Taiwan Semiconductor Corporation HER202G

Overview

HER202G from Taiwan Semiconductor is a 2A, 100V high-efficiency glass-passivated fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 1.0V max forward voltage at 2A/25°C, 60A surge rating, and 50ns reverse recovery time - deployed in DC-DC converters and switching-mode power supplies.

For engineers reviewing the HER202G datasheet, HER202G pinout, HER202G application, or HER202G equivalent, key selection criteria include V_RRM = 100V, I_F = 2A, t_rr = 50ns, thermal resistance R_θJA = 60°C/W, and AEC-Q101 qualification availability - all critical for automotive-grade power conversion designs.

Technical Context

The HER202G uses a single-die, glass-passivated PN junction optimized for fast recovery (t_rr ≤ 50ns) and low conduction loss (V_F ≤ 1.0V @ 2A), enabling high-frequency switching operation in SMPS topologies. Its DO-204AC package supports lead-free soldering per J-STD-002 and meets UL 94V-0 flammability.

Thermal performance is defined by R_θJA = 60°C/W and T_J(max) = 150°C, with reverse leakage limited to 5µA @ 25°C and 150µA @ 125°C - ensuring stable operation under elevated ambient conditions in compact power stages.

Key Specifications

Pinout & Package

HER202G is housed in a DO-204AC (DO-15) axial-leaded package with cathode indicated by a band. Leads are pure tin-plated and solderable per J-STD-002. Polarity is unidirectional: anode and cathode terminals only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R010DJF and ES2D, the HER202G offers axial-leaded DO-15 compatibility, 60A surge capability, and AEC-Q101 qualification path - making it preferred for through-hole automotive and industrial power supply upgrades requiring proven thermal robustness and legacy footprint retention.

Availability

HER202G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for HER202G 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 global industrial, automotive, and consumer markets since 1979.

The HER20xG series was designed specifically for high-efficiency, high-reliability rectification in switching power supplies - emphasizing fast recovery, low V_F, and rugged packaging for demanding thermal and mechanical environments.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of HER202G?

The HER202G has a V_RRM rating of 100 V, meaning it can safely block up to 100 volts of reverse-biased voltage in repetitive operation. This value is fixed per the device's marking and datasheet specification - HER202G is distinct from HER201G (50V) and HER203G (200V) in this parameter. Exceeding 100 V risks avalanche breakdown and permanent damage to the HER202G.

Does HER202G have AEC-Q101 qualification?

The base HER202G is not AEC-Q101 qualified, but the variant HER202GH is fully AEC-Q101 qualified and shares identical electrical specs and DO-204AC packaging. HER202GH undergoes extended stress testing including temperature cycling, HTSL, and biased HAST - making it suitable for automotive body electronics where HER202G alone would not meet qualification requirements.

What is the forward voltage (V_F) of HER202G at rated current?

The HER202G exhibits a maximum forward voltage of 1.0 V at I_F = 2 A and T_J = 25°C, measured under pulsed conditions (PW = 0.3 ms). At elevated junction temperatures (e.g., 125°C), V_F decreases slightly due to semiconductor physics, but system-level design should use the 1.0 V max value for worst-case power loss calculation in the HER202G.

What package type does HER202G use, and are its leads lead-free?

HER202G uses the DO-204AC (DO-15) axial-leaded package with pure tin-plated leads compliant with J-STD-002 for solderability. The molding compound meets UL 94V-0 flammability rating, and the device is RoHS-compliant and halogen-free per IEC 61249-2-21 - confirming full lead-free and green material compliance for HER202G.

How does HER202G compare to HER203G in terms of reverse voltage and application suitability?

HER202G (100V V_RRM) is rated for lower reverse voltage than HER203G (200V V_RRM), making HER202G appropriate for 12–48V input systems, while HER203G suits 48–110V applications. Both share identical I_F = 2A, t_rr = 50ns, and DO-15 packaging - so HER202G should not be substituted into circuits where reverse voltage exceeds 100V, even if HER203G fits the same footprint.