or product lines.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	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 @ 50 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 S2A-E3/5BT are grouped based on the following electrical and mechanical parameters that determine functional compatibility:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 1.5 A
Package / Case: Must be DO-214AA (SMB) or compatible surface mount package
Mounting Type: Must be Surface Mount
Technology: Standard or Schottky rectifier diodes
RoHS Status: Must be ROHS3 Compliant

Grouping Categories:

Direct Parametric Equivalents: Parts with identical voltage and current ratings, same package, and standard technology. These provide one-to-one functional replacement with minimal circuit impact.

Packaging Variants: Parts with identical electrical specifications but different tape and reel formats (Tape & Reel vs. Cut Tape & Digi-Reel®). These are functionally equivalent but differ in supply format.

Current Upgrades: Parts with higher current ratings (2 A or 3 A) at the same voltage. These provide enhanced current capacity while maintaining voltage compatibility and are suitable for designs requiring additional margin.

Technology Alternatives: Schottky diodes with higher voltage and current ratings. These offer lower forward voltage drop and faster recovery characteristics but operate at different electrical parameters.

Package Variants: Parts using alternative surface mount packages (DO-214AC/SMA) with compatible electrical specifications. These require PCB layout modification but maintain electrical functionality.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Package	Technology	Packaging Format
S2A-E3/5BT	Vishay General Semiconductor	50	1.5	1.15 @ 1.5 A	2 µs	DO-214AA, SMB	Standard	Tape & Reel (TR)
S2A-E3/52T	Vishay General Semiconductor	50	1.5	1.15 @ 1.5 A	2 µs	DO-214AA, SMB	Standard	Cut Tape (CT) & Digi-Reel®
S2A-13-F	Diodes Incorporated	50	1.5	1.15 @ 1.5 A	Standard Recovery	DO-214AA, SMB	Standard	Cut Tape (CT) & Digi-Reel®
RS2A-13-F	Diodes Incorporated	50	1.5	1.3 @ 1.5 A	150 ns	DO-214AC, SMA	Standard	Tape & Reel (TR)
ES2A-13-F	Diodes Incorporated	50	2	920 mV @ 2 A	25 ns	DO-214AA, SMB	Standard	Tape & Reel (TR)
S2A	Diotec Semiconductor	50	2	1.15 @ 2 A	1.5 µs	DO-214AA, SMB	Standard	—
S3AB-13-F	Diodes Incorporated	50	3	1.15 @ 3 A	Standard Recovery	DO-214AA, SMB	Standard	Cut Tape (CT) & Digi-Reel®
STPS3L60U	STMicroelectronics	60	3	620 mV @ 3 A	≤ 500 ns	DO-214AA, SMB	Schottky	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Direct Replacement (Identical Specifications):

S2A-E3/52T is a direct parametric equivalent to S2A-E3/5BT. Both parts are manufactured by Vishay General Semiconductor with identical electrical specifications (50 V, 1.5 A, 1.15 V forward voltage, 2 µs recovery time). The only difference is packaging format: S2A-E3/52T is supplied in Cut Tape & Digi-Reel® format versus Tape & Reel for the original part. Selection depends on manufacturing process requirements.

S2A-13-F (Diodes Incorporated) provides equivalent electrical performance with identical voltage, current, and forward voltage specifications. This part is Active status and RoHS3 compliant. It is suitable for direct substitution in applications where manufacturer source diversification is acceptable.

Current Upgrade Options (Higher Current Capacity):

ES2A-13-F and S2A (Diotec) both provide 2 A current capacity at 50 V, representing a 33% increase over the 1.5 A rating. Both maintain the DO-214AA (SMB) package and RoHS3 compliance. These parts are suitable for designs where additional current margin is required without circuit modification.

S3AB-13-F provides 3 A current capacity at 50 V, representing a 100% increase over the original 1.5 A rating. This part maintains DO-214AA (SMB) package compatibility and RoHS3 compliance. Selection is appropriate for applications requiring significant current headroom.

