Taiwan Semiconductor Corporation S2D-T

Overview

S2D-T from Taiwan Semiconductor is a 2 A, 200 V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 50 A surge capability (8.3 ms). It operates from –55°C to +150°C and is used in DC–DC converters and switching-mode inverters.

For engineers reviewing the S2D-T datasheet, S2D-T pinout, S2D-T application, or S2D-T equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward voltage (0.95 V max at 2 A/25°C), thermal resistance (R_θJA = 78 °C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance.

Technical Context

The S2D-T is a single-die, unidirectional standard recovery rectifier optimized for general-purpose AC/DC and DC/DC conversion. Its glass-passivated junction ensures stable reverse characteristics and low IR across temperature (≤300 µA at 125°C).

Thermal performance is characterized with R_θJL = 20 °C/W and R_θJC = 26 °C/W on a 10 mm × 10 mm Cu pad PCB. Junction capacitance is 11 pF at 1 MHz and 4 V reverse bias, supporting moderate-frequency switching applications up to ~100 kHz.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, cathode indicated by band. Matte tin-plated leads, J-STD-002 solderable, MSL Level 1, UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R02DJF and SB220-E3/52, the S2D-T offers optimal balance of cost, thermal robustness (R_θJA = 78 °C/W), and leakage performance (≤5 µA at 25°C) in standard SMB layouts-making it ideal for cost-sensitive, thermally constrained, and leakage-sensitive industrial power supplies.

Availability

S2D-T is available at Aetrix Electronics and suitable for DC–DC converters, switching-mode inverters, and general-purpose power rectification requiring stable component supply, long-lifecycle availability, and consistent MSL Level 1 handling.

Supply support for S2D-T 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 power rectifiers, TVS diodes, MOSFETs, and LED drivers.

The S2D-T belongs to TSC's S2x-T family of standard surface-mount rectifiers, designed specifically for reliable, cost-effective AC/DC and DC/DC power conversion in industrial, computing, and consumer power supplies.

FAQ

What is the maximum junction temperature rating for the S2D-T?

The S2D-T has a maximum junction temperature (T_J) of +150°C, with a minimum of –55°C. This rating is validated under absolute maximum conditions per the datasheet and allows operation in demanding industrial environments where ambient temperatures exceed 85°C, provided thermal design accounts for R_θJA = 78 °C/W on a standard 10 mm × 10 mm Cu pad. The S2D-T maintains stable electrical parameters-including reverse leakage and forward voltage-across this full range.

Is the S2D-T RoHS and halogen-free compliant?

Yes, the S2D-T is fully RoHS compliant and halogen-free per IEC 61249-2-21. This compliance is confirmed in the official Taiwan Semiconductor datasheet (Version C2102) and verified through material declarations. The S2D-T uses matte tin-plated leads and UL 94V-0 molding compound, making it suitable for environmentally regulated end equipment including industrial automation and consumer electronics sold in the EU and other restricted markets.

What does the "-T" suffix indicate in S2D-T?

The "-T" suffix in S2D-T denotes tape-and-reel packaging: 3,000 units per reel in DO-214AA (SMB) format. This is the standard shipping configuration for automated SMT placement. The "S2D" portion identifies the 200 V variant within the S2x-T family; other variants (e.g., S2G-T = 400 V, S2M-T = 1000 V) share identical package, thermal specs, and mechanical construction but differ only in V_RRM and marking code.

Can the S2D-T replace a Schottky diode like SB220 in existing designs?

The S2D-T can serve as a functional alternative to SB220 in low-frequency (<100 kHz), temperature-stable applications where low reverse leakage (≤5 µA at 25°C) is prioritized over ultra-low forward voltage. However, the S2D-T has higher V_F (0.95 V vs. 0.52 V) and slower recovery, so it is not recommended for high-efficiency or high-frequency designs relying on Schottky advantages. Always verify thermal and leakage margins before substituting S2D-T for SB220.

What is the moisture sensitivity level (MSL) of the S2D-T and how does it affect assembly?

The S2D-T is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be placed directly into reflow without pre-baking. This eliminates moisture-related popcorning risk and simplifies high-volume SMT manufacturing. The MSL Level 1 rating is achieved via hermetic glass passivation and UL 94V-0 molding compound-key attributes confirmed in the S2D-T datasheet and critical for reliable automated assembly in automotive and industrial production lines.