Taiwan Semiconductor Corporation HS2A

Overview

HS2A from Taiwan Semiconductor is a 2 A, 50 V repetitive peak reverse voltage (V_RRM) surface-mount fast recovery rectifier in DO-214AA (SMB) package, featuring 1.0 V max forward voltage at 2 A, 50 ns reverse recovery time, and glass passivated junction for reliability in switching power supplies.

For engineers reviewing the HS2A datasheet, HS2A pinout, HS2A application, or HS2A equivalent, key selection criteria include its 50 V V_RRM, 50 A surge rating, 80 °C/W junction-to-ambient thermal resistance, RoHS/halogen-free compliance, and suitability for high-efficiency SMPS and adapter designs requiring compact SMB footprint.

Technical Context

The HS2A is a single-die, unidirectional silicon rectifier optimized for fast switching with low conduction loss. Its 50 ns reverse recovery time and 1.0 V typical forward voltage at 2 A support high-frequency operation in DC-DC converters and offline SMPS front-end rectification stages.

Thermally, it operates from –55 °C to +150 °C junction temperature and uses matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. The DO-214AA (SMB) package provides UL 94V-0 flammability rating and polarity indication via cathode band.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.090 g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR220 and VS-2EYH01-M3/5AT, the HS2A offers optimal balance of low V_F, adequate 50 V V_RRM margin, and cost-effective SMB packaging for 24–48 V input SMPS and adapter applications where overvoltage headroom is constrained.

Availability

HS2A is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, and PCB-mounted SMPS requiring stable component supply, consistent DO-214AA (SMB) form factor, and RoHS-compliant fast recovery rectification.

Supply support for HS2A 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 rectifiers, TVS diodes, MOSFETs, and bipolar transistors.

The HS2A belongs to TSC's HS2x fast recovery rectifier family, engineered specifically for high-efficiency, surface-mount AC/DC and DC/DC power conversion in space-constrained consumer and industrial applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) rating for HS2A?

The HS2A has a maximum repetitive peak reverse voltage (V_RRM) of 50 V, as specified in the Absolute Maximum Ratings table. This value defines the highest reverse voltage the device can block repeatedly without breakdown. It is critical for selecting appropriate input voltage derating margins in rectifier applications-HS2A is intended for use in ≤50 V nominal systems such as 24 V or 48 V input SMPS and adapters.

Does HS2A have a specified reverse recovery time (t_rr) and how is it measured?

Yes, HS2A has a maximum reverse recovery time (t_rr) of 50 ns, tested under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter reflects the speed at which the diode transitions from conduction to blocking state, directly impacting switching losses and EMI in high-frequency power converters. The 50 ns t_rr makes HS2A suitable for operation up to ~1 MHz in well-designed layouts.

What package type and mounting method does HS2A use?

HS2A uses the DO-214AA (SMB) surface-mount package, with matte tin-plated leads compliant with J-STD-002 solderability standards. It is designed for reflow soldering on PCBs and supports automated pick-and-place assembly. Polarity is marked by a cathode band on the body, and the package meets UL 94V-0 flammability rating-making HS2A ideal for high-volume, space-constrained power designs.

Is HS2A RoHS and halogen-free compliant?

Yes, HS2A is RoHS compliant and halogen-free per IEC 61249-2-21. These certifications are explicitly stated in the Features section of the official datasheet. Compliance ensures HS2A meets environmental regulatory requirements for sale and use in the EU, China, and other major markets, and supports sustainable manufacturing practices without compromising electrical performance or reliability.

What is the junction-to-ambient thermal resistance (R_θJA) of HS2A and how should it be used in thermal design?

The junction-to-ambient thermal resistance (R_θJA) of HS2A is 80 °C/W, measured under standard JEDEC test conditions. Engineers use this value with the formula T_J = T_A + (P_LOSS × R_θJA) to estimate maximum junction temperature. For example, at 2 A and 1.0 V V_F, conduction loss is 2 W, so T_J rises 160 °C above ambient-requiring careful PCB copper area design or derating to stay within the +150 °C absolute maximum.