Taiwan Semiconductor Corporation S3G R7G

Overview

S3G R7G from Taiwan Semiconductor is a 400 V, 3 A surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring 100 A surge current capability, 1.15 V max forward voltage at 3 A, and 10 µA max reverse leakage at 25°C - used in AC/DC front-end rectification for offline switch-mode power supplies.

For engineers reviewing the S3G R7G datasheet, S3G R7G pinout, S3G R7G application, or S3G R7G equivalent, key selection criteria include repetitive peak reverse voltage (V_RRM = 400 V), thermal resistance (R_θJL = 13 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

This single-die standard recovery rectifier operates with a typical reverse recovery time of 1500 ns under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A conditions and exhibits 60 pF junction capacitance at 1 MHz and 4.0 V reverse bias - suitable for non-synchronous rectification where moderate switching speed and high surge robustness are prioritized over ultrafast recovery.

Its glass-passivated junction ensures stable performance across –55°C to +150°C junction temperature range, while matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements - supporting automated SMT assembly in high-reliability power adapters and lighting drivers.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicated band; molded plastic body meets UL 94V-0; weight ≈ 0.210 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar standard recovery rectifier applications.

Compared with STTH3L04S and ES3G, the S3G R7G delivers superior surge current handling (100 A) and lower forward voltage (≤1.15 V), making it preferred for cost-sensitive, thermally constrained, and line-transient-prone offline power supplies - despite its slower 1500 ns recovery.

Availability

S3G R7G is available at Aetrix Electronics and suitable for offline AC/DC adapters, LED driver power supplies, and industrial SMPS front ends requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for S3G R7G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The S3G R7G belongs to TSC's S3x series of general-purpose surface-mount rectifiers, engineered for high surge tolerance, low forward loss, and automated assembly compatibility in cost-driven power conversion systems.

FAQ

What is the maximum junction temperature rating for the S3G R7G?

The S3G R7G has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This wide operating range allows reliable use in environments with elevated ambient temperatures, such as enclosed LED drivers or industrial power supplies. The S3G R7G must be mounted on sufficient copper area to maintain junction temperature within this limit under full 3 A load.

Is the S3G R7G RoHS and halogen-free compliant?

Yes, the S3G R7G is fully RoHS compliant and halogen-free per manufacturer specifications. Its molding compound and matte tin-plated leads meet environmental standards required for consumer and industrial electronics sold in EU, China, and other regulated markets. Compliance documentation for the S3G R7G is available upon request from Aetrix Electronics.

What does the "R7G" suffix indicate in S3G R7G?

The "R7G" suffix in S3G R7G is Taiwan Semiconductor's internal date/batch code - not an electrical variant identifier. All electrical and mechanical specifications for S3G R7G match the base S3G device: 400 V V_RRM, 3 A I_F, DO-214AB package. The S3G R7G is functionally identical to standard S3G ordering codes.

Can the S3G R7G replace a 600 V rectifier in a 230 VAC design?

No - the S3G R7G is rated for 400 V V_RRM, not 600 V. While 400 V provides adequate margin for nominal 230 VAC (peak ≈ 325 V), it falls short of the 600 V rating needed for designs requiring higher transient immunity or universal input (e.g., 230 VAC + 30% surge). Use S3J R7G (600 V) instead if 600 V blocking is specified. The S3G R7G remains valid only where 400 V is the design-specified minimum.

What is the reverse recovery time (t_rr) of the S3G R7G and how does it affect circuit performance?

The S3G R7G has a reverse recovery time (t_rr) of 1500 ns under standard test conditions (I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A). This relatively slow recovery makes it unsuitable for high-frequency (>100 kHz) synchronous rectification but ideal for 50/60 Hz and low-kHz SMPS front ends where low V_F and high I_FSM dominate design priorities. In such applications, the S3G R7G reduces conduction loss without introducing significant switching loss.