S2JA-13 Equivalent & Substitute Parts

Part Overview

The S2JA-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 600 V DC reverse voltage and 1.5 A average rectified current in a surface mount SMA package (DO-214AC). This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C

Substitute Part Grouping Explanation

Substitution of the S2JA-13 is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage rating of 600 V to ensure circuit protection and reliability.

Current Rating: Substitute parts are grouped into two categories: direct equivalents at 1.5 A (S2JA-13-F) and higher-current alternatives at 2 A (STTH2L06A, STTH2R06A) that provide design margin. Lower-current alternatives at 1 A (STTH1L06A, STTH1R06A) are suitable only for applications with reduced current requirements.

Package Compatibility: All substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts.

Recovery Speed: Substitute parts are available in both standard recovery (>500 ns) and fast recovery (≤500 ns) configurations. Selection depends on application switching frequency requirements.

Temperature Range: Operating temperature ranges vary among substitutes. The original part operates from -65°C to 150°C; substitutes extend to 175°C maximum junction temperature.

Product Status and Compliance: Direct equivalent S2JA-13-F is active and RoHS3 compliant. All STMicroelectronics and Vishay alternatives are active with RoHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Reverse Leakage @ Vr	Package	Product Status	RoHS Status
S2JA-13	Diodes Incorporated	600 V	1.5 A	1.15 V @ 1.5 A	Standard >500ns	5 µA @ 600 V	DO-214AC, SMA	Discontinued	Non-compliant
S2JA-13-F	Diodes Incorporated	600 V	1.5 A	1.15 V @ 1.5 A	Standard >500ns	5 µA @ 600 V	DO-214AC, SMA	Active	RoHS3 Compliant
BYG24J-E3/TR	Vishay General Semiconductor	600 V	1.5 A	1.25 V @ 1.5 A	Fast ≤500ns	1 µA @ 600 V	DO-214AC, SMA	Active	RoHS3 Compliant
STTH1L06A	STMicroelectronics	600 V	1 A	1.3 V @ 1 A	Fast ≤500ns	1 µA @ 600 V	DO-214AC, SMA	Active	RoHS3 Compliant
STTH1R06A	STMicroelectronics	600 V	1 A	1.7 V @ 1 A	Fast ≤500ns	1 µA @ 600 V	DO-214AC, SMA	Active	RoHS3 Compliant
STTH2L06A	STMicroelectronics	600 V	2 A	1.3 V @ 2 A	Fast ≤500ns	2 µA @ 600 V	DO-214AC, SMA	Active	RoHS3 Compliant
STTH2R06A	STMicroelectronics	600 V	2 A	1.7 V @ 2 A	Fast ≤500ns	2 µA @ 600 V	DO-214AC, SMA	Active	RoHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended for Immediate Replacement):

S2JA-13-F is the direct functional equivalent of the discontinued S2JA-13. Both parts share identical electrical specifications: 600 V reverse voltage, 1.5 A average rectified current, 1.15 V forward voltage at 1.5 A, and standard recovery speed. S2JA-13-F is currently active with RoHS3 compliance and available in Tape & Reel packaging. This part requires no circuit redesign and provides the most straightforward replacement path.

Alternative with Enhanced Performance (Vishay):

BYG24J-E3/TR from Vishay General Semiconductor maintains the same voltage and current ratings as the original S2JA-13 but offers improved performance characteristics. It features fast recovery speed (≤500 ns) compared to the standard recovery of the original part, and exhibits lower reverse leakage current (1 µA versus 5 µA at 600 V). Forward voltage is slightly elevated at 1.25 V @ 1.5 A. This part is active and RoHS3 compliant.

Higher Current Alternatives (STMicroelectronics):

STTH2L06A and STTH2R06A are rated for 2 A average rectified current, providing 33% additional current capacity over the original 1.5 A specification. Both maintain 600 V reverse voltage and DO-214AC packaging. STTH2L06A offers lower forward voltage (1.3 V @ 2 A) with 85 ns reverse recovery time. STTH2R06A provides faster recovery (50 ns) at the cost of higher forward voltage (1.7 V @ 2 A). Both are active and RoHS3 compliant. These parts are suitable for applications where increased current margin is beneficial.

