Taiwan Semiconductor Corporation SK520C R6

Overview

SK520C R6 from Taiwan Semiconductor is a 5A, 200V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching power supplies with low forward voltage (0.95 V at 5 A, 25°C), high surge capability (120 A), and junction temperature up to 150°C. It serves as the output rectifier in DC-DC converters and AC-DC adapters.

For engineers reviewing the SK520C R6 datasheet, SK520C R6 pinout, SK520C R6 application, or SK520C R6 equivalent, key selection criteria include its 200 V repetitive peak reverse voltage, 0.95 V forward voltage at rated current, 0.3 mA reverse leakage at 25°C, thermal resistance of 13°C/W (junction-to-lead), and DO-214AB mechanical compatibility with automated SMT placement.

Technical Context

The SK520C R6 is a single-die, unidirectional Schottky rectifier with cathode-band polarity indication and guard-ring structure for enhanced overvoltage robustness. Its 200 V V_RRM rating targets mid-to-high-voltage SMPS outputs where fast recovery and low conduction loss are critical.

Thermal performance is defined for PCB mounting on a 16 mm × 16 mm copper pad: R_θJL = 13°C/W enables efficient heat transfer to the PCB lead frame, while R_θJA = 53°C/W reflects ambient-limited dissipation under standard test conditions.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by band. Weight: 0.210 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-50WQ03FNTR-M3 and SB5200-E3/54, the SK520C R6 uniquely balances 200 V capability, 0.95 V forward drop, and DO-214AB thermal robustness-making it optimal for industrial and adapter designs requiring both voltage margin and thermal headroom.

Availability

SK520C R6 is available at Aetrix Electronics and suitable for laptop adapters, LED drivers, industrial DC-DC converters, and USB-C power delivery modules requiring stable component supply and long-term manufacturability.

Supply support for SK520C R6 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 management and industrial markets since 1979.

The SK52C–SK520C family is engineered specifically for high-reliability, high-efficiency rectification in switching-mode power supplies-emphasizing ruggedness, thermal stability, and SMT process compatibility across 20–200 V ratings.

FAQ

What is the maximum junction temperature rating for the SK520C R6?

The SK520C R6 has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet revision S2311. This rating permits reliable operation in sealed or high-ambient-temperature environments such as enclosed LED drivers and industrial power modules. Derating curves in Figure 1 confirm usable current capacity down to 0 A at 150°C ambient when mounted on standard 16 mm × 16 mm Cu pads.

Does the SK520C R6 have a specified moisture sensitivity level (MSL)?

Yes, the SK520C R6 is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/85% RH and requires no baking prior to reflow soldering. This eliminates pre-conditioning steps in high-volume SMT lines and reduces risk of popcorning or delamination during assembly-confirmed in the Mechanical Data section of the Taiwan Semiconductor SK52C–SK520C datasheet.

What is the forward voltage of the SK520C R6 at 5 A and 125°C junction temperature?

The SK520C R6 forward voltage is not explicitly specified at 125°C in the published datasheet; only the 25°C value (0.95 V max) and 150°C thermal limit are provided. However, typical Schottky V_F decreases ~2 mV/°C, so extrapolation suggests ~0.85 V at 125°C-though design margins should rely on the 25°C max value unless application-specific characterization is performed. The SK520C R6 datasheet does not publish a guaranteed V_F curve above 25°C.

Is the SK520C R6 halogen-free and RoHS compliant?

Yes, the SK520C R6 is both halogen-free and RoHS compliant, as stated in the FEATURES section of the Taiwan Semiconductor SK52C–SK520C datasheet (Version S2311). Compliance is verified per JEDEC J-STD-609 for halogen content and EU Directive 2011/65/EU for restricted substances, supporting environmental requirements for consumer, industrial, and medical-grade end equipment.

What is the cathode marking method used on the SK520C R6 package?

The SK520C R6 uses a visible cathode band on the molded DO-214AB (SMC) body to indicate polarity, consistent with JEDEC DO-214 standards. As shown in the PACKAGE OUTLINE DIMENSIONS diagram (Page 6, S2311), the band is located adjacent to the cathode lead and aligns with the "CATHODE INDICATOR" label in the marking diagram. This marking is laser-etched or molded-in and remains legible after reflow and conformal coating.