Taiwan Semiconductor Corporation ESH2B

Overview

ESH2B from Taiwan Semiconductor is a 2 A, 100 V ultra-fast surface-mount rectifier diode in DO-214AA (SMB) package, featuring 20 ns reverse recovery time, 0.9 V forward voltage at 2 A, and 60 A surge capability-designed for high-frequency switching in compact AC/DC adapters.

For engineers reviewing the ESH2B datasheet, ESH2B pinout, ESH2B application, or ESH2B equivalent, key selection criteria include repetitive peak reverse voltage (100 V), thermal resistance (R_θJA = 75 °C/W), junction temperature range (–55 to +175 °C), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The ESH2B is a single-die, glass-passivated silicon PN junction rectifier optimized for high-efficiency SMPS operation. Its ultra-fast recovery (trr ≤ 20 ns) minimizes switching losses during high-frequency transitions, while the DO-214AA (SMB) package supports automated placement and meets J-STD-020 moisture sensitivity level 1.

Electrical behavior is characterized by low forward voltage (VF ≤ 0.9 V @ 2 A, 25 °C), tight reverse leakage (IR ≤ 2 µA @ 25 °C, rated VR), and stable junction capacitance (CJ = 25 pF @ 1 MHz, 4 V). Thermal performance is defined by R_θJL = 20 °C/W and R_θJA = 75 °C/W under standard mounting conditions.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, low-profile plastic case with matte tin-plated leads; polarity indicated by cathode band.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Compared with STTH2R01 and ES1J, the ESH2B delivers superior high-frequency rectification efficiency via its 20 ns trr and 0.9 V VF, while maintaining full compatibility with DO-214AA footprint and assembly processes-making it optimal for space-constrained, thermally demanding 2 A adapter and lighting designs.

Availability

ESH2B is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, and industrial SMPS requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.

Supply support for ESH2B 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 power, industrial, and consumer markets since 1979.

The ESH2B belongs to TSC's ESH2x ultra-fast rectifier family, engineered specifically for high-efficiency, high-density AC/DC and DC/DC power conversion where low VF, fast trr, and robust surge capability are critical.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the ESH2B?

The ESH2B has a maximum repetitive peak reverse voltage (V_RRM) of 100 V. This rating defines the highest continuous reverse voltage the device can block without breakdown under normal operating conditions. It is strictly specified per the official Taiwan Semiconductor datasheet (Version J2102) and distinguishes ESH2B from ESH2C (150 V) and ESH2D (200 V). Designers must ensure circuit peak reverse stress remains below 100 V for reliable long-term operation of the ESH2B.

Does the ESH2B support automated SMT assembly?

Yes, the ESH2B supports automated surface-mount assembly. Its DO-214AA (SMB) package features matte tin-plated leads compliant with J-STD-002 solderability standards and is rated moisture sensitivity level 1 per J-STD-020-meaning no pre-baking is required before reflow. The low-profile construction and standardized footprint enable reliable pick-and-place handling and consistent solder joint formation in high-volume manufacturing of power supplies and adapters using the ESH2B.

What is the typical forward voltage (V_F) of the ESH2B at rated current?

The ESH2B exhibits a maximum forward voltage (V_F) of 0.9 V at 2 A and 25 °C, per the manufacturer's electrical specifications. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss under nominal load. At elevated junction temperatures (e.g., 125 °C), V_F decreases slightly, but system-level thermal design must still account for worst-case 0.9 V drop to calculate power dissipation and ensure safe operation of the ESH2B.

Can the ESH2B replace a standard FR107 rectifier in an existing design?

No, the ESH2B is not a direct replacement for FR107. While both are DO-214AA devices, FR107 is rated 1 A / 1000 V with trr ≈ 500 ns-optimized for high-voltage, low-frequency applications. The ESH2B is rated 2 A / 100 V with trr ≤ 20 ns, targeting high-frequency, high-current rectification. Substituting ESH2B for FR107 risks reverse voltage overstress; substituting FR107 for ESH2B causes excessive conduction loss and thermal failure. Always verify voltage, current, and speed requirements before interchanging rectifiers like the ESH2B.

Is the ESH2B halogen-free and RoHS compliant?

Yes, the ESH2B is both RoHS compliant and halogen-free in accordance with IEC 61249-2-21. This is explicitly stated in the manufacturer's documentation (Version J2102) under FEATURES and confirmed in the MECHANICAL DATA section. The molding compound and plating meet environmental regulatory requirements for sale in EU, China, and other regulated markets-ensuring full compliance for end products incorporating the ESH2B without requiring additional material declarations or exemptions.