Taiwan Semiconductor Corporation S4A V7G

Overview

S4A V7G from Taiwan Semiconductor is a 4A, 50V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring 1.15V max forward voltage at 4A, 100A peak surge current, and 150°C max junction temperature-used in AC/DC front-end rectification for compact switching power supplies.

For engineers reviewing the S4A V7G datasheet, S4A V7G pinout, S4A V7G application, or S4A V7G equivalent, key selection criteria include repetitive peak reverse voltage (50V), thermal resistance (13°C/W junction-to-lead), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and tape-and-reel packaging for automated assembly.

Technical Context

This single-die standard recovery rectifier operates with a 1500ns reverse recovery time under IF = 0.5A, IR = 1.0A, Irr = 0.25A conditions and exhibits 60pF junction capacitance at 1MHz and 4V reverse bias-suited for non-critical switching applications below 100kHz where low conduction loss outweighs fast recovery needs.

Its glass-passivated junction ensures stable leakage performance (≤10µA at 25°C, ≤250µA at 125°C) and robust surge handling (100A IFSM, 8.3ms half-sine), while the matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicating band; molded UL 94V-0 compound; matte tin-plated leads; polarity marked by cathode band on body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR450 and VS-4EY50, the S4A V7G delivers the lowest forward voltage among 4A/50V DO-214AB rectifiers while maintaining industry-standard trr and superior leakage performance-making it optimal for thermally sensitive, cost-driven AC/DC and DC/DC input stages.

Availability

S4A V7G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and industrial DC-DC converters requiring stable component supply, J-STD-020 Level 1 moisture handling, and RoHS-compliant sourcing.

Supply support for S4A V7G 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, serving industrial, computing, and consumer markets since 1979.

The S4A V7G belongs to TSC's S4x series of general-purpose surface-mount rectifiers-designed specifically for cost-efficient, thermally robust AC/DC and DC/DC front-end rectification in high-volume power conversion applications.

FAQ

What is the maximum junction temperature rating for the S4A V7G?

The S4A V7G has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet. This allows sustained operation in high-ambient environments when mounted on adequate PCB copper area. Thermal derating begins above 75°C lead temperature, and the device must not exceed 150°C junction temperature under any operating condition. The S4A V7G's RθJL of 13°C/W supports effective heat transfer to the PCB.

Is the S4A V7G RoHS and halogen-free compliant?

Yes, the S4A V7G is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. These compliance statements are explicitly confirmed in the "Features" section of the Taiwan Semiconductor datasheet (Version K2102). The device uses matte tin-plated leads and UL 94V-0 molding compound, and no brominated flame retardants or chlorine-based compounds are present in its construction. S4A V7G meets environmental requirements for global commercial and industrial deployment.

What does the "V7G" suffix indicate in S4A V7G?

The "V7G" suffix in S4A V7G denotes Taiwan Semiconductor's internal date code and factory marking: "V" indicates year code (2022), "7" is week code (week 7), and "G" identifies the fabrication facility. This matches the "YW" (date code) and "F" (factory code) fields shown in the official package marking diagram. The base device remains S4A-a 4A, 50V rectifier-and the suffix does not affect electrical specifications, package, or reliability grading.

Can the S4A V7G replace a 1N4007 in a new design?

No-the S4A V7G is not a drop-in replacement for the 1N4007. While both are standard recovery rectifiers, the S4A V7G is rated for 50V VRRM versus 1N4007's 1000V, and uses DO-214AB (SMC) surface-mount packaging versus 1N4007's axial DO-41. The S4A V7G's 4A IF rating exceeds 1N4007's 1A, but its lower voltage rating and SMT-only form factor require PCB redesign. Use S4A V7G only where 50V isolation suffices and SMT assembly is employed.

What is the reverse recovery time (trr) specification for the S4A V7G?

The S4A V7G has a reverse recovery time (trr) of 1500 ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A per the Electrical Specifications table. This value is typical for standard recovery rectifiers and confirms suitability for line-frequency and low-to-moderate switching frequency applications (<100 kHz). The trr is not guaranteed to improve with temperature or current reduction; designers must account for this fixed recovery behavior in EMI filtering and snubber design. S4A V7G's trr is identical across the S4x family.