Taiwan Semiconductor Corporation SK55C V6G

Overview

SK55C V6G from Taiwan Semiconductor is a 5A, 50V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching power supplies with low forward voltage (0.75 V at 5 A, 25°C), high surge capability (120 A), and junction temperature up to 150°C. It serves as a primary output rectifier in AC/DC adapters and DC/DC converters.

For engineers reviewing the SK55C V6G datasheet, SK55C V6G pinout, SK55C V6G application, or SK55C V6G equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 0.75 V forward voltage at rated current, 13 °C/W junction-to-lead thermal resistance, moisture sensitivity level 1 compliance, and cathode-band polarity marking - all critical for thermal management and automated assembly in compact power designs.

Technical Context

The SK55C V6G implements 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 10,000 V/µs critical dV/dt rating supports reliable performance in high-frequency SMPS topologies.

Thermally, it delivers 13 °C/W junction-to-lead resistance when mounted on a 16 mm × 16 mm Cu pad PCB, allowing sustained 5 A conduction without exceeding 150°C junction limit under typical board-level cooling. The device is halogen-free and RoHS compliant, meeting JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, molded 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 SS55-E3/57T and MBR550, the SK55C V6G offers a balanced trade-off: lower leakage than MBR550 and tighter V_F consistency across temperature versus SS55-E3/57T, making it optimal for cost-sensitive, thermally moderate 50 V-output power supplies requiring J-STD-020 Level 1 handling.

Availability

SK55C V6G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial DC/DC converters requiring stable component supply, consistent parametric performance, and full traceability through tape-and-reel packaging (3,000 units per reel).

Supply support for SK55C V6G 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 for industrial and consumer markets.

The SK52C–SK520C family was engineered specifically for high-volume, cost-sensitive switching power supplies demanding robust surge immunity, low thermal resistance, and seamless SMT integration - with SK55C V6G targeting the 48–54 V output segment.

FAQ

What is the maximum junction temperature rating for the SK55C V6G?

The SK55C V6G has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official TSC datasheet revision S2311. This rating permits operation in enclosed power supplies and high-ambient environments, provided thermal design maintains junction temperature below this limit using the specified 16 mm × 16 mm Cu pad layout. The SK55C V6G's R_θJL of 13 °C/W supports this rating under typical board-level cooling.

Does the SK55C V6G have a specified reverse recovery time (t_rr)?

No, the SK55C V6G does not specify reverse recovery time because it is a Schottky barrier rectifier - a majority-carrier device with inherently negligible reverse recovery charge and time. This eliminates switching losses associated with minority-carrier storage, making the SK55C V6G especially suitable for high-frequency SMPS designs above 200 kHz. The SK55C V6G datasheet confirms this behavior via absence of t_rr parameter and inclusion of dV/dt rating only.

What is the marking code for the SK55C V6G on the device body?

The SK55C V6G is marked "SK55C" on the device body, per the ordering information and marking diagram in the TSC datasheet S2311. The "V6G" suffix denotes tape-and-reel packaging and green compound (halogen-free) material; it does not appear on the physical device. Polarity is indicated by a cathode band adjacent to the marking, consistent with DO-214AB mechanical standard.

Is the SK55C V6G suitable for use in automotive applications?

The SK55C V6G is not qualified to AEC-Q101 or automotive-grade reliability standards, and TSC documentation explicitly states these devices are "not designed for use in medical, life-saving, or life-sustaining applications." While its 150°C junction rating and robust surge capability may suggest suitability, the SK55C V6G lacks automotive-specific qualification, PPAP support, and extended temperature validation beyond −55°C to +150°C. Use in automotive systems requires formal qualification of the specific SK55C V6G lot.

What is the moisture sensitivity level (MSL) and reflow profile compliance for the SK55C V6G?

The SK55C V6G 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. It supports standard lead-free reflow profiles with peak temperature up to 260°C, and its matte tin-plated leads meet solderability requirements per J-STD-002. This MSL Level 1 rating simplifies manufacturing logistics and reduces SMT line downtime compared to higher-MSL discrete rectifiers.