Taiwan Semiconductor Corporation SK52C V7G

Overview

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

Technical Context

The SK52C employs a single-die Schottky structure with guard ring overvoltage protection, enabling fast recovery (no reverse recovery time specified, inherent to Schottky) and stable operation under transient surge conditions. Its 0.55 V forward voltage at rated 5 A current directly reduces conduction loss in low-voltage, high-current output stages.

Thermal performance is defined by R_θJL = 13°C/W (junction-to-lead) and R_θJA = 53°C/W (junction-to-ambient on 16 mm × 16 mm Cu pad), supporting continuous 5 A operation with appropriate PCB copper area. The device operates across -55°C to +150°C junction temperature range and meets JESD 201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount plastic case with 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 SS52 and SB520-E3/54, the SK52C offers the best balance of low V_F, industry-standard thermal metrics, and cost-effective qualification for industrial and consumer power supplies - especially where Level 1 MSL and halogen-free compliance are mandatory.

Availability

SK52C is available at Aetrix Electronics and suitable for AC/DC adapters, USB PD chargers, and LED driver supplies requiring stable component supply, consistent parametric performance, and long-term manufacturability.

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 secondary-side rectification in compact switching power supplies targeting consumer, industrial, and lighting markets.

FAQ

What is the maximum junction temperature rating for the SK52C?

The SK52C has a maximum junction temperature (T_JMAX) of +150°C, verified per absolute maximum ratings table in the official TSC datasheet Version S2311. This rating allows continuous operation in thermally constrained enclosures such as sealed LED drivers or compact wall adapters, provided PCB thermal design maintains junction temperature below this limit under worst-case load and ambient conditions. Derating curves in Figure 1 confirm usable current above 100°C ambient when mounted on 16 mm × 16 mm Cu pads.

Does the SK52C have a specified reverse recovery time (t_rr)?

No - the SK52C is a Schottky barrier rectifier, which inherently lacks minority-carrier storage and therefore has no defined reverse recovery time. Its unidirectional conduction and near-zero t_rr eliminate switching losses associated with PN-junction diodes, making it ideal for high-frequency SMPS designs. The datasheet omits t_rr because it is not a measurable parameter for Schottky devices like the SK52C.

Is the SK52C compatible with lead-free reflow soldering processes?

Yes - the SK52C features matte tin-plated leads qualified per J-STD-002 for solderability and is rated for lead-free reflow profiles up to 260°C peak temperature. Its moisture sensitivity level is Grade 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly. This ensures robust process compatibility in modern high-volume SMT lines using Pb-free solder paste.

What is the cathode marking method used on the SK52C package?

The SK52C uses a visible cathode band printed on the molded plastic body of the DO-214AB (SMC) package, located adjacent to the cathode lead. As shown in the official marking diagram (Page 6, Version S2311), the band is positioned on the same side as the part number "SK52C" and factory/date codes. This standardized marking ensures unambiguous polarity identification during automated optical inspection (AOI) and manual rework.

How does the SK52C's thermal resistance compare to similar 5 A Schottky rectifiers?

The SK52C specifies R_θJL = 13°C/W and R_θJA = 53°C/W (on 16 mm × 16 mm Cu pad), matching or exceeding industry benchmarks for DO-214AB-packaged 5 A Schottkys. For example, it matches Vishay SS52's R_θJL and outperforms ON SB520-E3/54's R_θJA of 55°C/W. This 2°C/W advantage improves thermal headroom in space-constrained layouts, allowing higher sustained current without derating.