Taiwan Semiconductor Corporation SK52C M6G

Overview

SK52C from Taiwan Semiconductor is a 5A, 20V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching power supplies with low forward voltage (0.55 V at 5 A, 25°C), high surge capability (120 A), and junction temperature up to 150°C. It serves as the primary output rectifier in AC/DC adapters and DC/DC converters.

For engineers reviewing the SK52C datasheet, SK52C pinout, SK52C application, or SK52C equivalent, key selection criteria include its 20 V repetitive peak reverse voltage, 13°C/W junction-to-lead thermal resistance, moisture sensitivity level 1 rating, RoHS/halogen-free compliance, and cathode-band polarity marking - all critical for thermal reliability and automated SMT assembly.

Technical Context

The SK52C is a single-die, unidirectional Schottky rectifier designed for high-frequency switching applications where low conduction loss and fast recovery are essential. Its guard ring structure provides overvoltage protection, and its matte tin-plated leads meet J-STD-002 solderability requirements.

Thermal performance is characterized with R_θJL = 13°C/W and R_θJA = 53°C/W on a 16 mm × 16 mm Cu pad PCB. Reverse leakage remains ≤0.5 mA at 25°C and ≤20 mA at 100°C under rated V_R, supporting stable operation across industrial ambient conditions.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), molded plastic case meeting UL 94V-0, with matte tin-plated leads and cathode polarity indicated by a visible band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS52 and MBR520, the SK52C delivers optimal balance of low forward voltage, proven thermal performance on standard PCBs, and cost-effective qualification for high-volume consumer power supplies - making it the preferred choice for 20 V output designs where efficiency and manufacturability are prioritized.

Availability

SK52C is available at Aetrix Electronics and suitable for AC/DC adapters, USB-C power delivery modules, and LED driver circuits requiring stable component supply, consistent parametric performance, and full traceability from wafer to shipment.

Supply support for SK52C 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 devices, and MOSFETs since 1979.

The SK52C belongs to TSC's SK5xC Schottky rectifier family, engineered specifically for high-efficiency, high-reliability switching power conversion in cost-sensitive consumer and industrial applications - emphasizing low V_F, robust surge handling, and seamless SMT integration.

FAQ

What is the maximum junction temperature rating for the SK52C?

The SK52C has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official TSC datasheet Version S2311. This allows continuous operation in thermally demanding environments such as enclosed power adapters or industrial DC/DC converters. Derating curves confirm usable current capacity down to 2.5 A at 125°C ambient with standard PCB mounting, and the SK52C must not exceed this thermal limit to ensure long-term reliability.

Does the SK52C have a specified moisture sensitivity level (MSL)?

Yes, the SK52C is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to reflow soldering. This eliminates pre-reflow bake steps in high-volume SMT lines, reducing process complexity and cost. The MSL 1 classification is explicitly stated in the "Features" section of the TSC SK52C–SK520C datasheet (Version S2311), and applies to all units shipped in tape-and-reel packaging.

What is the forward voltage (V_F) of the SK52C at 5 A and 100°C?

The SK52C exhibits a forward voltage of ≤0.65 V at 5 A and 100°C, extrapolated from the typical V_F curve (Fig.4) and confirmed by thermal derating data in the TSC datasheet. At 25°C, V_F is 0.55 V max; the increase to ~0.65 V at 100°C reflects predictable positive temperature coefficient behavior. This value is critical for calculating conduction losses in thermal simulations and ensures stable operation without thermal runaway in sealed enclosures.

Is the SK52C RoHS and halogen-free compliant?

Yes, the SK52C is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per JEDEC JS709E standards, as documented in the "Features" section of the official TSC datasheet (Version S2311). Compliance is verified through material declarations and third-party testing. The device uses green molding compound and matte tin-plated leads, eliminating brominated flame retardants and chlorine/bromine content above threshold limits - satisfying environmental requirements for global consumer electronics markets.

What is the cathode marking convention for the SK52C?

The SK52C uses a visible cathode band printed on the molded body of the DO-214AB (SMC) package to indicate the cathode terminal, as shown in the "Marking Diagram" on page 6 of the TSC datasheet (Version S2311). This band aligns with industry-standard polarity identification and must be matched to the PCB silkscreen and footprint orientation during layout. Incorrect placement - connecting the band to the anode net - results in immediate reverse-bias failure and potential board damage.