Taiwan Semiconductor Corporation HER1002GH

Overview

HER1002GH from Taiwan Semiconductor is a 10A, 100V AEC-Q101-qualified high-efficiency rectifier diode in TO-220AB package, featuring 1.0V forward voltage at 5A/25°C, 125A surge rating, and 50ns reverse recovery time. It serves as a primary output rectifier in automotive DC-DC converters requiring robust thermal performance and low conduction loss.

For engineers reviewing the HER1002GH datasheet, HER1002GH pinout, HER1002GH application, or HER1002GH equivalent, key selection criteria include its 100V V_RRM, dual-die TO-220AB construction, AEC-Q101 qualification, junction-to-case thermal resistance of 1.5°C/W, and suitability for freewheeling and switching-mode power supply designs.

Technical Context

This device is a single-phase, dual-die silicon rectifier optimized for high-frequency switching applications. Its 50ns reverse recovery time and low 1.0V forward voltage directly reduce switching losses and conduction losses in 100kHz–500kHz SMPS topologies.

The TO-220AB package enables direct heatsink mounting with 0.56 N·m maximum torque, while the AEC-Q101 qualification confirms stress-tested reliability for automotive under-hood environments up to 150°C junction temperature.

Key Specifications

Pinout & Package

Package: TO-220AB - Insulated case with center tab (cathode), two outer leads (anode and cathode); matte tin-plated leads compliant with J-STD-002 solderability; UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH10R06DJF and MUR1020CT, the HER1002GH offers optimal balance of 100V rating, 1.0V V_F, 50ns t_rr, and AEC-Q101 compliance-making it the preferred choice for automotive 48V/12V DC-DC converters where efficiency, speed, and qualification are jointly critical.

Availability

HER1002GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching power supplies, and motor drive freewheeling circuits requiring stable component supply and AEC-Q101 assurance.

Supply support for HER1002GH 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, and protection components.

The HER100xG series was designed specifically for high-efficiency, high-reliability rectification in automotive and industrial switching power supplies-emphasizing low V_F, fast t_rr, and AEC-Q101 qualification across voltage grades.

FAQ

What is the maximum junction temperature rating for HER1002GH?

The HER1002GH 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 TO-220AB package with 1.5°C/W junction-to-case thermal resistance and AEC-Q101 qualification, making HER1002GH suitable for under-hood automotive applications where ambient temperatures exceed 105°C.

Is HER1002GH pin-compatible with standard TO-220AB rectifiers like 1N5408?

Yes, HER1002GH uses the standard TO-220AB outline with anode–cathode–cathode (A-K-K) pinout: left lead = anode, right lead = cathode, center tab = cathode. While electrically and mechanically compatible with legacy TO-220AB rectifiers, HER1002GH delivers superior performance-50ns t_rr and 1.0V V_F versus ~2μs t_rr and ~1.1V V_F for 1N5408-making HER1002GH a functional upgrade without PCB changes.

Does HER1002GH require heatsinking in a 10A continuous application?

Yes, HER1002GH requires external heatsinking at 10A continuous due to ~5W power dissipation (10A × 1.0V V_F). With R_θJC = 1.5°C/W and typical R_θCA ≈ 15°C/W for a modest heatsink, junction temperature rises ~170°C above ambient-exceeding the 150°C limit. A heatsink reducing total thermal resistance to ≤10°C/W keeps T_J within spec; HER1002GH's insulated tab simplifies mounting.

What does the "H" suffix in HER1002GH signify?

Per Taiwan Semiconductor's ordering information, the "H" suffix in HER1002GH explicitly denotes AEC-Q101 qualification. This means HER1002GH has undergone rigorous stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and unbiased highly accelerated stress test (UHAST)-to validate reliability for automotive electronic systems, distinguishing it from the non-H variant HER1002G.

How does HER1002GH's reverse recovery time compare to HER1005GH?

HER1002GH has a specified t_rr of 50ns (max), while HER1005GH is rated at 50ns for lower-voltage variants (HER1001G–HER1005G) and 80ns for higher-voltage variants (HER1006G–HER1008G). Since HER1002GH falls in the 100V group, its 50ns t_rr matches HER1005GH's lower-end specification-but HER1005GH's 400V V_RRM results in higher V_F (1.3V) and reduced efficiency at 100V-class applications. HER1002GH remains optimal for 100V systems.