Taiwan Semiconductor Corporation SS515ALH

Overview

SS515ALH from Taiwan Semiconductor is a 5A, 150V Schottky barrier surface-mount rectifier in Thin SMA package, featuring 0.81V forward voltage at 5A/25°C, 126pF junction capacitance, 110A surge current rating, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the SS515ALH datasheet, SS515ALH pinout, SS515ALH application, or SS515ALH equivalent, key selection considerations include its 150V reverse voltage rating, low thermal resistance (R_θJL = 17°C/W), moisture sensitivity level 1 compliance, and suitability for high-efficiency DC/DC conversion in space-constrained layouts.

Technical Context

The SS515ALH operates as a single-die Schottky rectifier optimized for high-frequency switching applications, with a 150V peak repetitive reverse voltage (V_RRM) and 5A average forward current (I_F). Its low forward voltage drop minimizes conduction losses while maintaining stable performance up to 150°C junction temperature.

Thermal design is supported by verified R_θJL = 17°C/W and R_θJA = 78°C/W on a 5mm × 5mm Cu pad PCB, and electrical behavior is characterized across temperature (–55°C to +150°C) with reverse leakage ≤10µA at 25°C and ≤1mA at 125°C.

Key Specifications

Pinout & Package

Package: Thin SMA - Surface-mount, single-anode/single-cathode configuration with cathode band polarity marking, matte tin-plated leads, UL 94V-0 molding compound, and 0.028g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS515ALH, VS-50SQ030 offers lower forward loss but insufficient voltage headroom for 150V applications, while SB5150 matches voltage rating and package but delivers marginally higher V_F, affecting thermal performance in high-duty-cycle operation.

Availability

SS515ALH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS designs, and LED driver power stages requiring stable component supply, AEC-Q101 compliance, and consistent Thin SMA packaging.

Supply support for SS515ALH 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101 validation capabilities.

The SS515ALH belongs to TSC's SS5xALH Schottky rectifier family, engineered for high-efficiency, high-reliability power conversion in automotive and industrial applications where thermal performance and moisture resilience are critical.

FAQ

What is the maximum junction temperature rating for SS515ALH?

The SS515ALH has a maximum junction temperature (T_J) of +150°C, validated across its full operating range from –55°C to +150°C. This rating allows reliable deployment in under-hood automotive environments and enclosed industrial enclosures. Thermal design must respect R_θJL = 17°C/W to maintain safe operation within this limit. The SS515ALH datasheet confirms continuous operation up to this temperature with appropriate PCB copper area.

Is SS515ALH suitable for automotive applications?

Yes, SS515ALH is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. Its Thin SMA package meets J-STD-020 Level 1 moisture sensitivity, eliminating bake requirements prior to reflow. These attributes make SS515ALH appropriate for automotive power modules, body control units, and ADAS subsystems where reliability under thermal and mechanical stress is mandatory.

What is the forward voltage of SS515ALH at 5A and 125°C?

The SS515ALH exhibits a typical forward voltage of 0.67 V at 5A and 125°C, with a maximum of 0.77 V under those conditions. This low, temperature-stable V_F ensures minimal conduction loss during elevated ambient operation-critical for automotive and industrial systems where thermal derating cannot compromise efficiency. The SS515ALH datasheet specifies this value using pulse testing (PW = 0.3ms) to avoid self-heating artifacts.

Does SS515ALH have halogen-free and RoHS-compliant construction?

Yes, SS515ALH is both RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound, lead finish (matte tin), and internal materials meet these environmental standards without compromising electrical or thermal performance. This compliance supports export to EU, China, and other regulated markets and aligns with sustainability goals in consumer, industrial, and automotive end equipment. The SS515ALH product documentation explicitly states both certifications.

What is the junction-to-lead thermal resistance (R_θJL) of SS515ALH?

The SS515ALH has a typical junction-to-lead thermal resistance (R_θJL) of 17°C/W, measured on a standard 5mm × 5mm copper pad test board. This low value enables efficient heat transfer from the die directly into the PCB copper, reducing reliance on external heatsinks and supporting compact, high-power-density designs. The SS515ALH thermal performance data sheet confirms this parameter is representative of real-world mounting conditions used in production assemblies.