Taiwan Semiconductor Corporation HS2A R5G

Overview

HS2A R5G from Taiwan Semiconductor is a 2 A, 50 V high-efficiency surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring 1.0 V max forward voltage at 2 A, 50 ns reverse recovery time, and 5 µA max reverse leakage at 25°C. It serves as a primary output rectifier in compact AC/DC adapters and low-voltage SMPS.

For engineers reviewing the HS2A R5G datasheet, HS2A R5G pinout, HS2A R5G application, or HS2A R5G equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal resistance (80 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for consumer power designs.

Technical Context

This single-die, glass-passivated standard recovery rectifier operates with fast switching characteristics enabled by optimized PN junction design and low stored charge. Its 50 ns trr and 1.0 V VF support high-frequency operation up to 100 kHz in flyback and forward converters without significant conduction or switching loss penalties.

The DO-214AA (SMB) package provides robust thermal performance (R_θJA = 80 °C/W) and matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance, enabling reliable reflow assembly in automated SMT lines.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, cathode indicated by band. 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 rectifier applications.

Compared with MUR220G and SB250, the HS2A R5G delivers optimal balance of low V_F, fast t_rr, and strict RoHS/halogen-free compliance-making it ideal for space-constrained, high-efficiency 50 V adapter and lighting designs where thermal and environmental specs are tightly constrained.

Availability

HS2A R5G is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, and USB-C power delivery systems requiring stable component supply, consistent parametric performance, and full environmental compliance.

Supply support for HS2A R5G 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, and MOSFETs since 1979.

The HS2A R5G belongs to TSC's HS2x high-efficiency rectifier family, engineered specifically for high-frequency, low-loss AC/DC conversion in consumer and industrial power supplies where thermal density and regulatory compliance are critical.

FAQ

What is the maximum junction temperature rating for HS2A R5G?

The HS2A R5G has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This wide operating range allows reliable use in enclosed LED drivers and industrial DC-DC modules where ambient temperatures exceed 70°C. The device's thermal resistance (R_θJA = 80 °C/W) means it can dissipate up to 1.25 W on a standard 2-layer PCB before reaching its 150°C limit. Always verify board-level thermal design using the HS2A R5G derating curve in Figure 1 of the official datasheet.

Is HS2A R5G suitable as a replacement for MUR220 in a 12 V adapter design?

HS2A R5G is not a direct replacement for MUR220 due to its lower V_RRM (50 V vs. 200 V); using it in a circuit designed for 200 V reverse stress risks catastrophic failure. However, in a properly designed 12 V adapter where peak reverse voltage stays below 40 V, HS2A R5G offers lower V_F (1.0 V vs. 1.15 V) and comparable t_rr (50 ns vs. 35 ns), improving light-load efficiency. Confirm actual reverse voltage waveform before substituting HS2A R5G.

Does HS2A R5G meet halogen-free requirements per IEC 61249-2-21?

Yes, HS2A R5G is certified halogen-free in accordance with IEC 61249-2-21 and fully RoHS compliant. The molding compound contains no chlorine, bromine, or other halogen elements above threshold limits, making it suitable for consumer electronics sold in EU, Japan, and South Korea. This compliance is verified in TSC's material declaration report for HS2A R5G and applies to all units shipped under this part number.

What is the surge current rating of HS2A R5G and how is it tested?

The HS2A R5G has a non-repetitive peak forward surge current (I_FSM) rating of 50 A, measured under an 8.3 ms single half-sine wave condition superimposed on rated DC load. This rating ensures robustness during cold-start inrush events in AC/DC adapters and lighting drivers. The test method follows IEC 61000-4-5 guidelines, and the value is validated across production lots per TSC's qualification testing protocol for HS2A R5G.

How does the reverse recovery time of HS2A R5G impact EMI in a 100 kHz flyback converter?

With a t_rr of ≤50 ns, HS2A R5G limits high-frequency ringing during diode turn-off, reducing common-mode EMI generation in 100 kHz flyback converters. Faster recovery minimizes the time during which reverse recovery current flows through parasitic PCB inductance, lowering dv/dt-induced noise. Measured EMI data in TSC's HS2A R5G application note shows 6–8 dB improvement in 30–100 MHz band versus 100 ns rectifiers-directly easing CISPR-32 Class B compliance in compact adapters.