Taiwan Semiconductor Corporation HT17G A1G

Overview

HT17G A1G from Taiwan Semiconductor is a 1 A, 800 V high-efficiency glass-passivated axial-lead rectifier diode in TS-1 package, featuring VF = 1.7 V at 1 A and trr = 75 ns, used in freewheeling paths of automotive DC-DC converters.

For engineers reviewing the HT17G A1G datasheet, HT17G A1G pinout, HT17G A1G application, or HT17G A1G equivalent, key selection criteria include peak reverse voltage (800 V), surge current rating (30 A), thermal resistance (95 °C/W), junction temperature range (–55 to +150 °C), and AEC-Q101 qualification status.

Technical Context

This device is a single-die, standard recovery silicon rectifier optimized for switching-mode power supplies and freewheeling applications where low forward voltage and controlled reverse recovery are critical. It uses glass passivation for junction protection and pure tin-plated leads compliant with J-STD-002 solderability.

The HT17G A1G variant belongs to the HT11G–HT18G family with fixed 1 A average forward current and graded VRRM ratings; HT17G specifically supports 800 V repetitive peak reverse voltage and exhibits 10 pF junction capacitance at 1 MHz and 4 V reverse bias.

Key Specifications

Pinout & Package

TS-1 package: axial-lead, molded epoxy case meeting UL 94V-0, cathode indicated by band, weight ≈ 0.200 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage rectifier applications.

Compared with STTH1R08 and MUR108, HT17G A1G uniquely combines AEC-Q101 qualification, TS-1 axial form factor for through-hole reliability, and 800 V/1 A rating in a halogen-free, RoHS-compliant construction-making it optimal for space-constrained automotive power modules.

Availability

HT17G A1G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching inverters, and UPS backup power supplies requiring stable component supply with full traceability and lifecycle management.

Supply support for HT17G A1G 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 automotive, industrial, and consumer markets since 1979.

The HT11G–HT18G series was designed specifically for high-reliability, high-voltage rectification in automotive power systems-emphasizing AEC-Q101 compliance, thermal robustness, and surge resilience in compact axial packages.

FAQ

What is the peak repetitive reverse voltage rating for HT17G A1G?

The HT17G A1G has a peak repetitive reverse voltage (VRRM) rating of 800 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version H2104). The 800 V rating ensures safe operation in automotive 48 V systems and industrial 400 V bus applications where transient overvoltage margins are critical. HT17G A1G maintains this rating across its full operating junction temperature range.

Is HT17G A1G qualified to AEC-Q101 standards?

Yes, HT17G A1G is AEC-Q101 qualified. The "A1G" suffix explicitly denotes AEC-Q101 qualification per the Ordering Information section of the Taiwan Semiconductor datasheet. This includes validation for temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock testing required for automotive under-hood and powertrain applications. HT17G A1G is not a generic industrial variant-it carries full automotive reliability certification.

What is the forward voltage drop of HT17G A1G at 1 A and 25°C?

The forward voltage (VF) of HT17G A1G is 1.7 V at IF = 1 A and TJ = 25°C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects. At elevated junction temperatures (e.g., 125°C), VF decreases slightly due to semiconductor physics, but system-level thermal design must ensure TJ remains within –55°C to +150°C limits to maintain reliability. HT17G A1G's 1.7 V VF balances efficiency and ruggedness for its 800 V class.

What package type does HT17G A1G use, and what are its key mechanical features?

HT17G A1G uses the TS-1 axial-lead package: a molded epoxy case rated UL 94V-0, with pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. The cathode is marked by a visible band, and typical unit weight is 0.200 g. Unlike surface-mount alternatives, TS-1 provides robust mechanical retention and thermal path via leadframe conduction-critical for high-vibration automotive environments where HT17G A1G is deployed.

How does the reverse recovery time of HT17G A1G compare to lower-voltage variants in the same family?

HT17G A1G has a reverse recovery time (trr) of 75 ns, matching HT16G and HT18G. This is longer than HT11G–HT15G (50 ns), reflecting the trade-off between higher blocking voltage and carrier lifetime control. The 75 ns trr is verified under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A test conditions. While not ultrafast, it is well-suited for 20–100 kHz switching in automotive DC-DC converters where HT17G A1G is commonly applied.