Taiwan Semiconductor Corporation S4B V6G

Overview

S4B V6G from Taiwan Semiconductor is a 4A, 100V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, 100A peak surge current capability, 1.15V max forward voltage at 4A/25°C, and 10µA max reverse leakage at 25°C - used in AC/DC front-end rectification for compact switch-mode power supplies.

For engineers reviewing the S4B V6G datasheet, S4B V6G pinout, S4B V6G application, or S4B V6G equivalent, key selection criteria include repetitive peak reverse voltage (100V), thermal resistance (13°C/W junction-to-lead), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and compatibility with automated SMT placement on high-density PCBs.

Technical Context

This device is a single-die, standard recovery rectifier optimized for general-purpose switching power conversion where moderate reverse recovery time (1500ns) and low conduction loss are prioritized over ultra-fast switching. It operates across -55°C to +150°C junction temperature range and supports 8.3ms half-sine surge events up to 100A without failure.

The DO-214AB (SMC) package provides robust thermal dissipation (R_θJL = 13°C/W) and mechanical reliability with matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance, enabling stable long-term operation in industrial-grade power adapters and lighting drivers.

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 single black band on cathode end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH4L06S and MBR4100CT, the S4B V6G offers optimal balance of cost, SMT manufacturability, and thermal robustness for 50–100 kHz SMPS where standard recovery speed is sufficient and board space is constrained.

Availability

S4B V6G is available at Aetrix Electronics and suitable for AC/DC power adapters, LED lighting drivers, and industrial SMPS requiring stable component supply, J-STD-020 Level 1 moisture handling, and RoHS-compliant manufacturing.

Supply support for S4B V6G 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, MOSFETs, and bipolar transistors since 1979.

The S4B V6G belongs to TSC's S4x series of surface-mount standard recovery rectifiers designed specifically for cost-sensitive, high-volume AC/DC conversion in consumer and industrial power supplies where reliability, thermal performance, and SMT compatibility are essential.

FAQ

What is the maximum junction temperature rating for the S4B V6G?

The S4B V6G has a maximum junction temperature (T_J) rating of +150°C, with operational capability from -55°C to +150°C. This enables use in thermally demanding environments such as enclosed LED drivers or industrial power supplies. Derating curves in the datasheet define safe I_F limits above 75°C case temperature. The S4B V6G must be mounted on adequate copper area to maintain T_J ≤ 150°C under full load.

Is the S4B V6G suitable for automated SMT assembly?

Yes, the S4B V6G is explicitly designed for automated placement, with DO-214AB (SMC) package geometry and matte tin-plated leads compliant with J-STD-002 solderability standards. Its J-STD-020 Level 1 moisture sensitivity rating means it can be stored and processed without dry-pack requirements. The S4B V6G supports high-yield reflow profiles typical for industrial SMT lines.

What is the reverse recovery time (t_rr) of the S4B V6G and how does it affect circuit performance?

The S4B V6G has a typical reverse recovery time (t_rr) of 1500 ns under IF = 0.5A, IR = 1.0A, Irr = 0.25A test conditions. This standard recovery speed is appropriate for SMPS operating below 100 kHz. At higher frequencies, increased switching loss and EMI may occur. The S4B V6G is not recommended for PFC or resonant topologies requiring <500 ns t_rr.

Does the S4B V6G meet RoHS and halogen-free requirements?

Yes, the S4B V6G is RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor confirms this in the official datasheet revision K2102. These compliance attributes make the S4B V6G suitable for export to EU, China, and other regulated markets. Full material declarations and test reports are available upon request for the S4B V6G.

How is polarity indicated on the S4B V6G package?

Polarity on the S4B V6G is indicated by a single cathode band printed on the body - the banded end is the cathode terminal, and the opposite end is the anode. This marking aligns with industry-standard DO-214AB orientation and ensures correct placement during PCB assembly. The S4B V6G's polarity marking is laser-etched and remains legible after reflow soldering and cleaning processes.