Taiwan Semiconductor Corporation HER203GH

Overview

HER203GH from Taiwan Semiconductor is a high-efficiency, AEC-Q101 qualified ultrafast recovery rectifier diode in DO-204AC (DO-15) package, rated for 200 V repetitive peak reverse voltage, 2 A average forward current, and 60 A non-repetitive surge current - used in automotive DC-DC converters and switching-mode power supplies.

For engineers reviewing the HER203GH datasheet, HER203GH pinout, HER203GH application, or HER203GH equivalent, key selection criteria include its 50 ns reverse recovery time, 1.0 V max forward voltage at 2 A, 5 µA max reverse leakage at 25°C, DO-15 mechanical compatibility, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This single-die, glass-passivated junction rectifier operates with ultrafast recovery (trr ≤ 50 ns) to minimize switching losses in high-frequency SMPS topologies. Its low VF (≤1.0 V @ 2 A, 25°C) and low junction capacitance (35 pF @ 1 MHz, 4 V) support efficient operation in 100–500 kHz converter stages.

The device features pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and is rated for junction temperatures from –55°C to +150°C - enabling use in under-hood automotive environments where thermal robustness is critical.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, glass-passivated die, cathode indicated by band. Weight ≈ 0.400 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R02U and ES2D-E3/57T, HER203GH uniquely balances AEC-Q101 qualification, DO-15 footprint, 50 ns trr, and 1.0 V VF - making it optimal for automotive-grade, space-constrained, medium-frequency rectification where reliability and thermal margin are prioritized over marginal speed gains.

Availability

HER203GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching mode power supplies, and freewheeling applications requiring stable component supply, AEC-Q101 compliance, and DO-15 through-hole manufacturability.

Supply support for HER203GH 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 HER20xG series is part of TSC's high-reliability rectifier product line, engineered specifically for automotive-grade power conversion where AEC-Q101 validation, thermal stability, and ultrafast switching performance are mandatory.

FAQ

What is the maximum junction temperature rating for HER203GH?

The HER203GH has a maximum junction temperature (TJ MAX) of +150°C, verified per AEC-Q101 stress testing. This rating allows reliable operation in under-hood automotive environments and high-ambient industrial settings. Derating curves in the datasheet define safe operating current versus ambient temperature - for example, at 100°C ambient, the average forward current must be reduced to approximately 1.3 A to maintain TJ ≤ 150°C. HER203GH maintains specified electrical parameters within this thermal envelope.

Is HER203GH pin-compatible with other DO-15 rectifiers like 1N4007?

HER203GH uses the standard DO-204AC (DO-15) package with axial leads and cathode band marking, matching the physical footprint and soldering pattern of 1N4007 and similar DO-15 diodes. However, it is not functionally interchangeable: HER203GH is an ultrafast rectifier (trr ≤ 50 ns), whereas 1N4007 is a general-purpose rectifier (trr > 2 µs). Substituting HER203GH for 1N4007 improves switching efficiency but requires verifying layout thermal relief and circuit timing margins.

Does HER203GH require a heatsink in typical 2 A applications?

HER203GH does not require an external heatsink in typical 2 A, 25°C ambient applications when mounted on a standard 1-inch² copper pad (2 oz Cu) with thermal vias, due to its RθJA of 60°C/W and low VF (≤1.0 V). At 2 A, power dissipation is ≤2.0 W, resulting in ~120°C junction rise - within the 150°C limit. For sustained 2 A operation above 60°C ambient or in enclosed enclosures, additional copper area or airflow is recommended. HER203GH's DO-15 package is optimized for natural-convection thermal performance.

What does the "H" suffix in HER203GH signify?

The "H" suffix in HER203GH explicitly denotes AEC-Q101 qualification - meaning the device has passed the full suite of stress tests defined in the AEC-Q101 standard for discrete semiconductors, including HTGB, HTRB, AC/DC life test, temperature cycling, and mechanical shock. This distinguishes HER203GH from the non-qualified HER203G variant and confirms suitability for automotive powertrain, chassis, and body electronics applications where zero-defect reliability is mandated.

How does HER203GH compare to HER203G in terms of electrical specs and reliability?

HER203GH and HER203G share identical absolute maximum ratings, electrical specifications (VRRM = 200 V, IF = 2 A, trr ≤ 50 ns, VF ≤ 1.0 V), and DO-15 packaging. The sole difference is AEC-Q101 qualification: HER203GH undergoes additional screening and lot-level stress testing per automotive standards, while HER203G is intended for commercial/industrial use. Both parts are manufactured on the same wafer process and assembly line - HER203GH adds qualification traceability and test documentation, not electrical differentiation. HER203GH is the preferred choice for automotive BOMs.