Taiwan Semiconductor Corporation S5A

Overview

S5A from Taiwan Semiconductor is a 5 A, 50 V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring 100 A peak surge current capability, 1.15 V max forward voltage at 5 A, and 10 µA max reverse leakage at 25°C - deployed in AC/DC front-end rectification stages of compact switching power supplies.

For engineers reviewing the S5A datasheet, S5A pinout, S5A application, or S5A equivalent, key selection criteria include repetitive peak reverse voltage (50 V), 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.

Technical Context

The S5A is a single-die, glass-passivated, standard recovery rectifier optimized for cost-sensitive, high-volume AC/DC conversion where moderate switching speed (1500 ns trr) and robust surge handling are prioritized over ultra-fast recovery. It operates across –55°C to +150°C junction temperature range and uses a unidirectional, cathode-banded polarity configuration.

Thermally, it delivers 13 °C/W junction-to-lead resistance and 47 °C/W junction-to-ambient resistance under standard mounting conditions. Its DO-214AB (SMC) package supports 3,000-unit tape-and-reel packaging and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicating band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; weight ≈0.210 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR550 and VS-5EWH05FN-M3, the S5A offers the lowest VF and highest surge rating in its voltage class, making it ideal for high-reliability, thermally constrained, and cost-sensitive AC/DC front ends where standard recovery speed is acceptable.

Availability

S5A is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and AC/DC adapters requiring stable component supply, long-term lifecycle support, and J-STD-020 Level 1 moisture handling.

Supply support for S5A 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 rectifiers, TVS diodes, MOSFETs, and bipolar transistors since 1979.

The S5A belongs to TSC's S5x series of surface-mount general-purpose rectifiers, designed specifically for high-volume, cost-optimized AC/DC conversion in consumer, industrial, and lighting applications where reliability, manufacturability, and regulatory compliance are critical.

FAQ

What is the maximum junction temperature rating for the S5A?

The S5A has a maximum junction temperature (TJ MAX) of +150°C, allowing operation in thermally demanding environments such as enclosed LED drivers or industrial power supplies. This rating is validated per absolute maximum ratings table in TSC's F2102 datasheet revision and applies under specified thermal conditions with appropriate PCB copper area. The S5A must not exceed this limit during steady-state or transient operation to ensure long-term reliability.

Does the S5A have a halogen-free and RoHS-compliant construction?

Yes, the S5A is both RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official TSC product documentation (Version F2102). Its molding compound, lead finish, and internal materials meet these environmental standards, supporting global market access and end-product compliance with WEEE and REACH directives. This applies to all units marked "S5A" in DO-214AB packaging.

What is the reverse recovery time (trr) specification for the S5A?

The S5A has a reverse recovery time (trr) of 1500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per TSC's F2102 datasheet. This standard recovery characteristic makes the S5A suitable for line-frequency and low-switching-frequency applications like basic SMPS and adapters, but not for high-frequency resonant topologies where faster trr is required.

Can the S5A be used in place of the S5B or S5D in a design?

No - the S5A is rated for 50 V VRRM, whereas the S5B and S5D are rated for 100 V and 200 V respectively. Substituting S5A in a circuit designed for higher reverse voltage risks catastrophic breakdown under normal operating conditions. Each S5x variant is electrically distinct; voltage rating must match system requirements exactly. Always verify VRRM against worst-case reverse stress in your schematic.

What packaging format is available for the S5A?

The S5A is supplied in 3,000-unit tape-and-reel format per DO-214AB (SMC) package outline, as specified in TSC's ordering information (F2102). This packaging supports high-speed automated placement and complies with EIA-481 standards. No tray or bulk options are listed for S5A in official documentation; all standard orders ship in tape-and-reel unless custom arrangements are negotiated.