Taiwan Semiconductor Corporation SK54C R6G

Overview

SK54C R6G from Taiwan Semiconductor is a 5A, 40V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, featuring 0.55V forward voltage at 5A/25°C, 120A surge current capability, and guard ring overvoltage protection. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters and AC-DC adapters.

For engineers reviewing the SK54C R6G datasheet, SK54C R6G pinout, SK54C R6G application, or SK54C R6G equivalent, key selection criteria include forward voltage drop at rated current, reverse leakage at elevated junction temperature, thermal resistance (R_θJL = 13°C/W), and compliance with JESD201 Class 2 whisker testing for lead reliability.

Technical Context

The SK54C R6G implements a single-die Schottky junction optimized for low conduction loss in continuous forward-biased operation. Its 40V repetitive peak reverse voltage (V_RRM) and 120A non-repetitive surge rating support transient-heavy switching topologies.

Thermal performance is defined by R_θJL = 13°C/W and R_θJA = 53°C/W on a 16mm × 16mm Cu pad PCB, enabling stable operation up to T_J = 150°C. Reverse leakage remains ≤0.5mA at 25°C and ≤20mA at 100°C under rated V_R.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, cathode indicated by band, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-50SQ040 and SB540, the SK54C R6G delivers the lowest forward voltage among 40V/5A Schottkys while retaining superior surge immunity and guard ring protection-critical for long-lifecycle industrial and lighting applications.

Availability

SK54C R6G is available at Aetrix Electronics and suitable for AC-DC adapters, USB PD fast-charging converters, and LED driver designs requiring stable component supply, full traceability, and long-term manufacturing continuity.

Supply support for SK54C R6G 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 electronics and industrial markets since 1979.

The SK52C–SK520C family targets high-efficiency, surface-mount Schottky rectification in space-constrained power supplies, emphasizing low V_F, rugged surge capability, and automotive-grade reliability testing.

FAQ

What is the maximum junction temperature rating for SK54C R6G?

The SK54C R6G has a maximum junction temperature (T_J) rating of +150°C. This allows sustained operation in thermally demanding environments such as enclosed LED drivers or industrial DC-DC modules. Derating curves in the official datasheet specify allowable forward current reduction above 25°C ambient, and thermal design must ensure R_θJA = 53°C/W is achieved using a 16mm × 16mm copper pad per the JEDEC test board condition. The SK54C R6G maintains reliable performance up to this limit when mounted per recommended layout.

Does SK54C R6G have a guard ring structure, and why does it matter?

Yes, the SK54C R6G incorporates a guard ring for overvoltage protection, explicitly stated in its features list. This structure improves edge termination robustness and prevents premature avalanche breakdown under transient voltage stress. In real-world applications like AC-DC adapters exposed to line surges or LED drivers subject to inductive kickback, the guard ring significantly enhances long-term reliability compared to non-guarded Schottky diodes. The SK54C R6G's guard ring is a key differentiator versus alternatives such as SB540, which lacks this feature.

What is the forward voltage of SK54C R6G at 5A and 100°C junction temperature?

The forward voltage (V_F) of SK54C R6G is specified as 0.55V maximum at I_F = 5A and T_J = 25°C. While the datasheet does not provide a tabulated V_F value at 100°C, Figure 4 (Typical Forward Characteristics) shows that V_F decreases slightly with rising temperature for Schottky diodes. At 100°C, V_F remains below 0.53V under the same 5A condition. This behavior is inherent to the SK54C R6G's metal-semiconductor junction and contributes to stable thermal feedback in high-power rectification circuits.

Is SK54C R6G compatible with lead-free reflow soldering processes?

Yes, SK54C R6G is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level is rated at Level 1 per J-STD-020-meaning it can be stored indefinitely at ≤30°C/85% RH without baking prior to assembly. The device withstands peak reflow temperatures up to 260°C, making it suitable for standard Pb-free SAC305 profiles. This compatibility is confirmed in the Mechanical Data section of the SK54C R6G documentation and applies across the entire SK52C–SK520C series.

What packaging option is available for SK54C R6G, and how many units per reel?

The SK54C R6G is supplied in DO-214AB (SMC) package on tape-and-reel format, with 3,000 units per reel. This packaging supports high-speed automated placement in SMT lines and complies with EIA-481 standards. The reel orientation and pocket dimensions match JEDEC DO-214AB mechanical outlines, ensuring compatibility with standard pick-and-place feeders. No alternate packaging (e.g., bulk or ammo pack) is listed for SK54C R6G in the official ordering information-only tape-and-reel is supported. This configuration applies uniformly to all SK5xC variants including SK54C R6G.