Taiwan Semiconductor Corporation S5B

Overview

S5B from Taiwan Semiconductor is a 5A, 100V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, low forward voltage drop (max 1.15V at 5A), and high surge capability (100A IFSM). It serves as a primary AC/DC conversion device in compact power supplies for consumer adapters and LED drivers.

For engineers reviewing the S5B datasheet, S5B pinout, S5B application, or S5B equivalent, key selection criteria include its 100V VRRM rating, 13°C/W junction-to-lead thermal resistance, 1500ns reverse recovery time, and compatibility with automated SMT placement per J-STD-020 Level 1 moisture sensitivity.

Technical Context

The S5B operates as a single-die, unidirectional silicon rectifier optimized for high-efficiency switching-mode power conversion. Its glass-passivated junction ensures stable reverse leakage (<10µA at 25°C) and robust surge tolerance under repetitive 8.3ms half-sine stress.

Thermally, the DO-214AB (SMC) package delivers 13°C/W R_θJL and 47°C/W R_θJA, enabling reliable 5A continuous conduction at ≤125°C junction temperature. The 1500ns trr supports operation in 50–100kHz SMPS topologies without excessive switching loss.

Key Specifications

Pinout & Package

DO-214AB (SMC) package: molded epoxy case meeting UL 94V-0, matte tin-plated leads compliant with J-STD-002 solderability, cathode indicated by band, weight ≈0.210g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR5100CT and VS-5EWH06-M3, the S5B offers the lowest VF among DO-214AB 100V rectifiers and optimal thermal resistance for board-level heat dissipation-making it ideal for space-constrained, thermally sensitive 5A adapter designs where 1500ns trr is sufficient.

Availability

S5B is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and AC-DC adapters requiring stable component supply and RoHS-compliant sourcing.

Supply support for S5B 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with ISO/TS 16949-certified production.

The S5A–S5M series was developed specifically for cost-sensitive, high-volume AC/DC front-end rectification in consumer and industrial power supplies, balancing surge robustness, thermal performance, and SMT manufacturability.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) rating for the S5B?

The S5B has a VRRM rating of 100 V, meaning it can reliably block up to 100 volts of reverse voltage in repetitive applications. This value is confirmed in the Absolute Maximum Ratings table of the Taiwan Semiconductor S5A–S5M datasheet (Version F2102), where S5B is explicitly listed under the 100V column. Exceeding this voltage risks avalanche breakdown and permanent damage to the S5B.

Does the S5B have a specified reverse recovery time (trr), and what is its value?

Yes, the S5B has a specified reverse recovery time of 1500 ns under test conditions of IF = 0.5A, IR = 1.0A, and Irr = 0.25A. This parameter is documented in the Electrical Specifications section of the official datasheet. The 1500ns trr indicates moderate-speed recovery, making the S5B appropriate for 50–100kHz SMPS but not ultra-high-frequency resonant topologies. Designers should verify timing margins in their specific circuit using the S5B.

Is the S5B compliant with RoHS and halogen-free standards?

Yes, the S5B is RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the Features section of the Taiwan Semiconductor S5A–S5M datasheet. This compliance applies to the entire S5A–S5M family, including the S5B, and is verified through material declarations and process controls. These certifications make the S5B suitable for export to EU, China, and other regulated markets requiring environmental conformity.

What is the thermal resistance from junction to ambient (R_θJA) for the S5B in its DO-214AB package?

The S5B has a junction-to-ambient thermal resistance (R_θJA) of 47°C/W, as published in the Thermal Performance section of the datasheet. This value assumes standard JEDEC test conditions (single-layer 1-in² copper pad). In practice, PCB layout improvements-such as adding internal ground planes or thermal vias-can reduce effective R_θJA. For accurate thermal design, always reference the S5B's 13°C/W R_θJL when calculating heatsink requirements.

Can the S5B be used as a direct replacement for the S5A or S5D in an existing design?

No-the S5B is not a direct replacement for S5A (50V) or S5D (200V) due to differing VRRM ratings. While all share identical DO-214AB packaging, pinout, and thermal specs, substituting S5B for S5A risks overvoltage failure in 50V-rated circuits, and using it in place of S5D may compromise reverse-blocking margin in 200V applications. Always validate voltage derating and transient immunity when changing between S5x variants. The S5B is only functionally interchangeable with other 100V-rated rectifiers like the S5B itself.