Taiwan Semiconductor Corporation S4A V6G

Overview

S4A V6G from Taiwan Semiconductor is a 4A, 50V 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, and 10µA max reverse leakage at 25°C - used in AC/DC front-end rectification for compact switching power supplies.

For engineers reviewing the S4A V6G datasheet, S4A V6G pinout, S4A V6G application, or S4A V6G equivalent, key selection criteria include repetitive peak reverse voltage (50V), thermal resistance (R_θJL = 13°C/W), moisture sensitivity level (MSL 1), RoHS/halogen-free compliance, and tape-and-reel packaging for automated assembly.

Technical Context

The S4A V6G is a single-die, standard recovery rectifier with unidirectional conduction and cathode-band polarity marking. Its 1500ns reverse recovery time (trr) and 60pF junction capacitance reflect trade-offs between switching speed and low conduction loss.

Designed for continuous forward current up to 4A at 150°C junction temperature, it relies on lead-to-board thermal conduction (R_θJL = 13°C/W) rather than ambient dissipation (R_θJA = 47°C/W), making PCB copper area critical for thermal management in high-density SMPS layouts.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band, MSL Level 1, weight ≈0.210g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH4L06S and MBR450-E3/45, the S4A V6G offers optimal balance of cost, 50V blocking, and 150°C junction capability in DO-214AB - ideal for thermally constrained, mains-fed 4A rectifiers where ultra-fast recovery is unnecessary.

Availability

S4A V6G is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, LED lighting drivers, and DC-DC converter input stages requiring stable component supply and full MSL Level 1 handling.

Supply support for S4A 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, serving global power, automotive, and industrial markets since 1979.

The S4A V6G belongs to TSC's S4x series of general-purpose surface-mount rectifiers, engineered for cost-effective, high-reliability AC/DC conversion in space-constrained consumer and industrial power supplies.

FAQ

What is the maximum junction temperature rating for the S4A V6G?

The S4A V6G has a maximum junction temperature (T_J) of +150°C, enabling operation in high-ambient environments such as enclosed LED drivers or industrial SMPS. This rating is validated per absolute maximum ratings in the official TSC datasheet Version K2102 and must be maintained using appropriate PCB copper area to achieve the specified R_θJL = 13°C/W thermal path. Exceeding 150°C risks permanent parametric shift or failure of the S4A V6G.

Does the S4A V6G have a halogen-free construction?

Yes, the S4A V6G is halogen-free in accordance with IEC 61249-2-21 and RoHS compliant, as confirmed in the "Features" section of the TSC S4A–S4M datasheet (Version K2102). The molding compound contains no brominated or chlorinated flame retardants, and the matte tin-plated leads meet J-STD-002 solderability standards. This makes the S4A V6G suitable for environmentally regulated end equipment including EU medical and industrial devices.

What does the "V6G" suffix indicate in S4A V6G?

The "V6G" suffix in S4A V6G denotes Taiwan Semiconductor's internal manufacturing code: "V" indicates wafer fab location, "6" is the year code (2026), and "G" is the assembly/test site identifier. It does not affect electrical specifications - all S4A devices share identical V_RRM = 50V, I_F = 4A, and thermal parameters regardless of suffix. The base part remains S4A, and the S4A V6G functions identically to other S4A date-coded variants.

Can the S4A V6G replace a 1N5408 in through-hole designs?

No - the S4A V6G is a surface-mount DO-214AB (SMC) device and is not a direct physical or electrical replacement for the through-hole 1N5408 (DO-201AD). While both are 3A/1000V rectifiers, the S4A V6G is rated for only 50V V_RRM and 4A I_F, and its footprint, thermal path, and reflow profile differ fundamentally. Substituting the S4A V6G for a 1N5408 would require PCB redesign, layout validation, and thermal reassessment - the S4A V6G is intended for new SMT-based 50V rectifier applications, not legacy through-hole retrofits.

Is the S4A V6G suitable for use in automotive applications?

The S4A V6G is not qualified to AEC-Q101 and is not recommended for automotive powertrain or safety-critical systems. Although it operates from −55°C to +150°C and meets RoHS/halogen-free requirements, TSC documentation explicitly states these devices "are not designed for use in medical, life-saving, or life-sustaining applications" - a category that includes automotive ADAS and engine control. For automotive-grade alternatives, consult TSC's AEC-Q101-certified rectifier portfolio; the S4A V6G remains appropriate for industrial and consumer power supplies only.