Taiwan Semiconductor Corporation S2DFS M3G

Overview

S2DFS M3G from Taiwan Semiconductor is a 2 A, 200 V standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, 50 A surge rating (8.3 ms), and 150 °C max junction temperature. It delivers low forward voltage (0.98 V at 2 A, 25 °C) and ultra-low reverse leakage (1 µA at 25 °C), suited for DC-DC converter output rectification.

For engineers reviewing the S2DFS M3G datasheet, S2DFS M3G pinout, S2DFS M3G application, or S2DFS M3G equivalent, key selection criteria include repetitive peak reverse voltage (200 V), thermal resistance (R_θJL = 14 °C/W), moisture sensitivity level (MSL 1), RoHS/halogen-free compliance, and SOD-128 footprint compatibility with automated placement.

Technical Context

The S2DFS M3G is a single-die, unidirectional standard recovery rectifier optimized for medium-current switching power supplies. Its glass-passivated junction ensures stable performance under thermal cycling and humidity exposure, while the SOD-128 package enables high power density with low thermal resistance to lead (14 °C/W).

Electrical behavior is defined by a typical forward voltage of 0.98 V at 2 A/25 °C and reverse leakage limited to 1 µA at rated 200 V and 25 °C. Junction capacitance is 12 pF at 4 V reverse bias, supporting moderate-frequency operation without excessive switching loss.

Key Specifications

Pinout & Package

Package: SOD-128 - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, cathode indicated by band, MSL Level 1, weight ≈ 0.027 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS2H100S and ES2D, the S2DFS M3G uniquely balances 200 V blocking, 2 A average current, MSL 1 manufacturability, and 14 °C/W junction-to-lead thermal resistance-making it optimal for space- and thermal-limited industrial DC-DC outputs where Schottky leakage or SMA thermal limits are unacceptable.

Availability

S2DFS M3G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching mode inverter auxiliary supplies, and industrial power adapter front-end designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for S2DFS M3G 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 industrial, computing, and consumer markets since 1979.

The S2DFS M3G belongs to TSC's S2xFS family of standard rectifiers designed specifically for cost-sensitive, high-reliability power conversion applications demanding robust thermal performance and automated assembly compatibility.

FAQ

What is the maximum junction temperature rating for the S2DFS M3G?

The S2DFS M3G has a maximum junction temperature (T_J) rating of +150 °C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet Version B2103. This allows reliable operation in enclosed industrial enclosures or near heat-generating components without derating at ambient temperatures up to 85 °C when mounted on a 5 mm × 5 mm Cu pad. The S2DFS M3G's thermal design supports sustained 2 A conduction under these conditions.

Is the S2DFS M3G RoHS and halogen-free compliant?

Yes, the S2DFS M3G is fully RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the "Features" section of the Taiwan Semiconductor datasheet. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002. These specifications make the S2DFS M3G suitable for export to EU, Japan, and other regulated markets requiring strict material declarations.

What does the "M3G" suffix indicate in S2DFS M3G?

The "M3G" suffix in S2DFS M3G denotes Taiwan Semiconductor's internal date code and factory marking: "M" indicates manufacturing year 2023, "3" is the calendar week, and "G" identifies the fabrication site. This matches TSC's standard marking convention shown in the "Marking Diagram" section of the S2DFS–S2MFS datasheet (Version B2103). The core electrical and mechanical specs remain identical to base S2DFS.

Can the S2DFS M3G replace an SMA-packaged rectifier like ES2D?

The S2DFS M3G can functionally replace ES2D in 200 V, 2 A applications but requires PCB pad revision due to SOD-128 vs. SMA footprint differences. While both share identical V_RRM and I_F, the S2DFS M3G offers superior thermal performance (R_θJA = 74 °C/W vs. ~95 °C/W for ES2D) and MSL Level 1 versus ES2D's MSL Level 2a. The S2DFS M3G is not a drop-in replacement but a performance upgrade with layout adaptation.

What is the forward voltage of the S2DFS M3G at 2 A and 125 °C?

Per the Electrical Specifications table in the Taiwan Semiconductor datasheet (Version B2103), the S2DFS M3G exhibits a maximum forward voltage (V_F) of 0.98 V at 2 A and 125 °C. The typical value is 0.88 V under those conditions. This reduced V_F at elevated temperature improves conduction efficiency in thermally stressed environments, such as inside sealed power supplies or near MOSFETs in inverters-confirming the S2DFS M3G's suitability for high-temperature operation.