Taiwan Semiconductor Corporation SS25H

Overview

SS25H from Taiwan Semiconductor is a 2 A, 50 V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring low forward voltage (0.70 V at 2 A, 25°C), high surge current capability (50 A), AEC-Q101 qualification, and guard ring for over-voltage protection - used in automotive DC/DC converters and reverse battery protection circuits.

For engineers reviewing the SS25H datasheet, SS25H pinout, SS25H application, or SS25H equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 0.65 V forward voltage at 2 A and 100°C, 5 mA reverse leakage at 100°C, 125–150°C junction temperature range, and DO-214AA mechanical compatibility with automated SMT placement.

Technical Context

The SS25H operates as a single-die Schottky rectifier optimized for low-loss, high-frequency switching in automotive and industrial power supplies. Its 50 V V_RRM, 2 A continuous forward current rating, and 10,000 V/μs dV/dt support fast transient immunity in compact DC/DC topologies.

Thermal performance is defined by R_θJL = 24°C/W and R_θJA = 70°C/W, enabling reliable operation up to 150°C junction temperature. The device uses matte tin-plated leads compliant with J-STD-002 and meets JESD201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; molded plastic body meets UL 94V-0; weight ≈ 0.093 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-2EY50-M3/5BT and SB250, the SS25H delivers superior automotive qualification, higher junction temperature margin, and integrated guard ring protection - making it the preferred choice for thermally demanding, safety-critical vehicle subsystems requiring long-term reliability without derating.

Availability

SS25H is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and LED lighting drivers requiring stable component supply across production lifecycles.

Supply support for SS25H 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 automotive, industrial, and consumer markets since 1979.

The SS25H belongs to TSC's AEC-Q101-qualified Schottky rectifier family designed specifically for high-efficiency, high-reliability power conversion in automotive electrical systems and harsh-environment industrial equipment.

FAQ

What is the maximum junction temperature rating for the SS25H?

The SS25H has a maximum junction temperature (T_J) rating of +150°C, verified per AEC-Q101 stress testing. This allows operation in under-hood automotive environments without thermal derating below 2 A continuous current. The SS25H maintains stable electrical characteristics up to this limit, supported by its 24°C/W junction-to-lead thermal resistance. Always reference the forward current derating curve in the SS25H datasheet for ambient-specific current limits.

Is the SS25H suitable for reverse battery protection in 24 V systems?

Yes, the SS25H is well-suited for reverse battery protection in 24 V automotive systems. With a 50 V V_RRM, it safely blocks reverse polarity events while sustaining 5 mA reverse leakage at 100°C - critical for hot under-hood conditions. Its AEC-Q101 qualification, guard ring, and MSL-1 rating further ensure reliability in production vehicles. The SS25H is commonly deployed in series with the battery feed to ECUs and lighting modules.

Does the SS25H have a halogen-free and RoHS-compliant construction?

Yes, the SS25H uses halogen-free molding compound and complies with RoHS Directive 2011/65/EU. All materials meet IEC 61249-2-21 requirements, and the matte tin-plated leads satisfy J-STD-002 solderability standards. This ensures environmental compliance for global automotive and industrial shipments. The SS25H marking includes "G" for green compound, confirming halogen-free status per TSC documentation.

What is the forward voltage of the SS25H at elevated temperature?

At 2 A forward current and 100°C junction temperature, the SS25H exhibits a typical forward voltage (V_F) of 0.65 V. This lower V_F at high temperature - compared to 0.70 V at 25°C - reflects the negative temperature coefficient inherent to Schottky diodes and contributes to thermal stability in high-power-density designs. The SS25H datasheet specifies this value under pulse test conditions (PW = 0.3 ms).

How is polarity indicated on the SS25H package?

Polarity on the SS25H is indicated by a cathode band printed on the molded plastic body of the DO-214AA (SMB) package. The banded end corresponds to the cathode terminal, while the opposite end is the anode. This marking aligns with JEDEC standard orientation and is visible under standard AOI inspection. The SS25H marking code "SS25" appears adjacent to the band, confirming part identity and orientation during automated placement.