Taiwan Semiconductor Corporation HER301G A0G

Overview

HER301G from Taiwan Semiconductor is a high-efficiency, AEC-Q101-qualified ultrafast recovery rectifier diode in DO-201AD package, rated for 3 A average forward current, 50 V repetitive peak reverse voltage (V_RRM), and 125 A non-repetitive surge current (I_FSM). It delivers low forward voltage drop (1.0 V at 3 A, 25°C) and fast reverse recovery time (≤50 ns), enabling use in compact DC/DC converters and switching-mode power supplies.

For engineers reviewing the HER301G datasheet, HER301G pinout, HER301G application, or HER301G equivalent, key selection criteria include its 50 V V_RRM, 1.0 V V_F at rated current, 50 ns t_rr, DO-201AD mechanical compatibility, and AEC-Q101 qualification status for automotive-grade reliability.

Technical Context

The HER301G employs an epitaxial planar junction structure optimized for ultrafast recovery, achieving ≤50 ns reverse recovery time under I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A test conditions. Its 10 °C/W junction-to-lead thermal resistance supports efficient heat transfer in high-current PCB layouts.

Designed as a single-die, unidirectional device with cathode band polarity marking, it operates across –55°C to +150°C junction temperature range and exhibits 10 µA max reverse leakage at 25°C and 200 µA at 125°C - critical for stable freewheeling in thermally demanding environments.

Key Specifications

Pinout & Package

HER301G is housed in the industry-standard DO-201AD axial-leaded package with cathode indicated by a colored band. Leads are pure tin-plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06S and MUR305E, HER301G uniquely combines 50 V rating, DO-201AD form factor, ≤50 ns recovery, and AEC-Q101 qualification - making it the only option meeting all three constraints for cost-sensitive, space-limited automotive auxiliary supplies.

Availability

HER301G is available at Aetrix Electronics and suitable for DC/DC converter output rectification, automotive body control module (BCM) power supplies, and industrial switch-mode inverter auxiliary supplies requiring stable component supply and long-term manufacturability.

Supply support for HER301G 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, TVS diodes, and MOSFETs for industrial and automotive markets.

The HER301G belongs to TSC's high-efficiency ultrafast rectifier family, engineered specifically for high-frequency switching power conversion where low V_F, fast t_rr, and AEC-Q101 reliability are jointly required.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for HER301G?

The HER301G has a V_RRM rating of 50 V, meaning it can reliably block up to 50 V of reverse voltage in repetitive operation. This value is fixed for the HER301G variant and distinguishes it from higher-voltage members of the HER30xG family such as HER302G (100 V) and HER308G (1000 V). Exceeding 50 V risks avalanche breakdown and permanent damage to the HER301G.

Is HER301G qualified for automotive applications?

Yes, HER301G is AEC-Q101 qualified, confirming it meets the stress-test requirements for automotive discrete semiconductors including temperature cycling, humidity bias, and mechanical shock. This qualification applies to the standard HER301G part number - no "H" suffix is required, unlike some other members of the family (e.g., HER301GH denotes enhanced qualification level). The HER301G is suitable for under-hood and cabin power modules.

What is the forward voltage drop (V_F) of HER301G at rated current?

The HER301G exhibits a typical forward voltage drop of 1.0 V at 3 A forward current and 25°C junction temperature, measured under pulse conditions (PW = 0.3 ms). This low V_F contributes directly to reduced conduction losses - for example, 3.0 W dissipation at full load - supporting thermally constrained PCB layouts without forced air cooling in the HER301G implementation.

Does HER301G have a specified reverse recovery time (t_rr)?

Yes, HER301G has a maximum reverse recovery time of 50 ns, tested under I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A conditions. This ultrafast t_rr is confirmed for the entire HER301G–HER305G subgroup and is essential for minimizing switching losses in high-frequency (>100 kHz) power converters where the HER301G is commonly deployed.

What package type does HER301G use, and what are its key mechanical features?

HER301G uses the DO-201AD axial-leaded package, featuring pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability-rated epoxy molding compound, and cathode polarity marked by a visible band. Its 1.10 g mass and standardized lead spacing support automated through-hole assembly and thermal coupling to copper pours - key attributes for reliable HER301G integration in production-grade power boards.