Taiwan Semiconductor Corporation SK24A

Overview

SK24A from Taiwan Semiconductor is a 2 A, 40 V Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, optimized for high-efficiency switching power supplies and DC/DC converters where low forward voltage and fast recovery are critical. It delivers 0.50 V typical VF at 2 A and 25°C, supports 50 A non-repetitive surge current, and operates up to 125°C junction temperature.

For engineers reviewing the SK24A datasheet, SK24A pinout, SK24A application, or SK24A equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 0.50 V forward voltage at rated current, 88 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT placement per J-STD-020 Level 1 moisture sensitivity.

Technical Context

The SK24A employs a single-die Schottky structure with guard ring over-voltage protection, enabling robust operation under transient conditions. Its low VF minimizes conduction loss in high-frequency SMPS topologies, while its 10,000 V/µs dV/dt rating ensures stable blocking during rapid voltage transitions.

Designed for surface-mount use in compact power stages, it features matte tin-plated leads compliant with J-STD-002 solderability and meets UL 94V-0 flammability requirements. The cathode band polarity marking and DO-214AC mechanical outline ensure unambiguous orientation during assembly.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount plastic case with cathode band marking. Dimensions per JEDEC DO-214AC, 4.60 mm × 2.83 mm × 2.30 mm body size, 0.13 mm lead thickness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS24 and SB240, the SK24A offers the lowest typical forward voltage (0.50 V) and highest surge rating (50 A) in its 40 V class, making it optimal for thermally constrained, high-reliability SMPS outputs where efficiency and transient robustness are prioritized.

Availability

SK24A is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting drivers requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SK24A 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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The SK22A–SK215A family was developed specifically for high-efficiency, surface-mount AC/DC and DC/DC power conversion, emphasizing low VF, high surge tolerance, and J-STD-020 Level 1 manufacturability.

FAQ

What is the maximum junction temperature rating for SK24A?

The SK24A has a maximum junction temperature (T_J) rating of 125°C, as specified in the Absolute Maximum Ratings table. This allows operation in sealed enclosures or high-ambient environments when properly derated per the Forward Current Derating Curve. The SK24A must not exceed this limit during steady-state or transient conditions to ensure reliability and avoid parametric shift.

Does SK24A have a halogen-free and RoHS-compliant construction?

Yes, the SK24A is both halogen-free and RoHS compliant, as explicitly stated in the FEATURES section of the official datasheet. The molding compound and plating meet IPC-1752A reporting standards, and the matte tin-plated leads satisfy J-STD-002 solderability requirements-making SK24A suitable for environmentally regulated industrial and consumer end products.

What is the forward voltage specification for SK24A at 2 A and 25°C?

The SK24A exhibits a typical forward voltage (V_F) of 0.50 V at 2 A and 25°C, with no maximum value specified in the Electrical Specifications table. This low V_F is measured under pulse test conditions (PW = 0.3 ms), reflecting real-world conduction loss in high-frequency switching applications where duty cycle is low.

Is SK24A pin-compatible with other parts in the SK22A–SK215A series?

Yes, all parts in the SK22A–SK215A series-including SK24A-share identical DO-214AC (SMA) package dimensions, pinout, and mechanical footprint. This allows direct substitution across voltage grades (20 V to 150 V) without PCB layout changes, provided electrical parameters (V_RRM, V_F, I_R) meet the target application's requirements.

What is the moisture sensitivity level (MSL) rating for SK24A?

The SK24A is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and requires no baking prior to surface-mount reflow. This eliminates dry-pack handling and floor-life tracking, simplifying SMT line integration and reducing manufacturing overhead for high-volume production.