S2A-TP Equivalent & Substitute Parts

Part Overview

The S2A-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

The S2A-TP operates across a junction temperature range of -55°C to 150°C and exhibits standard recovery characteristics with a reverse recovery time of 2 µs. The part is RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level).

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	10	µA @ 50 V
Speed Classification	Standard Recovery >500ns, > 200mA (Io)	-
Package / Case	DO-214AA, SMB	-
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

Substitution of the S2A-TP is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 50 V or greater to ensure safe operation in the original circuit.

Current Rating: The average rectified current (Io) determines thermal and electrical compatibility. The S2A-TP is rated for 2 A. Substitutes with lower current ratings (1 A or 1.5 A) are acceptable for applications where the circuit does not require the full 2 A capacity. Substitutes with equal or higher current ratings provide direct replacement capability.

Package and Mounting: All substitutes must use surface mount technology in DO-214AA (SMB) or compatible packages (DO-214AC for SMA variants) to ensure PCB compatibility.

Recovery Characteristics: The S2A-TP uses standard recovery (>500 ns). Substitutes with fast recovery (≤500 ns) are electrically compatible and offer improved performance characteristics.

Temperature Range: Operating temperature ranges must encompass the application requirements. The S2A-TP operates from -55°C to 150°C.

Compliance: All substitutes must maintain RoHS3 compliance and MSL 1 rating for manufacturing compatibility.

Parameter Comparison

Parameter	S2A-TP (Micro Commercial Co)	S2A-13-F (Diodes Inc)	RS2A-13-F (Diodes Inc)	SURS8105T3G-VF01 (onsemi)	S2A (Diotec)	S2A R5G (Taiwan Semiconductor)
Manufacturer	Micro Commercial Co	Diodes Incorporated	Diodes Incorporated	onsemi	Diotec Semiconductor	Taiwan Semiconductor Corporation
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	2 A	1.5 A	1.5 A	1 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2 A	1.15 V @ 1.5 A	1.3 V @ 1.5 A	875 mV @ 1 A	1.15 V @ 2 A	1.15 V @ 2 A
Speed Classification	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Standard Recovery >500ns	Standard Recovery >500ns
Reverse Recovery Time (trr)	2 µs	-	150 ns	35 ns	1.5 µs	1.5 µs
Current - Reverse Leakage @ Vr	10 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	2 µA @ 50 V	5 µA @ 50 V	1 µA @ 50 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AC, SMA	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction	-55 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 175°C	-50 to 150°C	-55 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Direct Equivalents (Full Current Replacement)

The S2A (Diotec Semiconductor) and S2A R5G (Taiwan Semiconductor Corporation) are parametric equivalents to the S2A-TP. Both maintain the 2 A current rating, 50 V voltage rating, and DO-214AA package. The Diotec S2A is currently active in production, while the S2A R5G is discontinued at DiGi Electronics. Both parts are RoHS3 compliant with appropriate MSL ratings.

Reduced Current Substitutes (1.5 A Rating)

The S2A-13-F (Diodes Incorporated) provides a direct substitute with 1.5 A current rating in DO-214AA package. This part is active and widely available. The RS2A-13-F (Diodes Incorporated) offers similar electrical characteristics but uses a DO-214AC (SMA) package and exhibits fast recovery characteristics. Package compatibility must be verified for PCB layout.

Reduced Current Substitute with Enhanced Performance (1 A Rating)

The SURS8105T3G-VF01 (onsemi) is rated for 1 A average rectified current with fast recovery characteristics (35 ns trr). This part includes AEC-Q101 automotive qualification and operates across an extended temperature range (-65°C to 175°C). The lower current rating restricts this part to applications where 1 A capacity is sufficient.

Availability and Compliance Considerations

The S2A (Diotec) represents the most direct active substitute with full 2 A capacity and standard recovery characteristics matching the original design. The S2A-13-F (Diodes Incorporated) offers the highest inventory availability (30,620 pcs) among active parts, though with reduced current rating. All recommended substitutes maintain RoHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can the S2A-13-F (1.5 A) replace the S2A-TP (2 A) in all applications?

A: The S2A-13-F is suitable for applications where the circuit current does not exceed 1.5 A. If the original design requires the full 2 A capacity, the S2A-13-F will operate at reduced thermal margin. The S2A (Diotec) or S2A R5G maintain the full 2 A rating and are preferred for designs requiring maximum current capacity.

Q: What is the difference between DO-214AA (SMB) and DO-214AC (SMA) packages?

A: Both are surface mount rectifier packages with different physical dimensions. DO-214AA (SMB) and DO-214AC (SMA) have different footprints on the PCB. The RS2A-13-F uses DO-214AC (SMA) and requires PCB layout verification before substitution. The S2A-13-F uses DO-214AA (SMB) and is directly compatible with the original S2A-TP footprint.

Q: Does fast recovery (≤500 ns) provide advantages over standard recovery (>500 ns)?

A: Fast recovery diodes exhibit lower reverse recovery time, reducing switching losses and electromagnetic interference in high-frequency applications. The RS2A-13-F (150 ns) and SURS8105T3G-VF01 (35 ns) offer improved performance in switching circuits. For linear rectification applications, standard recovery characteristics are sufficient.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitutes (S2A-13-F, RS2A-13-F, SURS8105T3G-VF01, S2A Diotec, and S2A R5G) are RoHS3 compliant and maintain MSL 1 (unlimited) moisture sensitivity level, ensuring manufacturing compatibility with the original design.

Q: What is the temperature operating range difference between substitutes?

A: The S2A-TP operates from -55°C to 150°C. The S2A-13-F and RS2A-13-F extend the lower limit to -65°C. The SURS8105T3G-VF01 extends the upper limit to 175°C. The Diotec S2A operates from -50°C to 150°C. Application temperature requirements determine whether extended ranges are necessary.

Q: Which substitute offers the best availability?

A: The S2A-13-F (Diodes Incorporated) has the highest inventory availability at 30,620 pcs in stock. The S2A (Diotec) has 7,004 pcs available. Both are active products with reliable supply chains.

Q: Can the SURS8105T3G-VF01 (1 A) be used in place of the S2A-TP (2 A)?

A: The SURS8105T3G-VF01 is suitable only for applications where the circuit current does not exceed 1 A. This part includes AEC-Q101 automotive qualification and fast recovery characteristics, making it suitable for automotive and high-frequency switching applications with lower current requirements.

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