Taiwan Semiconductor Corporation SSL33 R7G

Overview

SSL33 R7G from Taiwan Semiconductor is a 3A, 30V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching power supplies with low forward voltage (VF ≤ 0.41 V at 3 A), 100 A surge capability, and junction temperature up to 125°C. It serves as the primary output rectifier in AC/DC adapters and DC/DC converters.

For engineers reviewing the SSL33 R7G datasheet, SSL33 R7G pinout, SSL33 R7G application, or SSL33 R7G equivalent, key selection criteria include repetitive peak reverse voltage (30 V), thermal resistance (R_θJL = 13 °C/W), moisture sensitivity level (MSL 1), RoHS/halogen-free compliance, and cathode-band polarity marking - all critical for high-reliability, automated SMT deployment.

Technical Context

This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its low VF and high IFSM support high-frequency, high-efficiency operation in compact power stages.

Thermal performance is characterized on a 16 mm × 16 mm copper pad PCB: R_θJA = 53 °C/W and R_θJC = 15 °C/W confirm suitability for thermally constrained layouts. Reverse leakage remains ≤200 μA at 25°C and ≤50 mA at 100°C under rated VR.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, molded plastic case meeting UL 94V-0; polarity indicated by cathode band; weight ≈ 0.210 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-3EY30-M3/57T and SB330, SSL33 R7G delivers superior thermal resistance (13 °C/W vs. ≥60 °C/W), tighter VF control (≤0.41 V), and higher surge rating (100 A), making it optimal for thermally dense, high-reliability 30 V rectification tasks.

Availability

SSL33 R7G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial DC/DC converters requiring stable component supply, full traceability, and long-lifecycle support.

Supply support for SSL33 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power management and automotive electronics markets since 1979.

The SSL3x series was designed specifically for high-efficiency, cost-sensitive switching power supplies - emphasizing low VF, high surge robustness, and MSL Level 1 manufacturability for high-volume SMT production.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the SSL33 R7G?

The SSL33 R7G has a V_RRM of 30 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version K2310). This rating defines its safe reverse-bias operating limit in circuits such as flyback secondary rectification and ensures compatibility with 24 V nominal output rails where transient clamping margins are critical. Exceeding 30 V risks avalanche breakdown and irreversible damage to the SSL33 R7G.

Does the SSL33 R7G have halogen-free and RoHS-compliant construction?

Yes, the SSL33 R7G is explicitly stated as halogen-free and RoHS compliant in the FEATURES section of the Taiwan Semiconductor datasheet (Version K2310). This compliance meets IPC-1752A material declaration standards and supports environmentally regulated manufacturing, including WEEE and REACH requirements. The SSL33 R7G's molding compound and matte tin plating satisfy both directives without requiring special handling or exemptions.

What is the forward voltage (V_F) specification for the SSL33 R7G at rated current?

The SSL33 R7G has a maximum forward voltage of 0.41 V at I_F = 3 A and T_J = 25°C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating effects. At elevated temperatures (e.g., 100°C), V_F decreases slightly, improving conduction efficiency in thermally stressed applications - a key advantage of the SSL33 R7G over silicon diodes.

Is the SSL33 R7G suitable for automated SMT assembly?

Yes, the SSL33 R7G is optimized for automated placement, as noted in its FEATURES list. Its DO-214AB (SMC) package, matte tin-plated leads (solderable per J-STD-002), and MSL Level 1 rating allow direct use in standard reflow processes without dry-packaging or floor-life controls. The SSL33 R7G's consistent marking (SL33) and cathode band also support reliable vision-based alignment in high-speed pick-and-place systems.

What is the junction-to-lead thermal resistance (R_θJL) of the SSL33 R7G?

The SSL33 R7G has a typical R_θJL of 13 °C/W, measured with the device mounted on a 16 mm × 16 mm copper pad PCB, as specified in the Thermal Performance section. This low value enables efficient heat transfer from the die directly into the PCB copper, reducing reliance on heatsinks. For thermal design, this R_θJL value must be used in conjunction with the SSL33 R7G's power dissipation to calculate actual junction temperature under load.