Taiwan Semiconductor Corporation S5GB

Overview

S5GB from Taiwan Semiconductor is a 5A, 400V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 1.1V max forward voltage at 5A/25°C, 200A non-repetitive surge capability, and J-STD-020 Level 1 moisture sensitivity - used in primary-side rectification of AC/DC adapters and SMPS.

For engineers reviewing the S5GB datasheet, S5GB pinout, S5GB application, or S5GB equivalent, key selection criteria include its 400V repetitive peak reverse voltage, 47°C/W junction-to-ambient thermal resistance, RoHS/halogen-free compliance, and compatibility with automated placement on SMB footprint layouts.

Technical Context

The S5GB operates as a single-die, unidirectional standard recovery rectifier with cathode-band polarity marking. Its 150°C maximum junction temperature and 13°C/W junction-to-lead thermal resistance support sustained conduction under high ambient conditions in compact power supplies.

Electrical behavior is defined by 10μA max reverse leakage at 25°C and 250μA at 125°C, 40pF typical junction capacitance at 1MHz/4V, and forward voltage tightly bounded at ≤1.1V under rated DC current - enabling predictable loss modeling in 50–100kHz switching topologies.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.090g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH5L06 and ES5D, the S5GB delivers optimal balance of 400V reverse rating, SMB package compatibility, and 200A surge robustness for universal-input 5A rectification - making it preferred for global-market adapters and compact SMPS where footprint and reliability are co-prioritized.

Availability

S5GB is available at Aetrix Electronics and suitable for AC/DC adapters, switching mode power supplies, and flat-panel monitor power sections requiring stable component supply across high-volume production cycles.

Supply support for S5GB 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 Taiwanese manufacturer specializing in discrete power semiconductors, including rectifiers, TVS, MOSFETs, and IGBTs for industrial and consumer applications.

The S5GB belongs to TSC's S5x series of standard surface-mount rectifiers designed specifically for cost-effective, high-reliability AC/DC front-end rectification in space-constrained power supplies.

FAQ

What is the maximum junction temperature rating for the S5GB?

The S5GB has a maximum junction temperature (TJ max) of +150°C, allowing continuous operation in thermally demanding environments such as enclosed adapters or densely packed SMPS boards. This rating is validated per JEDEC test conditions and supports reliable long-term performance when thermal design respects the 47°C/W RθJA limit. The S5GB maintains specified electrical parameters up to this temperature, including ≤1.1V forward voltage and ≤250μA reverse leakage at 125°C.

Does the S5GB have a halogen-free construction?

Yes, the S5GB is halogen-free in accordance with IEC 61249-2-21 and RoHS compliant, using molding compound and plating materials that exclude bromine, chlorine, and other regulated halogens. This ensures compliance with environmental directives for consumer electronics sold in the EU, China, and South Korea. The S5GB's halogen-free status is verified in TSC's material declarations and applies to both the die encapsulation and matte tin-plated leads.

What is the surge current rating of the S5GB and how is it tested?

The S5GB is rated for 200A non-repetitive forward surge current (IFSM) under an 8.3ms single half-sine wave at TJ = 25°C, per JEDEC JESD201. This rating reflects real-world cold-start inrush events in AC/DC power supplies. The S5GB also supports 150A at TJ = 125°C, enabling robust operation during warm-up transients. These values are measured with controlled pulse conditions and are not extrapolated - the S5GB's 200A rating is confirmed in TSC's D2102 datasheet revision.

Is the S5GB compatible with automated SMT assembly processes?

Yes, the S5GB is explicitly designed for automated placement, with DO-214AA (SMB) geometry meeting IPC-7351B standards for land pattern and coplanarity. Its J-STD-020 Level 1 moisture sensitivity means it can be placed directly from tape-and-reel without pre-baking. The S5GB's matte tin-plated leads ensure reliable solder wetting per J-STD-002, and its 0.090g mass prevents tombstoning during reflow - all verified in TSC's mechanical and process qualification reports for the S5GB.

What does the "GB" suffix indicate in the S5GB part number?

The "GB" suffix in S5GB identifies the 400V repetitive peak reverse voltage (VRRM) rating within the S5x family - where "JB" = 600V, "KB" = 800V, and "MB" = 1000V. This coding is defined in TSC's ordering information and matches the marking code physically printed on the device body. The S5GB's 400V rating is electrically and mechanically identical to other S5x variants except for VRRM, IFSM, and reverse leakage curves - all other parameters including package, thermal resistance, and forward characteristics remain consistent.