Taiwan Semiconductor Corporation SK320AHR3G

Overview

SK320AHR3G from Taiwan Semiconductor is a 3 A, 200 V Schottky barrier rectifier in DO-214AC (SMA) package, optimized for high-frequency DC/DC conversion and reverse battery protection with low forward voltage (0.95 V at 3 A, 25°C) and low leakage (100 μA at 200 V, 25°C). It features AEC-Q101 qualification, guard ring over-voltage protection, and JESD201 Class 2 whisker resistance.

For engineers reviewing the SK320AHR3G datasheet, SK320AHR3G pinout, SK320AHR3G application, or SK320AHR3G equivalent, key selection criteria include peak repetitive reverse voltage (200 V), surge current capability (70 A), thermal resistance (R_θJA = 66 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for automotive and industrial power systems.

Technical Context

This discrete Schottky diode uses a single-die construction with platinum-silicide or similar low-barrier metallization to achieve fast switching (no minority-carrier storage) and low forward conduction loss. Its 200 V V_RRM rating enables use in 12 V–48 V automotive bus systems with margin against load dump transients.

The device's 10,000 V/μs dV/dt rating supports stable operation in high-di/dt environments such as synchronous rectification and freewheeling paths. Thermal design is enabled by R_θJL = 25 °C/W and R_θJA = 66 °C/W, allowing 3 A continuous current with minimal heatsinking on standard FR-4 PCBs.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, cathode indicated by molded band. Matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-3EY20-M3/5BT and SB320-E3/57T, SK320AHR3G delivers certified automotive reliability, tighter leakage control (100 μA), and superior thermal resistance (66 °C/W), making it optimal for under-hood and safety-critical power paths where long-term stability is mandatory.

Availability

SK320AHR3G is available at Aetrix Electronics and suitable for automotive LED lighting, 48 V mild hybrid power conversion, and industrial PLC power input stages requiring stable component supply, AEC-Q101 compliance, and long-lifecycle support.

Supply support for SK320AHR3G 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 Company (TSC) is a vertically integrated Taiwanese manufacturer specializing in power discrete semiconductors, including Schottky, MOSFET, and TVS devices, with global distribution and AEC-Q101 validation capability.

The SK32AH–SK320AH family was designed specifically for high-reliability automotive and industrial DC/DC power conversion, emphasizing low V_F, robust surge immunity, and extended temperature operation in harsh environments.

FAQ

What is the maximum junction temperature rating for SK320AHR3G?

The SK320AHR3G has a maximum junction temperature (T_J) of +150 °C, validated per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive applications and high-ambient industrial environments. The device maintains specified electrical parameters up to this limit, with thermal derating beginning above 75 °C ambient on standard PCB layouts. Always verify actual T_J using R_θJA = 66 °C/W and measured power dissipation in your final design.

Is SK320AHR3G suitable for reverse battery protection in 24 V automotive systems?

Yes, SK320AHR3G is well-suited for reverse battery protection in 24 V systems due to its 200 V V_RRM, which provides >8× margin over nominal voltage and withstands ISO 16750-2 load dump pulses up to 120 V. Its 100 μA reverse leakage at 25°C ensures minimal standby current draw, and AEC-Q101 qualification confirms reliability in automotive vibration, thermal cycling, and humidity environments. The DO-214AC package supports automated placement in high-volume production.

What is the forward voltage drop of SK320AHR3G at 3 A and 100°C junction temperature?

The SK320AHR3G datasheet specifies V_F ≤ 0.95 V at 3 A and 25°C, but does not provide a guaranteed maximum at 100°C. Based on typical forward characteristic curves (Fig.10), V_F increases approximately linearly with temperature - extrapolating from curve data, V_F at 3 A and 100°C is ~1.05–1.10 V. For precise thermal design, use the typical V_F vs. T_J plot in the SK32AH–SK320AH datasheet Rev B2304, page 4.

Does SK320AHR3G have halogen-free and RoHS-compliant construction?

Yes, SK320AHR3G is both halogen-free and RoHS-compliant, as explicitly stated in the "Features" section of the official Taiwan Semiconductor datasheet (Rev B2304). The molding compound meets UL 94V-0 flammability rating, and the matte tin-plated leads comply with J-STD-002 solderability standards. These attributes satisfy environmental compliance requirements for automotive, industrial, and consumer electronics markets governed by EU directives and IPC-1752A reporting.

What is the surge current rating of SK320AHR3G and how is it tested?

The SK320AHR3G has a non-repetitive peak forward surge current (I_FSM) rating of 70 A, tested per JEDEC standard with an 8.3 ms single half-sine waveform superimposed on rated DC load. This rating is validated across the full operating temperature range and reflects capability to handle motor startup currents, capacitor inrush, and load dump transients. The value appears in the Absolute Maximum Ratings table on page 1 of the SK32AH–SK320AH datasheet (Rev B2304) and is confirmed by Fig.11 transient surge curve.