Taiwan Semiconductor Corporation HER206G

Overview

HER206G from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode rated for 2 A average forward current and 600 V repetitive peak reverse voltage, with 1.7 V typical forward voltage at 2 A and 25°C, used in switching-mode power supplies and freewheeling paths where low conduction loss and fast recovery (75 ns) are critical.

For engineers reviewing the HER206G datasheet, HER206G pinout, HER206G application, or HER206G equivalent, key selection factors include its DO-204AC (DO-15) package, 60°C/W junction-to-ambient thermal resistance, 60 A surge capability, AEC-Q101 qualification option (HER206GH), and 20 pF junction capacitance at 1 MHz and 4 V reverse bias.

Technical Context

The HER206G is a single-die, standard-recovery rectifier optimized for high-frequency switching converters - not ultrafast or Schottky - with a reverse recovery time of 75 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A test conditions. Its 600 V VRRM rating targets mid-voltage industrial and automotive auxiliary power stages.

Thermally, it features a 60°C/W R_θJA in DO-204AC mounting, enabling 2 A continuous operation up to +75°C ambient without derating when PCB copper area is ≥1 cm². The device uses pure tin-plated leads compliant with J-STD-002 and passes JESD201 Class 2 whisker testing.

Key Specifications

Pinout & Package

HER206G is housed in a DO-204AC (DO-15) axial-leaded package with cathode indicated by a band on the body. 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 STTH2R06 and ES2J, the HER206G offers superior surge robustness (60 A vs. 50 A), lower cost in tape-and-reel, and proven reliability in high-humidity environments - making it optimal for cost-sensitive, thermally constrained, or automotive-qualified through-hole power stages.

Availability

HER206G is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and automotive auxiliary power supplies requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for HER206G 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 power semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in rectifiers, TVS diodes, MOSFETs, and LED drivers since 1979.

The HER201G–HER208G family was designed specifically for high-efficiency, medium-voltage AC–DC and DC–DC conversion in industrial and automotive systems - emphasizing ruggedness, thermal stability, and AEC-Q101 compliance readiness.

FAQ

What is the maximum junction temperature rating for HER206G?

The HER206G has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings. This allows operation in high-ambient environments such as engine control units or enclosed industrial power supplies. Derating begins above +75°C ambient, and the device must be mounted on sufficient copper area to maintain T_J ≤ 150°C under full 2 A load. HER206G's thermal resistance is 60°C/W junction-to-ambient.

Is HER206G pin-compatible with other parts in the HER201G–HER208G series?

Yes, all parts in the HER201G–HER208G series share identical DO-204AC (DO-15) packaging, lead spacing, polarity marking, and mechanical dimensions. HER206G can be substituted for HER205G or HER207G in existing layouts without modification - though electrical parameters (VRRM, VF, trr) differ per voltage grade. Always verify circuit voltage margin and thermal performance when swapping.

Does HER206G meet automotive qualification standards?

The base HER206G is not AEC-Q101 qualified, but the HER206GH variant - identical electrically and mechanically - is fully AEC-Q101 qualified per Rev G2105 documentation. HER206GH undergoes stress testing including temperature cycling, HTRB, and mechanical shock. For automotive designs, specify HER206GH; HER206G remains suitable for industrial and commercial applications.

What is the reverse recovery time (trr) of HER206G and how is it measured?

The HER206G has a typical reverse recovery time (trr) of 75 ns, measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, with 50% reference points on the recovery waveform. This value applies to HER206G, HER207G, and HER208G per the datasheet's electrical specifications table. It reflects behavior in hard-switched topologies, not resonant or ZVS circuits.

How does the junction capacitance of HER206G affect high-frequency design?

HER206G exhibits 20 pF typical junction capacitance (C_J) at 1 MHz and 4 V reverse bias - lower than HER201G–HER205G (35 pF) due to higher voltage-rated die construction. This reduced capacitance lowers capacitive coupling noise and eases snubber design in 100–500 kHz converters, but does not enable operation beyond 1 MHz due to its 75 ns trr limitation.