Taiwan Semiconductor Corporation S3BB

Overview

S3BB 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 1.15 V at 3 A), high surge capability (80 A IFSM), and J-STD-020 Level 1 moisture sensitivity - used in AC/DC front-end stages of compact SMPS and LED drivers.

For engineers reviewing the S3BB datasheet, S3BB pinout, S3BB application, or S3BB equivalent, key selection criteria include repetitive peak reverse voltage (100 V), thermal resistance (10 °C/W), reverse recovery time (1500 ns), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The S3BB operates as a single-die, unidirectional standard recovery rectifier with a rated average forward current of 3 A and maximum junction temperature of 150 °C. Its 100 V VRRM rating and 1.15 V VF (at 3 A, 25 °C) support efficient energy transfer in low-to-mid voltage DC bus conditioning.

Thermal performance is defined by a junction-to-lead thermal resistance of 10 °C/W, enabling reliable operation under continuous conduction mode in SMB-mounted PCB layouts. Reverse recovery time of 1500 ns reflects standard recovery behavior suitable for non-critical switching frequencies below 100 kHz.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, molded plastic case with matte tin-plated leads, cathode indicated by band. Weight: 0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06S and SB3100, the S3BB offers optimal balance of cost, thermal resistance (10 °C/W), and standard recovery timing for 50/60 Hz-derived DC bus generation - making it preferred for cost-sensitive, thermally constrained adapter and lighting applications where fast recovery is unnecessary.

Availability

S3BB is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and industrial auxiliary power converters requiring stable component supply and long-term manufacturability.

Supply support for S3BB 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 and protection markets since 1979.

The S3BB belongs to TSC's S3x series of standard surface-mount rectifiers, engineered for high-volume, cost-optimized AC/DC conversion in consumer, industrial, and lighting applications where reliability, RoHS compliance, and J-STD-020 Level 1 process compatibility are essential.

FAQ

What is the maximum junction temperature rating for the S3BB?

The S3BB has a maximum junction temperature (T_J) rating of +150 °C, with a minimum of –55 °C. This wide operating range allows deployment in sealed industrial enclosures and high-ambient lighting fixtures. The 10 °C/W junction-to-lead thermal resistance enables effective heat transfer to the PCB, supporting sustained 3 A conduction when mounted on ≥1 sq-in copper area. Derating begins above 75 °C ambient per the forward current derating curve in the S3BB datasheet.

Is the S3BB RoHS and halogen-free compliant?

Yes, the S3BB is fully RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor confirms this in the official S3BB datasheet (Version M2102), and the device carries appropriate marking and documentation for export to EU, China, and other regulated markets. No brominated flame retardants or chlorine-based compounds are used in the molding compound or plating.

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

The S3BB has a reverse recovery time (t_rr) of 1500 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value reflects its classification as a standard recovery rectifier, optimized for line-frequency and low-to-mid frequency switching applications such as flyback and forward converters operating below 100 kHz. It is not intended for high-frequency synchronous rectification.

Can the S3BB replace the S3AB or S3DB in an existing design?

No - the S3BB cannot directly replace S3AB (50 V) or S3DB (200 V) without circuit review. While all share the same DO-214AA (SMB) package and 3 A rating, their V_RRM values differ: S3AB = 50 V, S3BB = 100 V, S3DB = 200 V. Substituting S3BB for S3AB risks overvoltage failure; substituting for S3DB may compromise transient margin. Always verify reverse voltage stress margins in the target application before interchange.

What packaging and reel quantity is offered for the S3BB?

The S3BB is supplied in DO-214AA (SMB) package on 3,000-piece tape-and-reel format, per the official Taiwan Semiconductor ordering information. The reel complies with EIA-481 standards and is compatible with standard pick-and-place equipment. Lead finish is matte tin, solderable per J-STD-002, and moisture sensitivity level is J-STD-020 Level 1 - no pre-baking required prior to reflow.