S2BA-13 Equivalent & Substitute Parts

Part Overview

The S2BA-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 100 V DC reverse voltage and 1.5 A average rectified current in a surface mount SMA package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part operates across a junction temperature range of -65°C to 150°C and exhibits standard recovery characteristics with a maximum forward voltage of 1.15 V at 1.5 A.

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
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Capacitance @ Vr, F	20	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 150	°C
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the S2BA-13 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 1.5 A minimum
Package / Case: DO-214AC, SMA (surface mount compatibility)
Mounting Type: Surface Mount
Operating Temperature Range: Must encompass or exceed -65°C to 150°C

Parametric Equivalent Classification: The S2BA-13-F meets all primary criteria with identical electrical ratings and packaging. This part is a direct parametric equivalent differing only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and compliance status.

Manufacturer Recommended Substitute Classification: The RS1B-E3/5AT from Vishay General Semiconductor - Diodes Division is classified as a manufacturer-recommended substitute. While this part maintains the 100 V reverse voltage rating and DO-214AC/SMA package, it operates at a reduced average rectified current of 1 A (versus 1.5 A) and exhibits faster recovery characteristics (≤500 ns versus >500 ns). This part is suitable for applications where the 1 A current rating is sufficient and faster switching performance is acceptable or beneficial.

Parameter Comparison

Parameter	S2BA-13 (Main)	S2BA-13-F (Parametric Equivalent)	RS1B-E3/5AT (Manufacturer Recommended)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	1.15 V @ 1.5 A	1.3 V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Fast Recovery ≤500ns, > 200mA (Io)
Reverse Recovery Time (trr)	Not specified	Not specified	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V
Capacitance @ Vr, F	20 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature - Junction	-65°C to 150°C	-65°C to 150°C	-55°C to 150°C
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalent): The S2BA-13-F is the preferred substitute when component availability and design continuity are primary concerns. This part maintains identical electrical specifications and operating temperature range. The S2BA-13-F is currently in active production status with 30,200 units in stock and carries ROHS3 compliance certification, addressing regulatory requirements that the original S2BA-13 does not meet.

For Current-Limited Applications (Manufacturer Recommended): The RS1B-E3/5AT is suitable for applications where the average rectified current requirement does not exceed 1 A. This part offers faster recovery characteristics (150 ns reverse recovery time) and lower junction capacitance (10 pF), which may provide performance benefits in high-frequency switching applications. The operating temperature minimum of -55°C (versus -65°C) must be evaluated against application requirements. This part is also ROHS3 compliant and maintains active production status with 15,300 units in stock.

Compliance Considerations: Both substitute parts carry ROHS3 compliance certification, whereas the original S2BA-13 is RoHS non-compliant. Selection should account for regulatory requirements in the target application and end-use market.

Frequently Asked Questions (FAQ)

Q: Can the S2BA-13-F be used as a direct drop-in replacement for the S2BA-13?

A: Yes. The S2BA-13-F is a parametric equivalent with identical electrical ratings (100 V, 1.5 A), forward voltage characteristics, reverse leakage, capacitance, and operating temperature range. The only differences are packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and RoHS compliance status. Both parts use the DO-214AC/SMA surface mount package.

Q: What are the limitations of using the RS1B-E3/5AT as a substitute?

A: The RS1B-E3/5AT has a reduced average rectified current rating of 1 A compared to the S2BA-13's 1.5 A rating. This part is suitable only for applications where the circuit current does not exceed 1 A. Additionally, the minimum operating temperature is -55°C rather than -65°C. The forward voltage at rated current is higher (1.3 V @ 1 A versus 1.15 V @ 1.5 A), and junction capacitance is lower (10 pF versus 20 pF).

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. Both the S2BA-13-F and RS1B-E3/5AT use the DO-214AC/SMA surface mount package, which provides identical PCB footprint compatibility with the original S2BA-13.

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

A: The S2BA-13 and S2BA-13-F employ standard recovery characteristics (>500 ns), while the RS1B-E3/5AT uses fast recovery technology (≤500 ns). Fast recovery diodes exhibit shorter reverse recovery time (150 ns for the RS1B-E3/5AT), reducing switching losses and enabling operation at higher frequencies. Standard recovery diodes are typically used in lower-frequency rectification applications.

Q: Does the lower capacitance of the RS1B-E3/5AT affect circuit performance?

A: The RS1B-E3/5AT exhibits 10 pF capacitance at 4 V, 1 MHz, compared to 20 pF for the S2BA-13. Lower capacitance reduces parasitic effects and may improve performance in high-frequency applications. For low-frequency rectification circuits, this difference is typically negligible.

Q: Are there any RoHS compliance implications when substituting the S2BA-13?

A: The original S2BA-13 is RoHS non-compliant. Both substitute parts (S2BA-13-F and RS1B-E3/5AT) are ROHS3 compliant. If the application or end market requires RoHS compliance, either substitute part addresses this requirement.

Q: What inventory considerations should guide part selection?

A: The S2BA-13-F has 30,200 units in stock, while the RS1B-E3/5AT has 15,300 units in stock. For applications requiring the full 1.5 A rating, the S2BA-13-F offers superior availability. The RS1B-E3/5AT should be selected only when its reduced current rating and faster recovery characteristics align with circuit requirements.

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