Taiwan Semiconductor Corporation SS13LS

Overview

SS13LS from Taiwan Semiconductor is a 1A, 30V Schottky barrier surface-mount rectifier in SOD-123HE package, optimized for high-efficiency DC/DC conversion with low forward voltage (0.50 V at 1.0 A, 25°C), high surge capability (30 A IFSM), and junction temperature up to +150°C. It serves as a primary output rectifier in compact AC/DC adapters and isolated flyback converters.

For engineers reviewing the SS13LS datasheet, SS13LS pinout, SS13LS application, or SS13LS equivalent, key selection criteria include its 30 V VRRM rating, 0.50 V VF at rated current, 73 pF junction capacitance, moisture sensitivity level 1 compliance, and SOD-123HE footprint compatibility with automated placement systems.

Technical Context

The SS13LS implements a single-die Schottky junction with low series resistance and minimal reverse recovery charge, enabling high-frequency switching operation without minority-carrier storage delay. Its thermal design supports 25°C/W junction-to-case resistance and operates reliably from –55°C to +150°C junction temperature.

Designed for unidirectional power conversion, it features a cathode band polarity indicator, matte tin-plated leads compliant with J-STD-002 solderability, and UL 94V-0 molding compound. The device meets JESD201 Class 2 whisker resistance and IEC 61249-2-21 halogen-free requirements.

Key Specifications

Pinout & Package

Package: SOD-123HE - Surface-mount plastic case with 0.85 mm max profile, 1.95 mm length, 1.25 mm width, and cathode band marking per JEDEC MO-203AA variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB130 and VS-1EQH03-M3/5AT, the SS13LS offers superior thermal capability (+150°C vs. +125°C), marginally lower VF than SB130, and lower reverse leakage than VS-1EQH03-M3/5AT at 25°C-making it optimal for thermally demanding, high-efficiency adapter designs.

Availability

SS13LS is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converters, and USB power delivery systems requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SS13LS 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, and MOSFETs for industrial and consumer markets.

The SS13LS belongs to TSC's SSxLS Schottky rectifier family, engineered specifically for high-frequency, high-efficiency secondary-side rectification in space-constrained power supplies where low VF, low profile, and thermal resilience are critical.

FAQ

What is the maximum junction temperature rating for SS13LS?

The SS13LS has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official TSC datasheet Version D2212. This allows reliable operation in thermally dense applications such as enclosed USB-C PD chargers and industrial DC/DC modules where ambient temperatures exceed 70°C. The SS13LS maintains specified electrical parameters up to this limit when derated per the forward current derating curve.

Does SS13LS have a RoHS and halogen-free certification?

Yes, the SS13LS is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the TSC datasheet. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated to J-STD-002 standards. These certifications are confirmed for the SOD-123HE packaged SS13LS and apply to all units shipped under ordering code SS13LS.

What is the forward voltage of SS13LS at 1.0 A and 25°C?

The forward voltage (V_F) of SS13LS is 0.50 V at 1.0 A and 25°C, as specified in the ELECTRICAL SPECIFICATIONS table under "SS13LS" row and "IF = 1.0A, TJ = 25°C" condition. This value is measured using pulse testing (PW = 0.3 ms) and reflects typical conduction loss under nominal load. The SS13LS achieves this low V_F via optimized Schottky metallization and die geometry.

Is SS13LS suitable for automated SMT assembly?

Yes, SS13LS is explicitly designed for automated placement, as noted in the FEATURES section. Its SOD-123HE package conforms to JEDEC MO-203AA outline, has MSL Level 1 rating (no dry-pack required), and uses matte tin-plated leads qualified per J-STD-002. The 0.85 mm max profile and defined pad layout in the PACKAGE OUTLINE DIMENSIONS drawing ensure compatibility with standard pick-and-place and reflow processes used for SS13LS production.

What is the junction-to-ambient thermal resistance (R_θJA) of SS13LS?

The junction-to-ambient thermal resistance (R_θJA) of SS13LS is 70°C/W, as published in the THERMAL PERFORMANCE table of the official datasheet. This value assumes standard PCB mounting on a 1-in² copper pad with no additional heatsinking. It enables thermal design calculations for SS13LS in real-world layouts, confirming that at 1 A DC load and 0.50 V drop, junction temperature rise remains within limits up to ~80°C ambient.