Taiwan Semiconductor Corporation SK23A

Overview

SK23A from Taiwan Semiconductor is a 2 A, 30 V Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, optimized for high-efficiency switching power supplies and adapters. It delivers low forward voltage (0.50 V at 2 A, 25°C), high surge current capability (50 A), and operates up to 150°C junction temperature.

For engineers reviewing the SK23A datasheet, SK23A pinout, SK23A application, or SK23A equivalent, key selection criteria include its 30 V repetitive peak reverse voltage, 0.50 V forward voltage at rated current, 50 A surge rating, thermal resistance of 88°C/W, and RoHS/halogen-free compliance for industrial and consumer power designs.

Technical Context

The SK23A uses a single-die Schottky structure with guard ring over-voltage protection, enabling fast recovery and low switching losses. Its 30 V V_RRM and 0.50 V V_F at 2 A support efficient operation in low-voltage DC-DC stages and secondary-side rectification.

Rated for 150°C maximum junction temperature and moisture sensitivity level 1 (J-STD-020), it supports reflow-compatible automated assembly. The DO-214AC (SMA) package provides robust thermal performance (R_θJA = 88°C/W) and meets UL 94V-0 flammability requirements.

Key Specifications

Pinout & Package

DO-214AC (SMA) surface-mount package with cathode indicated by band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS23 and SB230, the SK23A offers the lowest specified forward voltage (0.50 V typ) and identical MSL Level 1 and DO-214AC footprint-making it optimal for thermally aggressive, high-efficiency 24 V SMPS designs where every millivolt of drop matters.

Availability

SK23A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and LED lighting drivers requiring stable component supply and long-term manufacturing continuity.

Supply support for SK23A 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 power and signal conditioning markets since 1979.

The SK22A–SK215A family targets cost-effective, high-reliability Schottky rectification across 20–150 V ranges, emphasizing manufacturability, thermal robustness, and compliance for mainstream power conversion applications.

FAQ

What is the maximum junction temperature rating for the SK23A?

The SK23A has a maximum junction temperature (T_J) rating of +150°C, allowing operation in thermally demanding environments such as enclosed LED drivers or high-density power adapters. This rating is validated per absolute maximum ratings table in the official Taiwan Semiconductor datasheet revision S2307, and enables full 2 A current capability without derating up to ambient temperatures of ~75°C with standard PCB copper area.

Does the SK23A have a specified reverse recovery time (t_rr)?

No-the SK23A is a Schottky barrier diode and does not specify reverse recovery time (t_rr) because it operates via majority-carrier conduction and exhibits negligible stored charge. Instead, its performance is characterized by low reverse recovery charge (Q_RR) and fast turn-off behavior inherent to Schottky architecture, making it suitable for high-frequency switching applications up to several hundred kHz without switching loss penalties.

Is the SK23A lead-free and RoHS compliant?

Yes, the SK23A is fully RoHS compliant and halogen-free, as confirmed in the "Features" section of the Taiwan Semiconductor datasheet (Version S2307). Its matte tin-plated leads meet J-STD-002 solderability standards, and the molding compound satisfies UL 94V-0 flammability requirements-ensuring compatibility with modern green manufacturing processes and export regulations.

What is the cathode marking convention for the SK23A in DO-214AC package?

The cathode of the SK23A is marked by a distinct color band (typically white or black) located near one end of the DO-214AC (SMA) molded plastic body. This band aligns with the cathode terminal, which must be connected to the higher-potential node in the circuit. The marking is consistent across the SK22A–SK215A series and matches JEDEC DO-214AC mechanical standard orientation.

Can the SK23A replace a general-purpose silicon rectifier like 1N5819 in existing designs?

Yes-the SK23A can directly replace 1N5819 in most applications due to identical DO-214AC (SMA) package, same 2 A current rating, and superior 30 V V_RRM (vs. 1N5819's 40 V). However, note that SK23A's lower V_F (0.50 V vs. ~0.6 V) improves efficiency, while its higher I_FSM (50 A vs. 25 A) enhances surge resilience. No PCB changes are needed, but verify reverse voltage margin in 24 V systems.