Taiwan Semiconductor Corporation HER203G R0G

Overview

HER203G from Taiwan Semiconductor is a 2A, 200V high-efficiency glass-passivated fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 1.0V forward voltage at 2A/25°C, 50ns reverse recovery time, and 60A surge capability - used in DC-DC converters and switching-mode inverters.

For engineers reviewing the HER203G datasheet, HER203G pinout, HER203G application, or HER203G equivalent, key selection criteria include V_RRM = 200V, I_F = 2A, t_rr = 50ns, V_F = 1.0V, and DO-204AC mechanical compatibility in power conversion designs.

Technical Context

This single-die, axial-leaded rectifier uses glass passivation for junction reliability and achieves low conduction loss via optimized silicon structure. Its 50ns recovery time enables operation in medium-frequency switching topologies up to ~100 kHz without excessive switching loss.

The device operates across -55°C to +150°C junction temperature range with 60°C/W junction-to-ambient thermal resistance. It supports repetitive 200V reverse blocking and withstands non-repetitive 60A surge currents per 8.3ms half-sine waveform.

Key Specifications

Pinout & Package

HER203G is housed in DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R02 and ES2D, HER203G offers balanced trade-offs: moderate speed (50ns), lowest V_F among through-hole alternatives, and proven DO-204AC mechanical fit for serviceable, high-reliability power supplies.

Availability

HER203G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial AC-DC adapters requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for HER203G 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 industrial, computing, and consumer markets since 1979.

The HER20xG series targets cost-effective, high-reliability power conversion - designed specifically for medium-frequency switching applications where efficiency, surge robustness, and thermal stability outweigh ultra-fast timing demands.

FAQ

What is the maximum junction temperature rating for HER203G?

The HER203G has a maximum junction temperature (T_J) rating of +150°C, with operational range from -55°C to +150°C. This allows reliable use in enclosed industrial enclosures or near heat-generating components when thermal design respects the 60°C/W R_θJA limit. Derating curves in the HER203G datasheet define safe current limits at elevated ambient temperatures.

Is HER203G RoHS and halogen-free compliant?

Yes, HER203G is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and leads are pure tin plated - fully compatible with lead-free reflow and wave soldering processes per J-STD-002. Compliance documentation is available upon request from Taiwan Semiconductor.

Does HER203G have AEC-Q101 qualification?

The base HER203G part is not AEC-Q101 qualified; however, the variant HER203GH (with 'H' suffix) is explicitly qualified per AEC-Q101. For automotive applications requiring stress-tested reliability, HER203GH must be specified - it shares identical electrical parameters and DO-204AC packaging but undergoes additional qualification testing.

What is the reverse leakage current of HER203G at 125°C?

At T_J = 125°C and rated reverse voltage (200V), HER203G exhibits a maximum reverse leakage current (I_R) of 150 µA. At 25°C, the typical value is ≤5 µA. This low leakage supports stable operation in high-impedance feedback networks and minimizes standby power loss in energy-sensitive designs using HER203G.

Can HER203G replace HER202G or HER204G in existing designs?

HER203G can replace HER202G (100V) only if 200V V_RRM margin is acceptable; it cannot replace HER204G (300V) in circuits requiring ≥250V reverse blocking. Forward characteristics (V_F, t_rr) are identical across HER202G–HER204G, so thermal and dynamic behavior remains consistent - but voltage rating mismatch may compromise safety or reliability.