Taiwan Semiconductor Corporation S3BB R5G

Overview

S3BB R5G from Taiwan Semiconductor is a 3A, 100V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, low forward voltage drop (max 1.15V at 3A), high surge capability (80A IFSM), and RoHS/halogen-free compliance. It serves as the primary AC-to-DC conversion element in compact off-line SMPS and LED driver front-end stages.

For engineers reviewing the S3BB R5G datasheet, S3BB R5G pinout, S3BB R5G application, or S3BB R5G equivalent, key selection criteria include its 100V VRRM rating, 1500ns reverse recovery time, moisture sensitivity level 1 handling, and compatibility with automated SMT placement on SMB footprint layouts.

Technical Context

This single-die standard rectifier operates with a maximum junction temperature of 150°C and exhibits a typical junction-to-lead thermal resistance of 10°C/W. Its electrical behavior is defined by a max 1.15V forward voltage at 3A/25°C and reverse leakage of ≤10µA at 25°C (≤250µA at 125°C).

The device uses a planar passivated structure with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band; case material meets UL 94V-0 flammability rating.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration. Cathode identified by molded band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06S and MUR320, the S3BB R5G offers optimal balance of 100V rating, SMB footprint compatibility, and cost-effective standard recovery performance for mainstream 50–60Hz rectification in space-constrained consumer and industrial power supplies.

Availability

S3BB R5G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB adapter designs requiring stable component supply, JEDEC-compliant packaging, and RoHS/halogen-free compliance.

Supply support for S3BB R5G 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 management and protection markets since 1979.

The S3AB–S3MB series was designed specifically for cost-sensitive, high-volume AC-DC front-end rectification in consumer and industrial power supplies where reliability, manufacturability, and regulatory compliance are essential.

FAQ

What is the maximum junction temperature rating for the S3BB R5G?

The S3BB R5G has a maximum junction temperature (TJ max) of +150°C. This rating defines the upper thermal limit for safe and reliable operation. Engineers must ensure that actual operating junction temperature-calculated using RθJL = 10°C/W, power dissipation, and PCB thermal design-stays below this value across all ambient and load conditions. The S3BB R5G datasheet specifies derating curves confirming usable current capacity down to zero at 150°C ambient.

Does the S3BB R5G meet RoHS and halogen-free requirements?

Yes, the S3BB R5G is RoHS compliant and halogen-free per IEC 61249-2-21. These certifications are explicitly stated in the official Taiwan Semiconductor documentation for the S3AB–S3MB family. The S3BB R5G uses lead-free matte tin plating and halogen-free epoxy molding compound, making it suitable for export to EU, Japan, and other regulated markets requiring strict environmental compliance.

What is the reverse recovery time (trr) specification for the S3BB R5G?

The S3BB R5G has a reverse recovery time (trr) of 1500 ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A. This value reflects its standard recovery behavior-not optimized for high-frequency switching. For designs operating above 20kHz, engineers should verify EMI and efficiency impact; the S3BB R5G is best suited for 50/60Hz line-frequency rectification or low-frequency flyback auxiliary rails where trr is less critical than VF and cost.

Is the S3BB R5G suitable for automated SMT assembly?

Yes, the S3BB R5G is explicitly designed for automated placement. Its DO-214AA (SMB) package, matte tin-plated leads, and moisture sensitivity level 1 classification eliminate pre-bake requirements and ensure compatibility with standard reflow profiles. The S3BB R5G's marking code "S3BB" and cathode band are machine-readable, supporting high-yield pick-and-place and AOI inspection in volume manufacturing.

What does the "R5G" suffix indicate in S3BB R5G?

The "R5G" suffix in S3BB R5G denotes Taiwan Semiconductor's internal reel packaging and environmental coding: "R5" indicates 3,000-piece tape-and-reel packaging per the S3xB ordering convention, and "G" signifies green (halogen-free) compound. This suffix does not affect electrical or thermal specifications-the core device remains identical to S3BB in the S3AB–S3MB family, with 100V VRRM, 3A IF, and DO-214AA (SMB) package.