Taiwan Semiconductor Corporation TUAS8JH

Overview

TUAS8JH from Taiwan Semiconductor is a single-die, AEC-Q101-qualified standard surface-mount rectifier in TO-277A (SMPC4.6U) package, rated for 600 V repetitive peak reverse voltage (VRRM), 8 A average forward current (IF), and 230 A surge current (IFSM) at 8.3 ms. It delivers low forward voltage (VF = 0.96 V typ. @ 8 A, 25°C) and exhibits 62 pF junction capacitance at 1 MHz, 4.0 V reverse bias - suited for automotive DC-DC converters and snubber circuits.

For engineers reviewing the TUAS8JH datasheet, TUAS8JH pinout, TUAS8JH application, or TUAS8JH equivalent, key selection criteria include its 600 V VRRM rating, wettable flank leads for automated optical inspection, JESD201 Class 2 whisker resistance, and thermal performance (RθJL = 4°C/W) on standard PCB mounting.

Technical Context

The TUAS8JH is a silicon planar junction standard rectifier with unidirectional conduction and cathode-band polarity marking. Its single-die construction supports high-reliability operation across –55°C to +150°C junction temperature range, and it meets moisture sensitivity level 1 per J-STD-020.

Designed for high-efficiency power conversion, it features low conduction loss (VF ≤ 1.10 V max @ 8 A, 25°C) and low leakage (IR ≤ 5 µA max @ 25°C, rated VR), with thermal resistance optimized for surface-mount thermal management on 16 mm × 16 mm Cu pads.

Key Specifications

Pinout & Package

TO-277A (SMPC4.6U) surface-mount package with two terminals: anode and cathode. Cathode identified by molded band. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker requirements. Weight: 0.104 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-8EWH06FN-M3/45 and MUR860G, the TUAS8JH offers superior manufacturability via wettable flanks and MSL Level 1, tighter VF consistency at high temperature, and automotive-grade qualification - making it optimal for SMT-based automotive power modules where AOI, thermal density, and qualification rigor are mandatory.

Availability

TUAS8JH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and industrial snubber networks requiring stable component supply, AEC-Q101 compliance, and surface-mount thermal efficiency.

Supply support for TUAS8JH 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 diodes, and MOSFETs for automotive and industrial markets.

The TUAS8JH belongs to TSC's AEC-Q101-qualified surface-mount rectifier family, engineered specifically for high-reliability, high-density power conversion in automotive subsystems where thermal robustness and process compatibility are critical.

FAQ

What is the peak repetitive reverse voltage rating for TUAS8JH?

The TUAS8JH has a peak repetitive reverse voltage (VRRM) rating of 600 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version A2111). This value defines the maximum reverse voltage the device can block continuously without breakdown under specified thermal conditions. The TUAS8JH is part of the TUAS8DH–TUAS8MH series, where the letter 'J' explicitly denotes the 600 V variant.

Does TUAS8JH have wettable flank leads, and why does it matter?

Yes, TUAS8JH features wettable flank leads, as stated in the FEATURES section of the official datasheet. This design enables automated optical inspection (AOI) of solder joint quality on the side edges of the TO-277A package - a critical requirement for automotive electronics manufacturing. The TUAS8JH's wettable flanks directly support zero-defect assembly goals in high-reliability SMT lines.

Is TUAS8JH qualified to AEC-Q101, and what testing does that include?

Yes, TUAS8JH is explicitly AEC-Q101 qualified per the datasheet's FEATURES list. AEC-Q101 certification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, mechanical shock, and highly accelerated stress test (HAST), ensuring suitability for automotive underhood applications. This qualification applies specifically to the TUAS8JH variant, not inferred from the family.

What is the junction-to-lead thermal resistance (RθJL) of TUAS8JH, and how is it measured?

The TUAS8JH has a typical junction-to-lead thermal resistance (RθJL) of 4°C/W, as published in the THERMAL PERFORMANCE table. This value is measured with the device mounted on a standardized 16 mm × 16 mm copper pad PCB per JEDEC standards. It reflects the dominant thermal path from die to soldered lead - a key parameter for estimating temperature rise in compact automotive power layouts where the TUAS8JH operates.

Can TUAS8JH replace TUAS8GH in a 400 V design, and what should be verified?

No - TUAS8JH is rated for 600 V VRRM, while TUAS8GH is rated for 400 V. Substituting TUAS8JH into a 400 V design is electrically safe but may incur unnecessary cost and footprint penalty. To verify compatibility, confirm that the PCB land pattern matches TO-277A (SMPC4.6U), that thermal design accounts for identical RθJL, and that the TUAS8JH's 62 pF junction capacitance does not alter snubber dynamics in the original TUAS8GH circuit.