Taiwan Semiconductor Corporation SS310L

Overview

SS310L from Taiwan Semiconductor is a 3A, 100V Schottky barrier surface-mount rectifier in Sub SMA package, featuring 0.85V forward voltage at 3A/25°C, 80A peak surge current, and 100µA reverse leakage at rated VR and 25°C. It serves as a high-efficiency output rectifier in DC-DC converters and offline SMPS secondary-side circuits.

For engineers reviewing the SS310L datasheet, SS310L pinout, SS310L application, or SS310L equivalent, key selection considerations include its 100V V_RRM, thermal resistance (R_θJA = 60°C/W), cathode-band polarity marking, moisture sensitivity level 1 rating, and Sub SMA mechanical compatibility with automated SMT placement.

Technical Context

The SS310L employs a single-die Schottky junction optimized for low forward voltage and fast switching in high-frequency power conversion. Its 100V repetitive peak reverse voltage and 70V RMS reverse rating support universal-input offline adapter designs requiring robust reverse blocking.

Thermal performance is defined by R_θJC = 30°C/W and R_θJA = 60°C/W, enabling 3A continuous operation up to 125°C junction temperature (derated above 75°C case temperature). Reverse leakage remains ≤5mA at 125°C, supporting stable operation in thermally constrained environments.

Key Specifications

Pinout & Package

Package: Sub SMA - Surface-mount plastic package with matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity indicator. Weight: 0.019 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-3EYH01-M3/54 and SB3100, the SS310L delivers the best balance of low leakage (100µA), proven 125°C continuous operation, and industry-standard Sub SMA compatibility-making it optimal for energy-critical, thermally constrained, and high-reliability power supply designs.

Availability

SS310L is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and industrial DC-DC converters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SS310L 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 devices, and MOSFETs since 1979.

The SS310L belongs to TSC's SS3xL Schottky rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC power conversion in cost-sensitive, high-volume consumer and industrial applications.

FAQ

What is the maximum junction temperature rating for the SS310L?

The SS310L has a maximum junction temperature (T_J) rating of 125°C for continuous operation, with an extended storage temperature range up to +150°C. This rating is validated per the absolute maximum ratings table in the official C2103 datasheet revision and supports reliable operation in industrial ambient conditions when mounted on standard 1-oz FR-4 PCBs with adequate copper area. The SS310L must not exceed 125°C junction temperature during steady-state conduction to maintain specified electrical parameters and lifetime reliability.

Does the SS310L have a guard ring, and what function does it serve?

Yes, the SS310L incorporates a guard ring structure as confirmed in the "Features" section of the C2103 datasheet. This guard ring enhances edge termination robustness, suppresses premature avalanche breakdown under high dv/dt stress, and improves long-term reliability during repetitive overvoltage events such as line surges or inductive kickback. It directly contributes to the device's 10,000 V/µs critical rate of rise of off-state voltage rating.

What is the reverse leakage current of the SS310L at elevated temperature?

The SS310L exhibits ≤5 mA reverse leakage current (I_R) at its rated 100V reverse voltage and 125°C junction temperature, as specified in the Electrical Specifications table of the C2103 datasheet. At 25°C and 100V, leakage is limited to 100 µA. This low high-temperature leakage ensures stable regulation and minimal standby power loss in thermally demanding applications like enclosed LED drivers or sealed industrial power modules.

Is the SS310L compatible with lead-free reflow soldering processes?

Yes, the SS310L 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 rated at Level 1 per J-STD-020-meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking. The UL 94V-0 molding compound also withstands peak reflow temperatures up to 260°C for 10 seconds, satisfying IPC/JEDEC J-STD-020D.3 standards.

How does the SS310L differ from the SS36L in terms of forward voltage and reverse leakage?

The SS310L has a higher forward voltage (0.85 V vs. 0.75 V at 3A/25°C) and lower reverse leakage (100 µA vs. 500 µA at 100V/25°C) compared to the SS36L. These trade-offs reflect the higher 100V V_RRM design: increased barrier height reduces leakage but raises V_F. Both share identical Sub SMA packaging, 3A current rating, and thermal resistance values, making them drop-in replacements only when voltage and leakage requirements align with the target application.