Taiwan Semiconductor Corporation S3D R7G

Overview

S3D R7G from Taiwan Semiconductor is a 200 V, 3 A surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring 100 A surge current capability, 1.15 V max forward voltage at 3 A, and 10 µA max reverse leakage at 25°C - used in AC/DC front-end rectification for compact switching power supplies.

For engineers reviewing the S3D R7G datasheet, S3D R7G pinout, S3D R7G application, or S3D R7G equivalent, key selection criteria include repetitive peak reverse voltage (200 V), thermal resistance (13 °C/W junction-to-lead), reverse recovery time (1500 ns), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance for high-reliability industrial power designs.

Technical Context

This standard recovery rectifier employs a glass-passivated single-die PN junction optimized for cost-sensitive, medium-voltage SMPS input stages. Its 150 °C maximum junction temperature and 47 °C/W junction-to-ambient thermal resistance support conduction-limited operation under continuous 3 A DC load with moderate PCB copper area.

The device exhibits 60 pF junction capacitance at 4 V reverse bias and 1500 ns reverse recovery time under standardized 0.5 A forward / 1.0 A reverse test conditions - characteristics typical of general-purpose rectifiers where fast switching is not required but robust surge handling is critical.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package: molded plastic body, matte tin-plated leads, cathode indicated by band, moisture sensitivity level 1, UL 94V-0 rated compound, weight ≈0.210 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR320 and VS-3EWH02-M3/5AT, the S3D R7G offers lowest cost and simplest SMT integration for 50–100 kHz applications where standard recovery speed is acceptable and board space is constrained.

Availability

S3D R7G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial SMPS requiring stable component supply, J-STD-020 Level 1 manufacturability, and RoHS-compliant rectification.

Supply support for S3D R7G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with ISO/TS 16949 and ISO 14001 certification.

The S3A–S3M series was designed specifically for cost-effective, high-volume AC/DC front-end rectification in consumer and industrial power supplies - balancing surge robustness, thermal performance, and SMT process compatibility.

FAQ

What is the maximum junction temperature rating for the S3D R7G?

The S3D R7G has a maximum junction temperature (T_J) of +150 °C, enabling reliable operation in enclosed power supplies where ambient temperatures may reach 70–85 °C. This rating is validated per JEDEC standards and confirmed in the official Taiwan Semiconductor datasheet revision O2301. Derating curves show usable current drops linearly above 25 °C ambient, with 3 A maintained up to ~95 °C lead temperature. The S3D R7G must be mounted on sufficient copper area to achieve this limit.

Does the S3D R7G have a specified reverse recovery time, and how is it measured?

Yes, the S3D R7G has a reverse recovery time (t_rr) of 1500 ns, measured under standardized conditions: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, per JEDEC Test Method JESD24-14. This value reflects its standard recovery behavior - suitable for 50–100 kHz SMPS but not recommended for high-frequency PFC or resonant topologies. The S3D R7G datasheet includes Fig.6 showing both characteristic waveform and test circuit diagram for verification.

Is the S3D R7G compatible with lead-free reflow soldering processes?

Yes, the S3D R7G is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level is J-STD-020 Level 1 - meaning no baking or dry-pack handling is required before reflow. The DO-214AB (SMC) package withstands peak reflow temperatures up to 260 °C for 10 seconds, as verified in Taiwan Semiconductor's qualification report O2301. The S3D R7G is routinely deployed in Class II and III industrial assemblies.

What does the "R7G" suffix in S3D R7G indicate?

The "R7G" suffix in S3D R7G is Taiwan Semiconductor's internal date and factory code: "R7" denotes week 7 of year 2023 (or 2033), and "G" identifies the fabrication facility. It does not affect electrical specifications - all S3D devices share identical V_RRM = 200 V, I_F = 3 A, and thermal ratings regardless of suffix. The base part number S3D defines the electrical and mechanical identity; the S3D R7G is functionally interchangeable with any other S3D marking (e.g., S3D R5A, S3D R9F) in design-in and procurement.

How does the S3D R7G compare to the S3G variant in terms of voltage rating and use cases?

The S3D R7G is rated for 200 V repetitive peak reverse voltage (V_RRM), while the S3G variant is rated for 400 V V_RRM. Both share identical current (3 A), surge (100 A), thermal (13 °C/W), and package (DO-214AB) specs. The S3D R7G is optimal for 120/230 V AC inputs; the S3G is selected for 277 V AC or higher-input industrial systems. Substituting S3D R7G for S3G in 277 V AC applications risks reverse breakdown - the S3D R7G must only be used where peak line voltage remains below 200 V.