S3J Equivalent & Substitute Parts

Part Overview

The S3J is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. The device features standard recovery characteristics with a reverse recovery time of 2.5 µs and operates across a junction temperature range of -55°C to 150°C. The S3J is classified as "Not For New Designs," indicating that while the part remains available in inventory, alternative solutions with active product status are preferred for new circuit development. Equivalent and substitute parts provide functionally compatible alternatives with comparable electrical ratings and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A	V
Reverse Recovery Time (trr)	2.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the S3J are grouped based on strict electrical and mechanical compatibility criteria. All substitute parts must meet the following requirements:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 3 A minimum
Package / Case: DO-214AB, SMC (surface mount)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Within acceptable operating range for circuit design
Reverse Recovery Time (trr): Determines switching speed classification (Standard or Fast Recovery)
Current - Reverse Leakage @ Vr: Leakage characteristics at rated voltage
Operating Temperature - Junction: Thermal operating range

Parts are classified as direct equivalents when they share identical base product numbers or manufacturers, or as similar alternatives when they meet all primary criteria with variations in secondary parameters. Parts with current ratings exceeding 3 A or operating temperature ranges broader than the S3J are included as functional alternatives for applications requiring enhanced performance margins.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Ir @ Vr [µA]	Tj (°C)	Product Status
S3J	onsemi	600	3	1.2 @ 3A	2.5 µs	5 @ 600V	-55 to 150	Not For New Designs
MURS360T3G	onsemi	600	3	1.25 @ 3A	75 ns	10 @ 600V	-65 to 175	Active
S3J-TP	Micro Commercial Co	600	3	1.2 @ 3A	2.5 µs	10 @ 600V	-55 to 150	Active
ER3J-TP	Micro Commercial Co	600	3	1.7 @ 3A	35 ns	5 @ 600V	-50 to 175	Active
RS3J-13-F	Diodes Incorporated	600	3	1.3 @ 3A	250 ns	5 @ 600V	-65 to 150	Active
S3J-13-F	Diodes Incorporated	600	3	1.15 @ 3A	2.5 µs	10 @ 600V	-65 to 150	Active
S3J-E3/57T	Vishay General Semiconductor - Diodes Division	600	3	1.15 @ 2.5A	2.5 µs	10 @ 600V	-55 to 150	Active
SMLJ60S6-TP	Micro Commercial Co	600	6	1.0 @ 6A	2.5 µs	5 @ 600V	-55 to 150	Active
STTH2R06S	STMicroelectronics	600	2	1.7 @ 2A	50 ns	2 @ 600V	-40 to 175	Active
STTH3L06S	STMicroelectronics	600	3	1.3 @ 3A	85 ns	3 @ 600V	-40 to 175	Active
STTH3R06S	STMicroelectronics	600	3	1.7 @ 3A	35 ns	3 @ 600V	-40 to 175	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended for Replacement):

The S3J-TP (Micro Commercial Co) and S3J-13-F (Diodes Incorporated) are direct equivalents sharing the S3J base product number. Both parts are classified as Active products, making them suitable for new designs. S3J-TP maintains identical electrical characteristics to the original S3J, including forward voltage and recovery time specifications. S3J-13-F offers a slightly lower forward voltage (1.15 V vs. 1.2 V) while maintaining standard recovery characteristics and extends the operating temperature range to -65°C.

Active Alternatives with Comparable Performance:

The S3J-E3/57T (Vishay) provides electrical equivalence with active product status and extends the lower operating temperature limit to -55°C. The STTH3L06S and STTH3R06S (STMicroelectronics) offer fast recovery characteristics (85 ns and 35 ns respectively) with improved reverse leakage performance (3 µA) and extended temperature range to 175°C maximum. These parts are suitable when faster switching performance is required.

Higher Current Alternative:

The SMLJ60S6-TP (Micro Commercial Co) provides a 6 A current rating while maintaining 600 V voltage rating and standard recovery characteristics. This part is applicable for applications requiring current margin above the 3 A specification.

Lower Current Alternative:

The STTH2R06S (STMicroelectronics) is rated for 2 A and is not recommended as a direct replacement for 3 A applications. This part is listed for reference only and does not meet the primary current requirement.

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can I use STTH2R06S as a substitute for S3J?

A: No. The STTH2R06S is rated for 2 A average rectified current, which does not meet the 3 A requirement of the S3J. Using an undersized component creates risk of thermal stress and component failure. The STTH2R06S is included in this reference for informational purposes only.

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

A: Recovery speed is determined by reverse recovery time (trr). The S3J has a standard recovery time of 2.5 µs (2500 ns). Fast recovery alternatives such as STTH3L06S (85 ns) and STTH3R06S (35 ns) switch more rapidly, reducing switching losses in high-frequency applications. Standard recovery parts are suitable for line-frequency and low-frequency rectification circuits.

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

A: All listed substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical compatibility with the S3J footprint. Packaging format variations (Cut Tape vs. Tape & Reel) do not affect electrical performance or PCB mounting compatibility.

Q: Why is the S3J marked "Not For New Designs"?

A: This designation indicates that while the S3J remains available in inventory, onsemi recommends using alternative products for new circuit development. Active alternatives such as S3J-TP, S3J-13-F, and MURS360T3G provide equivalent or enhanced performance with ongoing manufacturer support.

Q: Can I use SMLJ60S6-TP in place of S3J?

A: Yes, with design consideration. The SMLJ60S6-TP provides 6 A current capacity, exceeding the 3 A requirement, and maintains 600 V voltage rating and standard recovery characteristics. This part is suitable when additional current margin is required. Verify that the higher current rating does not introduce unintended circuit behavior in current-limiting applications.

Q: What is the significance of forward voltage (Vf) differences between substitute parts?

A: Forward voltage affects power dissipation and voltage drop across the diode during conduction. The S3J specifies 1.2 V @ 3 A. Substitutes range from 1.0 V to 1.7 V at rated current. Lower Vf reduces heat generation; higher Vf increases power loss. Select based on circuit thermal budget and voltage drop tolerance.

Q: Do all substitute parts support the same temperature range as S3J?

A: No. The S3J operates from -55°C to 150°C. Several alternatives extend the upper limit to 175°C (MURS360T3G, ER3J-TP, STTH3L06S, STTH3R06S) or lower limit to -65°C (MURS360T3G, RS3J-13-F, S3J-13-F). Verify that the selected substitute meets the thermal requirements of the target application.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the S3J specification. All parts also maintain MSL 1 (Unlimited) moisture sensitivity rating.

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