Taiwan Semiconductor Corporation HER602GH

Overview

HER602GH from Taiwan Semiconductor is a high-efficiency, AEC-Q101-qualified glass-passivated silicon rectifier diode in R-6 package, rated for 6 A average forward current, 100 V repetitive peak reverse voltage, and 150 A surge current. It delivers low forward voltage (1.0 V at 6 A, 25°C), low reverse leakage (10 µA at 25°C), and fast recovery time (50 ns), making it suitable for automotive-grade DC/DC converters and switching-mode power supplies.

For engineers reviewing the HER602GH datasheet, HER602GH pinout, HER602GH application, or HER602GH equivalent, key selection factors include its AEC-Q101 qualification, R-6 package thermal resistance (37 °C/W), 100 V V_RRM, 1.0 V V_F at full load, and 50 ns reverse recovery time in high-frequency switching topologies.

Technical Context

This device is a single-die, unidirectional, planar-junction silicon rectifier optimized for high-efficiency AC/DC and DC/DC conversion. Its glass passivation ensures stable junction performance under thermal cycling and humidity stress, while the pure tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

The HER602GH operates across -55°C to +150°C junction temperature range and exhibits low junction capacitance (80 pF at 4 V, 1 MHz), supporting stable high-frequency operation in flyback and forward converter freewheeling paths without excessive capacitive loss or ringing.

Key Specifications

Pinout & Package

Package: R-6 axial leaded, molded epoxy case meeting UL 94V-0; cathode indicated by band; weight ≈1.65 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH6L06S and MUR620CT, the HER602GH offers the only AEC-Q101-qualified, R-6 packaged option at 100 V with lowest V_F (1.0 V) - critical for thermally constrained automotive DC/DC where board area and junction temperature margin are limiting factors.

Availability

HER602GH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switching-mode power supplies, and renewable energy bypass applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for HER602GH 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 HER60xG series targets high-reliability rectification in harsh-environment power conversion, with the HER602GH specifically engineered for 100 V-class automotive and industrial SMPS where AEC-Q101 validation, low conduction loss, and fast recovery are mandatory.

FAQ

What is the maximum junction temperature rating for HER602GH?

The HER602GH has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet (Version H2104). This rating applies across the full operating range and supports reliable operation in under-hood automotive environments and sealed industrial enclosures where ambient temperatures exceed 85°C. The HER602GH must be mounted with adequate thermal relief to avoid exceeding this limit during 6 A continuous conduction.

Is HER602GH pin-compatible with other HER60xG variants?

Yes, all HER60xG devices-including HER602GH-share identical R-6 package dimensions, lead spacing, and anode/cathode pinout. The only differences are V_RRM (100 V for HER602GH vs. 50–600 V for others) and corresponding electrical parameters like V_F and t_rr. Therefore, HER602GH can be substituted within the same family for 100 V applications without PCB layout changes, provided thermal and surge margins remain sufficient.

Does HER602GH require a heatsink in standard operation?

HER602GH does not require an external heatsink for 6 A continuous operation at 25°C ambient if mounted on ≥1 in² of 2-oz copper with thermal vias, given its R_θJA of 37 °C/W. At 6 A and 1.0 V V_F, power dissipation is ~6 W; this yields ~222°C rise above ambient - exceeding T_JMAX. Thus, a minimal heatsink or enhanced PCB copper is mandatory. Derating curves in the datasheet confirm ≤3.5 A is sustainable without added thermal mass at 70°C ambient.

What does the 'H' suffix in HER602GH signify?

The 'H' suffix in HER602GH explicitly denotes AEC-Q101 qualification per the Taiwan Semiconductor ordering information table (Version H2104). This means the HER602GH has undergone full stress testing-including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST)-and meets automotive electronic component reliability standards. Non-H variants (e.g., HER602G) lack this qualification and are intended for commercial/industrial use only.

How does HER602GH compare to standard 1N540x rectifiers in switching applications?

HER602GH outperforms legacy 1N540x rectifiers in switching applications due to its 50 ns reverse recovery time (vs. >2 µs for 1N5408), 1.0 V forward voltage (vs. ~1.2 V), and AEC-Q101 qualification. These attributes reduce switching loss, improve efficiency above 50 kHz, and enable reliable operation in automotive-grade SMPS where 1N540x devices would overheat or fail prematurely. The HER602GH's glass passivation also provides superior long-term stability versus epoxy-passivated 1N540x parts.