Taiwan Semiconductor Corporation SSL33

Overview

SSL33 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, 25°C) and high surge capability (IFSM = 100 A). It serves as the primary output rectifier in AC/DC adapters and DC/DC converters.

For engineers reviewing the SSL33 datasheet, SSL33 pinout, SSL33 application, or SSL33 equivalent, key selection criteria include its 30 V repetitive peak reverse voltage (VRRM), 100 A surge rating, 13 °C/W junction-to-lead thermal resistance, moisture sensitivity level 1 compliance, and RoHS/halogen-free qualification - all critical for high-reliability, automated SMT production.

Technical Context

The SSL33 employs a single-die Schottky structure with guard ring overvoltage protection, enabling stable operation up to 125°C junction temperature. Its low VF and high IFSM support high-frequency switching topologies while minimizing conduction loss and thermal stress.

Thermal performance is validated on a 16 mm × 16 mm Cu pad PCB per JEDEC standards: RθJL = 13 °C/W and RθJA = 53 °C/W. Reverse leakage is tightly specified - IR ≤ 200 μA at 25°C and ≤ 50 mA at 100°C - ensuring low standby power in energy-sensitive applications.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. 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, the SSL33 delivers superior thermal performance (13 °C/W RθJL) and lowest VF (≤0.41 V), enabling higher power density and lower system-level BOM cost in thermally constrained SMT designs.

Availability

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

Supply support for SSL33 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 electronics markets since 1979.

The SSL3x series targets high-volume, cost-sensitive power conversion applications - emphasizing robustness, automated manufacturability, and compliance with global environmental standards across consumer, industrial, and lighting segments.

FAQ

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

The SSL33 has a VRRM of 30 V, verified per the official Taiwan Semiconductor K2310 datasheet. This rating defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown. It is strictly limited to 30 V - not interchangeable with SSL32 (20 V) or SSL34 (40 V) in designs requiring precise voltage margining. The SSL33 must not be substituted in circuits exceeding 30 V reverse bias.

Does the SSL33 require baking before reflow soldering?

No, the SSL33 does not require baking prior to reflow. Its moisture sensitivity level (MSL) is rated Level 1 per J-STD-020, meaning it is exempt from floor-life limitations and dry-pack requirements. This allows direct placement from tape-and-reel packaging into standard SMT reflow ovens without preconditioning - a key advantage for high-throughput adapter manufacturing where the SSL33 is commonly deployed.

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

The SSL33 has a maximum forward voltage of 0.41 V at IF = 3 A and TJ = 25°C, as confirmed in the Electrical Specifications table of the K2310 datasheet. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At elevated temperatures (e.g., 100°C), VF decreases slightly, but system design should reference the 0.41 V max for worst-case conduction loss calculation in the SSL33.

Is the SSL33 RoHS and halogen-free compliant?

Yes, the SSL33 is both RoHS compliant and halogen-free, as explicitly stated in the FEATURES section of the K2310 datasheet. These qualifications are verified through material declarations and testing per IEC 62321 and JEDEC J-STD-709. This makes the SSL33 suitable for export to EU, China, South Korea, and other regulated markets where substance restrictions apply - a critical factor for global adapter and lighting OEMs using the SSL33.

What is the marking code printed on the SSL33 device body?

The SSL33 is marked with "SL33" on its molded plastic body, per the Absolute Maximum Ratings table in the K2310 datasheet. This 4-character laser marking - located adjacent to the cathode band - enables automated optical inspection (AOI) and traceability in SMT lines. It distinguishes the SSL33 from SSL32 (marked "SL32") and SSL34 (marked "SL34"), preventing misplacement during high-speed pick-and-place operations.