S3G-TP Equivalent & Substitute Parts

Part Overview

The S3G-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary to support existing applications, facilitate design transitions, and ensure supply chain continuity for legacy systems.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55°C ~ 150°C	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the S3G-TP are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 3 A minimum
Voltage - Forward (Vf) (Max): Must not exceed application circuit requirements
Current - Reverse Leakage @ Vr: Must not exceed 10 µA @ 400 V
Operating Temperature - Junction: Must support -55°C ~ 150°C range

Mechanical Compatibility Requirements:

Package / Case: DO-214AB (SMC) or DO-214AA (SMB) for pin-compatible alternatives
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are classified into three categories:

Direct Substitutes (Vishay RS3G Series): Parts RS3G-E3/57T, RS3G-E3/9AT, RS3G-M3/57T, and RS3G-M3/9AT meet all electrical parameters with identical voltage and current ratings. These parts feature fast recovery characteristics (≤500ns) compared to the standard recovery (>500ns) of the S3G-TP, providing improved switching performance while maintaining full electrical compatibility.

Equivalent Substitutes (Vishay S3G Series): Parts S3G-E3/57T and S3G-E3/9AT are manufactured by Vishay under the same base product number (S3G) as the original part. These maintain standard recovery speed characteristics and identical electrical specifications, with the primary difference being packaging format (Cut Tape versus Tape & Reel).

Package Variant (Diodes Incorporated S3GB-13-F): This part uses SMB (DO-214AA) package instead of SMC (DO-214AB), representing a package upgrade with larger thermal characteristics. Electrical ratings remain identical at 400 V / 3 A.

Similar Alternatives (Comchip and Central Semiconductor): Parts CFRC304-G, CMR3-04 BK PBFREE, and CMR3-04 TR13 PBFREE meet the core electrical specifications but originate from different manufacturers. These parts maintain 400 V / 3 A ratings with variations in forward voltage and recovery characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	Ir @ Vr [µA]	Package	Status	Inventory [Pcs]
S3G-TP	Micro Commercial Co	400	3	1.2 @ 3A	Standard >500ns	10 @ 400V	DO-214AB (SMC)	Not For New Designs	6327
RS3G-E3/57T	Vishay	400	3	1.3 @ 2.5A	Fast ≤500ns	10 @ 400V	DO-214AB (SMC)	Active	7818
RS3G-E3/9AT	Vishay	400	3	1.3 @ 2.5A	Fast ≤500ns	10 @ 400V	DO-214AB (SMC)	Active	4399
RS3G-M3/57T	Vishay	400	3	1.3 @ 2.5A	Fast ≤500ns	10 @ 400V	DO-214AB (SMC)	Active	846
RS3G-M3/9AT	Vishay	400	3	1.3 @ 2.5A	Fast ≤500ns	10 @ 400V	DO-214AB (SMC)	Active	924
S3G-E3/57T	Vishay	400	3	1.15 @ 2.5A	Standard >500ns	10 @ 400V	DO-214AB (SMC)	Active	30400
S3G-E3/9AT	Vishay	400	3	1.15 @ 2.5A	Standard >500ns	10 @ 400V	DO-214AB (SMC)	Active	12300
S3GB-13-F	Diodes Incorporated	400	3	1.15 @ 3A	Standard >500ns	10 @ 400V	DO-214AA (SMB)	Active	34600
CFRC304-G	Comchip Technology	400	3	1.3 @ 3A	Fast ≤500ns	5 @ 400V	DO-214AB (SMC)	Active	852
CMR3-04 BK PBFREE	Central Semiconductor	400	3	1.2 @ 3A	Standard >500ns	5 @ 400V	DO-214AB (SMC)	Active	726
CMR3-04 TR13 PBFREE	Central Semiconductor	400	3	1.2 @ 3A	Standard >500ns	5 @ 400V	DO-214AB (SMC)	Active	1323

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Characteristics):

The Vishay S3G-E3/57T and S3G-E3/9AT parts provide direct electrical equivalence to the S3G-TP with identical voltage, current, and recovery speed specifications. Both parts are Active status products with ROHS3 compliance and unlimited moisture sensitivity. S3G-E3/57T is available in Cut Tape packaging with 30,400 units in stock, while S3G-E3/9AT is available in Tape & Reel with 12,300 units in stock. These parts are recommended for applications requiring standard recovery diode characteristics.

