Taiwan Semiconductor Corporation 1T7G

Overview

1T7G from Taiwan Semiconductor is a single-die standard rectifier diode rated for 1000 V repetitive peak reverse voltage (VRRM), 1 A average forward current (IF), and 30 A non-repetitive surge current (IFSM), with low forward voltage (1.0 V at 1 A, 25°C) and 10 pF junction capacitance - used in high-voltage DC-DC converters and industrial inverters.

For engineers reviewing the 1T7G datasheet, 1T7G pinout, 1T7G application, or 1T7G equivalent, key selection factors include its TS-1 package thermal resistance (100°C/W), AEC-Q101 qualification option (1T7GH), 150°C max junction temperature, and cathode-band polarity marking for reliable high-surge rectification in compact power stages.

Technical Context

The 1T7G operates as a unidirectional silicon PN junction rectifier optimized for high-voltage switching-mode power supplies. Its 1000 V VRRM rating enables use in 800 V bus systems, while the 1.0 V typical forward voltage at 1 A and 25°C supports efficiency-critical designs.

Thermally, it features a TS-1 package with 100°C/W junction-to-ambient resistance and a 150°C maximum junction temperature, enabling operation up to 75°C ambient at full 1 A load without derating. Reverse leakage remains ≤5 µA at 25°C and ≤100 µA at 125°C under rated VR.

Key Specifications

Pinout & Package

Package: TS-1 - 3 mm miniature molded body, RoHS-compliant, halogen-free, UL 94V-0 rated compound, pure tin-plated leads, cathode polarity indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06 and MUR110, the 1T7G delivers superior voltage margin and lower forward drop in a compact, surface-mount-compatible TS-1 package - making it optimal for space-constrained, high-input-voltage industrial and automotive power stages where thermal resistance and surge robustness are critical.

Availability

1T7G is available at Aetrix Electronics and suitable for industrial DC-DC converters, solar microinverters, and automotive on-board chargers requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified variants.

Supply support for 1T7G 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 industrial, computing, and automotive markets since 1979.

The 1T7G belongs to TSC's TS-1 standard rectifier family, designed specifically for high-voltage, medium-current rectification in compact power supplies where reliability, surge tolerance, and thermal efficiency are prioritized over ultra-fast recovery.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) rating for the 1T7G?

The 1T7G has a VRRM rating of 1000 V, confirmed in the Absolute Maximum Ratings table across all five document versions. This value is specific to the 1T7G variant and distinguishes it from lower-voltage members like 1T1G (50 V) and 1T6G (800 V). The 1000 V rating enables use in 800 V DC bus systems with appropriate safety margin and is validated under standard test conditions per JEDEC JESD201.

Is the 1T7G available in an AEC-Q101 qualified version?

Yes, the AEC-Q101 qualified version of the 1T7G is designated as 1T7GH, explicitly noted in the Ordering Information section. The "H" suffix indicates qualification to AEC-Q101 stress test standards for discrete semiconductors, including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. The 1T7GH shares identical electrical and thermal specifications with the standard 1T7G.

What package type does the 1T7G use, and what are its key mechanical attributes?

The 1T7G uses the TS-1 package, a 3 mm miniature molded body specified in the Mechanical Data and Package Outline Dimensions sections. Key attributes include UL 94V-0 flammability rating, pure tin-plated leads compliant with J-STD-002 solderability, JESD201 Class 2 whisker resistance, and cathode polarity marked by a visible band. Its weight is approximately 0.200 g.

What is the typical forward voltage (VF) of the 1T7G at 1 A and 25°C?

The typical forward voltage of the 1T7G is 1.0 V at 1 A and 25°C, as stated in the Electrical Specifications table under "1T3G – 1T7G" grouping. This value is lower than earlier variants (e.g., 1T1G/1T2G: 1.1 V), reflecting process optimization for higher-voltage members. The measurement uses a 0.3 ms pulse test condition, per Note 1 in the datasheet.

Does the 1T7G have a specified junction-to-ambient thermal resistance (RθJA)?

Yes, the 1T7G has a specified RθJA of 100°C/W, listed in the Thermal Performance section. This value applies to the device mounted on a standard FR-4 PCB with minimal copper area and is critical for calculating junction temperature rise under 1 A DC load. It is higher than TO-220 devices due to the compact TS-1 form factor, requiring careful thermal layout in sustained-power applications.