Package Variant (Alternative Surface Mount Package):

RS2A-13-F operates at identical voltage and current specifications (50 V, 1.5 A) but uses DO-214AC (SMA) package instead of DO-214AA (SMB). This part requires PCB layout modification due to different package footprint. It is Active status and RoHS3 compliant. Selection requires verification of PCB design compatibility.

Technology Alternative (Schottky Diode):

STPS3L60U is a Schottky diode manufactured by STMicroelectronics with 60 V reverse voltage and 3 A current capacity. This part offers lower forward voltage (620 mV @ 3 A) and faster recovery characteristics (≤ 500 ns) compared to the standard rectifier technology of the original part. The DO-214AA (SMB) package is compatible. This part is suitable for applications where reduced forward voltage drop and faster switching are beneficial, provided circuit design accommodates the different electrical characteristics.

All substitute parts listed are Active status and RoHS3 compliant, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can S2A-E3/52T be used as a direct replacement for S2A-E3/5BT?

A: Yes. S2A-E3/52T is a direct parametric equivalent with identical electrical specifications (50 V, 1.5 A, 1.15 V forward voltage, 2 µs recovery time) and the same DO-214AA (SMB) package. The difference is packaging format: S2A-E3/52T uses Cut Tape & Digi-Reel® supply while S2A-E3/5BT uses Tape & Reel. Selection depends on manufacturing equipment compatibility.

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

A: Recovery time refers to how quickly the diode transitions from conducting to blocking state. Standard recovery diodes (>500 ns) are suitable for general-purpose rectification. Fast recovery diodes (≤ 500 ns) switch faster and generate less switching noise, beneficial in high-frequency applications. Both types are electrically compatible at the specified voltage and current ratings.

Q: Can I use ES2A-13-F or S3AB-13-F as replacements if my circuit only requires 1.5 A?

A: Yes. ES2A-13-F (2 A) and S3AB-13-F (3 A) both exceed the 1.5 A requirement of the original part. Higher current-rated diodes operate within specification at lower current levels. Both maintain 50 V voltage rating and DO-214AA (SMB) package compatibility. This provides additional design margin without circuit modification.

Q: Why is STPS3L60U listed as a substitute if it has different electrical characteristics?

A: STPS3L60U is a Schottky technology alternative with 60 V reverse voltage (exceeding the 50 V requirement) and 3 A current capacity (exceeding the 1.5 A requirement). The lower forward voltage (620 mV vs. 1.15 V) and faster recovery characteristics may be beneficial in specific applications. However, circuit design must accommodate these different electrical parameters. This part is suitable only when Schottky diode characteristics are acceptable.

Q: What does the DO-214AA (SMB) package designation mean?

A: DO-214AA is the industry standard package designation for surface mount diodes in the SMB (Small Molded Body) form factor. All substitute parts listed use either DO-214AA (SMB) or DO-214AC (SMA) packages, which are surface mount packages suitable for automated assembly. DO-214AC (SMA) is a smaller variant requiring different PCB footprint.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 compliant, meeting current regulatory requirements for hazardous substance restrictions in electronic components.

Q: Can RS2A-13-F be used without PCB modification?

A: No. RS2A-13-F uses DO-214AC (SMA) package, which has a different footprint than the DO-214AA (SMB) package of the original part. PCB layout modification is required. However, electrical specifications are identical (50 V, 1.5 A, 1.15 V forward voltage), so circuit functionality remains unchanged after layout adjustment.

Q: What inventory levels are available for substitute parts?

A: Inventory availability varies by part number. S2A-E3/52T has 40,400 pieces in stock. S2A-13-F has 30,620 pieces. S3AB-13-F has 38,200 pieces. STPS3L60U has 80,200 pieces. Specific inventory should be verified at time of procurement.

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