For Enhanced Performance (Faster Recovery):

The Vishay RS3G series (RS3G-E3/57T, RS3G-E3/9AT, RS3G-M3/57T, RS3G-M3/9AT) offers fast recovery characteristics (≤500ns) while maintaining identical 400 V / 3 A electrical ratings. These parts are Active status with ROHS3 compliance. Fast recovery characteristics reduce switching losses and improve circuit efficiency compared to standard recovery devices. RS3G-E3/57T has 7,818 units available, making it the highest-inventory fast recovery option.

For Package Upgrade (Enhanced Thermal Performance):

The Diodes Incorporated S3GB-13-F provides a package upgrade from SMC (DO-214AB) to SMB (DO-214AA) with identical electrical specifications. The larger SMB package offers improved thermal dissipation characteristics. This part is Active status with ROHS3 compliance and has the highest inventory availability at 34,600 units.

For Alternative Sourcing (Multi-Vendor Strategy):

Comchip Technology CFRC304-G and Central Semiconductor CMR3-04 series parts meet core electrical specifications and provide alternative sourcing options. CFRC304-G features fast recovery characteristics with lower reverse leakage (5 µA). CMR3-04 BK PBFREE and CMR3-04 TR13 PBFREE maintain standard recovery with extended operating temperature range (-65°C ~ 175°C). All alternative parts are Active status with ROHS3 compliance.

Product Status Consideration:

All substitute parts listed carry Active product status, ensuring long-term availability and manufacturing support. The original S3G-TP is classified as "Not For New Designs," making transition to an Active substitute part necessary for new applications and recommended for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can RS3G series parts directly replace S3G-TP in existing designs?

A: Yes. RS3G series parts (RS3G-E3/57T, RS3G-E3/9AT, RS3G-M3/57T, RS3G-M3/9AT) meet all electrical specifications of the S3G-TP with identical 400 V reverse voltage, 3 A current rating, and reverse leakage characteristics. The primary difference is faster recovery time (≤500ns versus >500ns), which improves switching performance without creating compatibility issues. Pin configuration and package dimensions (DO-214AB SMC) are identical.

Q: What is the difference between S3G-E3/57T and S3G-E3/9AT?

A: Both parts are electrically identical with 400 V / 3 A specifications and standard recovery characteristics. The difference is packaging format: S3G-E3/57T is supplied in Cut Tape (CT) format with 30,400 units in stock, while S3G-E3/9AT is supplied in Tape & Reel (TR) format with 12,300 units in stock. Selection depends on assembly process requirements and volume needs.

Q: Can S3GB-13-F replace S3G-TP in the same PCB footprint?

A: No. S3GB-13-F uses SMB (DO-214AA) package while S3G-TP uses SMC (DO-214AB) package. These packages have different physical dimensions and PCB footprints. S3GB-13-F is suitable for new designs or PCB redesigns where the larger SMB package can be accommodated. The electrical specifications are identical, making it a functional upgrade for thermal performance.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance status, matching the original S3G-TP. All parts also have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Q: What is the advantage of fast recovery (RS3G) versus standard recovery (S3G) diodes?

A: Fast recovery diodes (RS3G series with ≤500ns recovery time) reduce switching losses and electromagnetic interference compared to standard recovery diodes (S3G series with >500ns recovery time). Fast recovery is beneficial in high-frequency switching applications and power factor correction circuits. Standard recovery diodes are suitable for lower-frequency rectification applications. Both types meet the 400 V / 3 A specifications of the original S3G-TP.

Q: Why do some substitute parts show lower reverse leakage current (5 µA versus 10 µA)?

A: Lower reverse leakage current (CFRC304-G and CMR3-04 series at 5 µA @ 400 V) represents improved device characteristics compared to the original specification (10 µA @ 400 V). Lower leakage reduces standby power consumption and heat generation. This is a beneficial characteristic that does not create compatibility issues; devices with lower leakage can be used in applications designed for higher leakage specifications.

Q: What inventory levels should be considered for supply chain planning?

A: S3G-E3/57T (Vishay, 30,400 units) and S3GB-13-F (Diodes Incorporated, 34,600 units) offer the highest inventory availability. RS3G-E3/57T (Vishay, 7,818 units) provides the highest inventory for fast recovery variants. CMR3-04 TR13 PBFREE (Central Semiconductor, 1,323 units) and RS3G-M3/57T (Vishay, 846 units) have lower inventory levels. For long-term supply security, parts with higher inventory levels are preferred.

Q: Are there temperature range differences between substitute parts?

A: The original S3G-TP and most substitute parts support -55°C ~ 150°C junction temperature range. CMR3-04 series parts (Central Semiconductor) extend the upper limit to 175°C, providing enhanced high-temperature performance. CFRC304-G specifies 150°C maximum without a lower limit specification. For applications requiring extended temperature range, CMR3-04 series parts are suitable.

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