Taiwan Semiconductor Corporation HERA806G

Overview

HERA806G from Taiwan Semiconductor is an AEC-Q101-qualified, glass-passivated, single-die silicon rectifier in TO-220AC package, rated for 8 A average forward current, 600 V repetitive peak reverse voltage, and 150 A non-repetitive surge current - used in automotive DC-DC converters and industrial switching inverters.

For engineers reviewing the HERA806G datasheet, HERA806G pinout, HERA806G application, or HERA806G equivalent, key selection criteria include its 1.7 V max forward voltage at 8 A/25°C, 80 ns reverse recovery time, 55 pF junction capacitance, 2 °C/W junction-to-case thermal resistance, and compliance with JESD201 Class 2 whisker testing.

Technical Context

This device operates as a unidirectional power rectifier with fast recovery characteristics optimized for high-frequency switching topologies. Its 600 V V_RRM rating and 150 A I_FSM support robust operation under transient overloads in automotive-grade power supplies.

The HERA806G uses a glass-passivated junction to ensure stable leakage performance up to 125°C (400 µA max IR), while its low R_θJC of 2 °C/W enables efficient heat transfer to heatsinks in constrained thermal environments.

Key Specifications

Pinout & Package

TO-220AC package with 3-terminal configuration: Anode (lead 1), Cathode (lead 2), and case-connected tab (lead 3, electrically tied to cathode). Matte tin-plated leads meet J-STD-002 solderability; polarity marked on device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R06DJF and VS-8EWH06FN-M3, the HERA806G delivers superior thermal resistance (2 °C/W), tighter IR control at elevated temperature, and optimized t_rr/C_J balance for high-frequency automotive converters - making it the most suitable choice for AEC-Q101-compliant, thermally constrained rectification.

Availability

HERA806G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching inverters, and EV onboard charger rectification requiring stable component supply across multi-year production cycles.

Supply support for HERA806G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and computing markets since 1979.

The HERA806G belongs to TSC's AEC-Q101-qualified high-efficiency rectifier family, engineered specifically for high-reliability, high-current rectification in automotive power systems and industrial switching converters.

FAQ

What is the maximum junction temperature rating for HERA806G?

The HERA806G has a maximum junction temperature (T_J) of +150°C, validated across its full operating range from –55°C to +150°C. This rating is supported by its glass-passivated junction and TO-220AC package with 2 °C/W thermal resistance, enabling reliable operation in engine bay or enclosed industrial enclosures where ambient temperatures exceed 105°C. The HERA806G maintains specified electrical parameters up to this limit.

Is HERA806G pin-compatible with other devices in the HERA80xG series?

Yes, all HERA801G through HERA808G share identical TO-220AC packaging, pinout, and mechanical dimensions - including lead spacing, tab size, and mounting hole placement. The HERA806G uses the same Anode–Cathode–Tab configuration as the rest of the series, allowing drop-in substitution within the same voltage class when thermal and electrical margins permit. No PCB layout change is needed when upgrading within the family.

Does HERA806G require heatsinking in typical 8 A applications?

Yes, the HERA806G requires external heatsinking to maintain T_J ≤ 150°C at 8 A continuous current. With R_θJC = 2 °C/W and typical R_θCA > 10 °C/W for bare mounting, junction temperature exceeds rating without a heatsink. A 10–15 °C/W heatsink with thermal interface material keeps T_J below 125°C at full load and 40°C ambient - confirming necessity of heatsink design for sustained HERA806G operation.

What is the reverse recovery time specification for HERA806G and how is it measured?

The HERA806G has a maximum reverse recovery time (t_rr) of 80 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A using the test circuit in Figure 6 of the datasheet. This value reflects performance at 25°C and confirms suitability for 100–200 kHz switching frequencies. The HERA806G's t_rr is slower than HERA805G (50 ns) due to higher voltage-rated die construction, but remains competitive among 600 V fast recovery rectifiers.

How does the HERA806G differ from the AEC-Q101-qualified HERA806GH variant?

The HERA806G is the standard industrial-grade version, while HERA806GH adds full AEC-Q101 qualification including stress testing for temperature cycling, humidity bias, and high-temperature operating life. Both share identical electrical specs, TO-220AC package, and marking code "HERA806G", but only HERA806GH carries the "H" suffix and is certified for automotive powertrain applications. HERA806G remains suitable for industrial and commercial use where AEC-Q101 is not mandated.