Taiwan Semiconductor Corporation TUAS6MH

Overview

TUAS6MH from Taiwan Semiconductor is a 6A, 1000V standard surface-mount rectifier diode in TO-277A (SMPC4.6U) package, featuring AEC-Q101 qualification, glass passivated junction, 140A surge capability, and wettable flanks for automated optical inspection-used in automotive snubber circuits and DC-DC converters requiring high-reliability reverse blocking.

For engineers reviewing the TUAS6MH datasheet, TUAS6MH pinout, TUAS6MH application, or TUAS6MH equivalent, key selection criteria include its 1000V repetitive peak reverse voltage, 0.98V forward voltage at 6A/25°C, 150°C max junction temperature, TO-277A thermal performance (R_θJL = 5°C/W), and AEC-Q101 qualification for under-hood automotive use.

Technical Context

The TUAS6MH is a single-die, standard recovery rectifier optimized for high-voltage, medium-current switching applications. Its 1000V V_RRM, 140A I_FSM (8.3ms), and 0.98V V_F @ 6A/25°C reflect trade-offs favoring robustness over ultra-fast recovery. It uses glass passivation for junction reliability and wettable flank leads to support AOI-compatible solder joint inspection.

Thermal design relies on low R_θJL = 5°C/W and R_θJC = 7.9°C/W when mounted on a 16mm × 16mm Cu pad. Reverse leakage remains ≤5µA at 25°C and ≤13µA at 125°C, with junction capacitance of 39pF at 1MHz/4V-suitable for snubbing and flyback clamp roles where moderate speed and high voltage tolerance are prioritized.

Key Specifications

Pinout & Package

TO-277A (SMPC4.6U) surface-mount package with cathode-indicating band; matte tin-plated wettable flank leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-6EWH10 and MUR6100CT, the TUAS6MH uniquely combines AEC-Q101 qualification, wettable flanks, and TO-277A footprint-making it the only choice for automotive SMT rectification where reliability, manufacturability, and space constraints converge.

Availability

TUAS6MH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and on-board charger auxiliary supplies requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.

Supply support for TUAS6MH 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 devices, rectifiers, TVS diodes, and MOSFETs for automotive and industrial markets.

The TUAS6MH belongs to TSC's AEC-Q101-qualified standard rectifier family, designed specifically for high-voltage, high-reliability surface-mount applications in automotive power systems-including engine control units, lighting modules, and charging infrastructure.

FAQ

What is the maximum junction temperature rating for TUAS6MH?

The TUAS6MH has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official datasheet. This rating enables reliable operation in under-hood automotive environments where ambient temperatures exceed 105°C. Derating curves confirm usable current capacity down to 0A at 150°C case temperature, and the device must be thermally managed using its R_θJL = 5°C/W path to maintain safe operation. TUAS6MH maintains this rating across its full voltage range (200–1000V variants).

Is TUAS6MH pin-compatible with other parts in the TUAS6xH series?

Yes, all TUAS6xH variants-including TUAS6DH, TUAS6GH, TUAS6JH, TUAS6KH, and TUAS6MH-share identical TO-277A (SMPC4.6U) package dimensions, pinout, and thermal characteristics. The only difference is V_RRM rating (200V to 1000V), marked by distinct codes (AS6D to AS6M). TUAS6MH can replace lower-voltage variants in designs requiring higher reverse standoff, provided layout and thermal design accommodate its slightly higher V_F at elevated voltage grades.

Does TUAS6MH support automated optical inspection (AOI)?

Yes, TUAS6MH features wettable flank leads explicitly designed for AOI compatibility. Its matte tin-plated side terminals allow clear imaging of solder fillet geometry during post-reflow inspection, eliminating the need for X-ray verification in high-volume automotive SMT lines. This feature is confirmed in the mechanical data section and aligns with J-STD-002 solderability and IPC-A-610 acceptance criteria for Class 3 assemblies.

What is the forward voltage specification for TUAS6MH at elevated temperature?

At 6A and 125°C junction temperature, TUAS6MH exhibits a typical forward voltage of 0.88V with no maximum specified-consistent with silicon diode behavior where V_F decreases with rising temperature. At 3A/125°C, V_F is 0.80V typical. These values are measured under pulsed conditions (PW = 0.3ms) and enable accurate thermal modeling in high-temperature automotive applications where TUAS6MH operates continuously near its 150°C limit.

How does TUAS6MH's surge current rating compare across pulse durations?

TUAS6MH is rated for 140A peak surge current at t = 8.3ms (half-sine), and 300A at t = 1.0ms-per absolute maximum ratings. This dual-pulse specification reflects real-world transient profiles: 8.3ms corresponds to 60Hz line frequency events, while 1.0ms covers fast-switching inverter spikes. The higher short-duration rating allows brief overloads without junction failure, supporting robust design in automotive DC-DC converters subject to load dump or inductive kickback. TUAS6MH's glass passivation enhances surge survivability versus non-passivated alternatives.