Taiwan Semiconductor Corporation SK320AH

Overview

SK320AH from Taiwan Semiconductor is a 200 V, 3 A surface-mount Schottky barrier rectifier in DO-214AC (SMA) package, optimized for high-frequency DC/DC conversion and reverse battery protection with 0.95 V forward voltage at 3 A and 100 μA reverse leakage at 200 V and 25°C.

For engineers reviewing the SK320AH datasheet, SK320AH pinout, SK320AH application, or SK320AH equivalent, key selection criteria include peak reverse voltage rating, thermal resistance (R_θJA = 66 °C/W), surge capability (70 A I_FSM), AEC-Q101 qualification, and DO-214AC mechanical compatibility.

Technical Context

The SK320AH implements a single-die Schottky junction with guard ring structure for over-voltage robustness and meets JESD201 Class 2 whisker resistance. Its low VF and fast switching enable high-efficiency operation in automotive-grade power supplies where thermal management and reliability under transient load are critical.

Rated for TJ = –55°C to +150°C and moisture sensitivity level 1 (J-STD-020), the device supports automated SMT placement and operates with dV/dt = 10,000 V/μs - enabling stable performance in noisy inverter and freewheeling circuits without snubbers.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount plastic case with cathode band marking; dimensions per JEDEC DO-214AC, weight ≈0.070 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SK320AH, VS-3EWH02-M3/45 offers lower conduction loss but no automotive qualification, while SB3200-T matches AEC-Q101 compliance and thermal performance with tighter VF tolerance - making it suitable for direct replacement in safety-critical vehicle subsystems.

Availability

SK320AH is available at Aetrix Electronics and suitable for automotive LED lighting, 12 V/24 V DC/DC converters, and reverse battery protection requiring stable component supply across production lifecycles.

Supply support for SK320AH 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 SK32AH–SK320AH family targets high-reliability surface-mount Schottky rectification in automotive power systems, emphasizing AEC-Q101 compliance, thermal robustness, and manufacturability for automated assembly lines.

FAQ

What is the maximum junction temperature rating for SK320AH?

The SK320AH has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official TSC datasheet Version B2304. This rating allows operation in under-hood automotive environments and high-temperature industrial enclosures. Derating curves confirm usable current capacity down to 1.8 A at 125°C ambient with standard PCB layout. The SK320AH must be mounted on thermally adequate copper to avoid exceeding this limit during sustained 3 A operation.

Is SK320AH suitable for reverse battery protection in 24 V commercial vehicles?

Yes, SK320AH is suitable for reverse battery protection in 24 V commercial vehicles due to its 200 V V_RRM, AEC-Q101 qualification, and 70 A I_FSM surge rating - which exceeds ISO 7637-2 Pulse 5a load dump requirements. Its 0.95 V forward drop limits power loss to <3 W at 3 A, and the DO-214AC package supports high-current PCB traces. The SK320AH's guard ring structure further enhances resilience against voltage transients common in heavy-duty vehicle electrical systems.

Does SK320AH have a halogen-free and RoHS-compliant construction?

Yes, SK320AH is explicitly stated as halogen-free and RoHS compliant in the TSC product documentation (Version B2304). The molding compound meets UL 94V-0 flammability rating, and the matte tin-plated leads satisfy J-STD-002 solderability standards. These attributes are confirmed in the "Features" and "Mechanical Data" sections and align with automotive OEM material disclosure requirements (e.g., IMDS). The SK320AH's compliance supports use in globally distributed automotive and industrial products.

What is the typical forward voltage of SK320AH at 3 A and 100°C junction temperature?

The datasheet does not specify V_F at 3 A and 100°C for SK320AH; only values at 25°C (0.95 V max) and characteristic curves are provided. However, Fig.4 shows typical forward voltage increases to ~0.85 V at 100°C for SK315AH–SK320AH group under 3 A, based on extrapolation of the curve family. For precise thermal design, engineers should apply the SK320AH's published V_F vs. T_J trend and verify with bench testing, as actual V_F at elevated temperature remains below 0.90 V in typical operating conditions.

Can SK320AH replace SK315AH in an existing design without layout changes?

Yes, SK320AH can replace SK315AH without layout changes because both share identical DO-214AC (SMA) package dimensions, pinout, and solder pad recommendations. The only differences are V_RRM (200 V vs. 150 V) and slightly higher V_F (0.95 V vs. 0.85 V max at 3 A, 25°C). This makes SK320AH a backward-compatible upgrade for designs needing enhanced reverse voltage margin, though designers should verify that the increased V_F does not impact thermal budget in high-duty-cycle applications.