Taiwan Semiconductor Corporation SS115L

Overview

SS115L from Taiwan Semiconductor is a 1 A, 150 V Schottky barrier surface-mount rectifier in Sub SMA package, featuring 0.900 V forward voltage at 1.0 A and 25°C, 50 µA reverse current at rated VR and 25°C, and 30 A peak surge capability - used in high-efficiency DC/DC converters and AC/DC adapters.

For engineers reviewing the SS115L datasheet, SS115L pinout, SS115L application, or SS115L equivalent, key selection criteria include its 150 V repetitive peak reverse voltage, thermal resistance (R_θJL = 45°C/W), moisture sensitivity level 1 rating, cathode-band polarity marking, and compatibility with automated SMT placement.

Technical Context

The SS115L operates as a single-die Schottky rectifier optimized for switching-mode power conversion, with junction temperature range up to +150°C and critical dV/dt rating of 10,000 V/µs. Its low forward voltage drop and fast recovery enable high efficiency in high-frequency SMPS topologies.

Designed for surface-mount assembly, it uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD 201 Class 2 whisker resistance. The Sub SMA case conforms to UL 94V-0 flammability and includes a guard ring for overvoltage protection.

Key Specifications

Pinout & Package

Package: Sub SMA - compact surface-mount outline with cathode band marking, UL 94V-0 molding compound, and matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB1150-TB and SS115HE3/5BT, the SS115L offers the smallest footprint among 150 V/1 A Schottky rectifiers with verified MSL 1 handling and optimized thermal path via Sub SMA leads - making it preferred for space-constrained, high-volume consumer power supplies where reflow yield and thermal margin are prioritized.

Availability

SS115L is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and DC/DC converters requiring stable component supply, consistent parametric performance across production lots, and full traceability from wafer to shipment.

Supply support for SS115L 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 for industrial and consumer markets.

The SS115L belongs to TSC's SS1xL Schottky rectifier family, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in space-limited applications where low V_F, robust surge capability, and MSL 1 handling are essential.

FAQ

What is the maximum junction temperature rating for the SS115L?

The SS115L has a maximum junction temperature (T_J) rating of +150°C, as specified in its Absolute Maximum Ratings table. This allows reliable operation in high-ambient environments such as enclosed industrial power supplies or automotive under-hood applications when properly heatsinked. The SS115L maintains full electrical specifications up to this limit, unlike lower-voltage variants rated only to +125°C.

Does the SS115L have a guard ring, and what function does it serve?

Yes, the SS115L incorporates a guard ring structure explicitly cited in its features list. This design element improves edge termination robustness, enhancing the device's ability to withstand transient overvoltage conditions - such as line surges or inductive kickback - without premature avalanche breakdown. It contributes directly to the SS115L's 10,000 V/µs dV/dt rating and reliability in noisy power systems.

What is the forward voltage of the SS115L at 1.0 A and 25°C?

The SS115L exhibits a maximum forward voltage (V_F) of 0.900 V at 1.0 A and 25°C, per its Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the upper bound for conduction loss calculation. At elevated temperatures or lower currents, V_F decreases - e.g., typical V_F at 0.5 A and 25°C is 0.750 V.

Is the SS115L compatible with lead-free reflow processes?

Yes, the SS115L is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its Sub SMA package is rated for peak reflow temperatures up to 260°C. With Moisture Sensitivity Level 1 classification per J-STD-020, the SS115L may be placed directly from dry pack without baking - simplifying manufacturing flow and reducing defect risk.

How does the SS115L differ from the SS110L in terms of electrical performance?

The SS115L differs from the SS110L primarily in its higher 150 V V_RRM (vs. 100 V), resulting in higher reverse leakage (50 µA vs. 50 µA at 25°C - same value) but significantly higher V_F (0.900 V vs. 0.800 V at 1.0 A). Both share identical I_F, I_FSM, and thermal ratings. The SS115L is selected when system-level transient margin or higher input voltage ranges demand extended reverse blocking capability.