Taiwan Semiconductor Corporation SK53CHM6G

Overview

SK53CHM6G from Taiwan Semiconductor is a 5A, 30V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, qualified to AEC-Q101 for automotive use. It delivers low forward voltage (0.55 V at 5 A, 25°C), high surge capability (120 A), and operates up to 150°C junction temperature. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters for car lighting systems.

For engineers reviewing the SK53CHM6G datasheet, SK53CHM6G pinout, SK53CHM6G application, or SK53CHM6G equivalent, key selection criteria include its 30 V repetitive peak reverse voltage, 0.55 V forward drop at rated current, AEC-Q101 qualification, moisture sensitivity level 1 rating, and DO-214AB thermal performance (R_θJL = 13°C/W).

Technical Context

This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its 10,000 V/µs critical dV/dt rating supports fast-switching topologies in automotive power supplies.

The device exhibits 0.5 mA max reverse leakage at 25°C and 20 mA at 100°C under rated 30 V reverse bias, enabling stable operation in thermally demanding environments. Thermal resistance values (R_θJA = 53°C/W, R_θJC = 16°C/W) are measured on a 16 mm × 16 mm copper pad PCB per JEDEC standards.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC) - molded plastic case meeting UL 94V-0 flammability rating; terminals are matte tin plated and solderable per J-STD-002; polarity indicated by cathode band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SK53CHM6G, VS-50SQ030 offers slightly lower forward voltage and better thermal resistance but no automotive qualification, while SB530 matches all critical parameters and qualifications-making it suitable for drop-in replacement where second-source assurance is needed.

Availability

SK53CHM6G is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and car interior lighting drivers requiring stable component supply across production lifecycles.

Supply support for SK53CHM6G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and automotive-grade process control.

The SK5xCH series was designed specifically for high-reliability 12 V/24 V automotive power systems, emphasizing low VF, AEC-Q101 compliance, and robust surge handling in surface-mount packaging.

FAQ

What is the maximum junction temperature rating for SK53CHM6G?

The SK53CHM6G has a maximum junction temperature (T_J) of +150°C. This rating allows reliable operation in under-hood or near-engine applications where ambient temperatures exceed 100°C. Derating curves in the datasheet show usable forward current decreases gradually above 100°C ambient, maintaining safe thermal margins up to the 150°C limit. The SK53CHM6G's R_θJL of 13°C/W further supports thermal management when soldered to adequate PCB copper area.

Is SK53CHM6G qualified for automotive applications?

Yes, SK53CHM6G is explicitly qualified to AEC-Q101 standards, covering stress tests for temperature cycling, high-temperature operating life, and mechanical shock. This qualification confirms suitability for automotive power electronics such as body control modules, lighting drivers, and infotainment power supplies. The device also meets J-STD-020 moisture sensitivity level 1, eliminating pre-reflow baking-a key requirement for high-volume automotive SMT lines.

What is the forward voltage of SK53CHM6G at full rated current?

The SK53CHM6G exhibits a typical forward voltage (V_F) of 0.55 V at 5 A and 25°C junction temperature, measured with 0.3 ms pulse width. At elevated temperatures (e.g., 125°C), V_F decreases slightly due to Schottky physics, remaining below 0.52 V. This low V_F directly reduces conduction losses in high-current paths-critical for efficiency in 24 V automotive DC/DC converters where the SK53CHM6G is commonly deployed.

Does SK53CHM6G have a specified reverse leakage current?

Yes, SK53CHM6G specifies reverse leakage current (I_R) as ≤0.5 mA at 30 V reverse bias and 25°C junction temperature, and ≤20 mA at 100°C. These values are confirmed under 30 ms pulse test conditions. Low I_R ensures minimal standby power loss in reverse-battery protection circuits and maintains regulation accuracy in flyback snubber networks where the SK53CHM6G may serve as a clamp diode.

What package type does SK53CHM6G use, and what are its key mechanical features?

SK53CHM6G uses the DO-214AB (SMC) surface-mount package, with dimensions per JEDEC standard: length 7.75 mm, width 6.25 mm, height 2.45 mm. Key features include UL 94V-0 molded compound, matte tin-plated leads compliant with J-STD-002, cathode band polarity marking, and a weight of approximately 0.210 g. The package supports automated placement and reflow soldering without moisture sensitivity concerns (MSL Level 1).