Lower Current Alternatives (STMicroelectronics):

STTH1L06A and STTH1R06A are rated for 1 A average rectified current, representing a 33% reduction from the original 1.5 A specification. Both maintain 600 V reverse voltage and DO-214AC packaging. STTH1L06A features lower forward voltage (1.3 V @ 1 A) with 80 ns reverse recovery time. STTH1R06A provides faster recovery (45 ns) at higher forward voltage (1.7 V @ 1 A). Both are active and RoHS3 compliant. These parts are suitable only for applications with confirmed current requirements below 1 A.

Compliance Considerations:

All recommended substitutes are RoHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The original S2JA-13 is RoHS non-compliant; migration to any substitute improves regulatory compliance posture.

Frequently Asked Questions (FAQ)

Q: Can S2JA-13-F be used as a direct replacement for S2JA-13?

A: Yes. S2JA-13-F is electrically and mechanically identical to S2JA-13, with identical voltage rating (600 V), current rating (1.5 A), forward voltage (1.15 V @ 1.5 A), and package (DO-214AC, SMA). The primary difference is product status (active versus discontinued) and RoHS compliance (RoHS3 compliant versus non-compliant). No circuit modifications are required.

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

A: Recovery speed refers to the time required for a diode to transition from conducting to blocking state. Standard recovery diodes (>500 ns) are suitable for low-frequency applications and power supplies. Fast recovery diodes (≤500 ns) are designed for higher-frequency switching applications and reduce switching losses. The S2JA-13 uses standard recovery; fast recovery alternatives (BYG24J-E3/TR, STTH series) are suitable for applications with switching frequencies above approximately 10 kHz.

Q: Can I use STTH2L06A or STTH2R06A in place of S2JA-13?

A: Yes, with design margin consideration. Both parts maintain the 600 V reverse voltage rating and DO-214AC package. The 2 A current rating exceeds the original 1.5 A specification, providing 33% additional capacity. Forward voltage characteristics differ slightly (1.3 V or 1.7 V @ 2 A versus 1.15 V @ 1.5 A), which may affect power dissipation calculations. These parts are suitable for applications where the original 1.5 A rating was conservative or where increased current margin is desired.

Q: Can I use STTH1L06A or STTH1R06A in place of S2JA-13?

A: Only if the application current requirement is confirmed to be 1 A or less. Both parts are rated for 1 A average rectified current, which is 33% below the original 1.5 A specification. Using these parts in a 1.5 A application would exceed their current rating and compromise reliability. Forward voltage characteristics also differ (1.3 V or 1.7 V @ 1 A versus 1.15 V @ 1.5 A).

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical compatibility with existing PCB layouts. Packaging format differs: S2JA-13-F is available in Tape & Reel (TR); BYG24J-E3/TR is available in Tape & Reel; STMicroelectronics parts (STTH series) are available in Cut Tape (CT) & Digi-Reel format. These packaging differences do not affect electrical performance or PCB mounting.

Q: What is the temperature operating range for each substitute?

A: S2JA-13 operates from -65°C to 150°C junction temperature. S2JA-13-F maintains the same range. BYG24J-E3/TR operates from -55°C to 150°C. All STMicroelectronics parts (STTH1L06A, STTH1R06A, STTH2L06A, STTH2R06A) operate to a maximum junction temperature of 175°C, with STTH2R06A specifying -40°C to 175°C. For applications requiring operation below -55°C, S2JA-13-F is the only suitable substitute.

Q: How do reverse leakage current specifications compare?

A: S2JA-13 specifies 5 µA @ 600 V reverse leakage. S2JA-13-F maintains this specification. All other substitutes (BYG24J-E3/TR, STTH1L06A, STTH1R06A) specify 1 µA @ 600 V, representing lower leakage. STTH2L06A and STTH2R06A specify 2 µA @ 600 V. Lower reverse leakage improves circuit performance in high-impedance applications and reduces standby power consumption.

Q: What is the significance of forward voltage differences among substitutes?

A: Forward voltage affects power dissipation and voltage drop across the diode during conduction. S2JA-13 specifies 1.15 V @ 1.5 A. BYG24J-E3/TR specifies 1.25 V @ 1.5 A (0.1 V higher). STMicroelectronics L-series parts specify 1.3 V (STTH1L06A @ 1 A, STTH2L06A @ 2 A), while R-series parts specify 1.7 V (STTH1R06A @ 1 A, STTH2R06A @ 2 A). Higher forward voltage increases power dissipation; lower forward voltage reduces it. Selection depends on thermal design constraints and efficiency requirements.

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