Taiwan Semiconductor Corporation ESH2DH

Overview

ESH2DH from Taiwan Semiconductor is a 2 A, 200 V ultra-fast recovery surface-mount rectifier diode in DO-214AA (SMB) package, featuring 20 ns reverse recovery time, 0.9 V max forward voltage at 2 A, and AEC-Q101 qualification for automotive-grade reliability-used in DC-DC converter freewheeling paths and snubber circuits.

For engineers reviewing the ESH2DH datasheet, ESH2DH pinout, ESH2DH application, or ESH2DH equivalent, key selection criteria include peak reverse voltage rating (200 V), ultra-fast trr (≤20 ns), thermal resistance (R_θJL = 20 °C/W), AEC-Q101 compliance, and DO-214AA mechanical compatibility with automated SMT assembly.

Technical Context

The ESH2DH operates as a single-die, unidirectional silicon rectifier with glass-passivated junction for enhanced moisture resistance and long-term stability under thermal cycling. Its ultra-fast recovery enables high-frequency switching (>100 kHz) in flyback and forward converters without excessive switching loss.

Designed for automotive environments, the device supports junction temperatures up to +175 °C and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity-critical for reflow-soldered power stages in engine control units and LED lighting modules.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), molded plastic case with matte tin-plated leads, cathode indicated by band, UL 94V-0 rated compound, weight ≈0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-2EYH02-M3/54 and MUR220RLG, the ESH2DH delivers superior high-frequency efficiency via its 20 ns t_rr and maintains automotive-grade reliability through AEC-Q101 validation and glass passivation-making it the preferred choice for space-constrained, thermally aggressive, and safety-critical vehicle subsystems.

Availability

ESH2DH is available at Aetrix Electronics and suitable for DC-DC converters, automotive LED lighting systems, and snubber networks requiring stable component supply with guaranteed automotive-grade traceability.

Supply support for ESH2DH 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 automotive, industrial, and consumer markets since 1979.

The ESH2DH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in automotive electrification and ADAS subsystems.

FAQ

What is the maximum repetitive peak reverse voltage rating for ESH2DH?

The ESH2DH has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, verified per Taiwan Semiconductor's A2102 datasheet. This rating defines the highest reverse voltage the diode can block continuously without breakdown. It is critical for selecting ESH2DH in applications like 48 V automotive DC-DC converters where load dump transients may exceed 150 V. The ESH2DH maintains this rating across its full operating temperature range (–55°C to +175°C).

Is ESH2DH qualified for automotive applications?

Yes, the ESH2DH is AEC-Q101 qualified per Taiwan Semiconductor's official documentation. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated temperature-humidity bias (HAST). The ESH2DH also meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity-making it suitable for engine control units, body electronics, and ADAS modules where long-term reliability under thermal and mechanical stress is mandatory.

What is the reverse recovery time (t_rr) of ESH2DH and why does it matter?

The ESH2DH has a maximum reverse recovery time (t_rr) of 20 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This ultra-fast value directly reduces switching losses and EMI in high-frequency power converters (e.g., >200 kHz DC-DC stages). In comparison, standard fast rectifiers often exceed 50 ns. Using ESH2DH instead lowers Q_rr and improves system efficiency-especially critical in thermally constrained automotive applications where heat dissipation margins are tight.

Which package does ESH2DH use and what are its assembly implications?

The ESH2DH uses the DO-214AA (SMB) surface-mount package, with matte tin-plated leads compliant with J-STD-002 solderability standards. Its low-profile design supports automated placement and reflow soldering at peak temperatures up to 260°C. The package's R_θJL = 20 °C/W allows efficient heat transfer to PCB copper pours-eliminating need for external heatsinks in 2 A applications. Polarity is marked by a cathode band, ensuring correct orientation during SMT assembly.

How does ESH2DH compare to ESH2BH and ESH2CH in terms of voltage rating?

The ESH2DH is the 200 V variant in Taiwan Semiconductor's ESH2xH series, whereas ESH2BH is rated for 100 V and ESH2CH for 150 V. All three share identical package (DO-214AA), current rating (2 A), thermal specs (R_θJL = 20 °C/W), and AEC-Q101 qualification-but differ only in V_RRM and corresponding VR(RMS) values. The marking code "ESH2D" on the device body identifies the ESH2DH version. Engineers must select based on system-level reverse voltage stress, not interchangeably.