Taiwan Semiconductor Corporation HS2DAL

Overview

HS2DAL from Taiwan Semiconductor is a 2 A, 200 V glass-passivated surface-mount rectifier in Thin SMA package, featuring 0.87 V forward voltage at 2 A/25°C, 50 ns reverse recovery time, and 32 pF junction capacitance - optimized for DC-DC converters and switching-mode inverters.

For engineers reviewing the HS2DAL datasheet, HS2DAL pinout, HS2DAL application, or HS2DAL equivalent, key selection criteria include its 200 V repetitive peak reverse voltage, 60 A surge current rating, 17 °C/W junction-to-lead thermal resistance, low-profile Thin SMA footprint, and J-STD-020 Level 1 moisture sensitivity.

Technical Context

The HS2DAL is a single-die, fast-recovery silicon rectifier with glass-passivated junction for enhanced reliability and stable high-temperature operation up to 150 °C. Its 50 ns trr and low VF support high-frequency switching in compact power supplies.

Thermal performance is characterized on a 5 mm × 5 mm copper pad PCB: RθJL = 17 °C/W enables efficient heat transfer to the PCB lead frame, while RθJA = 53 °C/W reflects ambient-limited dissipation in standard SMT layouts.

Key Specifications

Pinout & Package

Package: Thin SMA - low-profile surface-mount package with matte tin-plated leads, UL 94V-0 molding compound, cathode band polarity marking, and 0.029 g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR220 and VS-2EY20, the HS2DAL offers the lowest VF (0.87 V) and thinnest profile (Thin SMA), making it optimal for space-constrained, high-efficiency 100–300 kHz converters - though its 50 ns trr sits between the two alternatives' extremes.

Availability

HS2DAL is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle availability.

Supply support for HS2DAL 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 Taiwanese manufacturer specializing in discrete semiconductors, including rectifiers, TVS diodes, MOSFETs, and bipolar transistors.

The HS2DAL belongs to TSC's HS2xAL high-efficiency rectifier family, designed specifically for high-frequency, surface-mount power conversion where low VF, fast trr, and thermal robustness are critical.

FAQ

What is the maximum junction temperature rating for HS2DAL?

The HS2DAL has a maximum junction temperature (TJ MAX) of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating allows reliable operation in enclosed industrial power supplies and automotive under-hood auxiliary converters. Derating curves confirm 2 A continuous current is maintainable up to 125 °C ambient when mounted on a 5 mm × 5 mm Cu pad. The HS2DAL must not exceed this limit to avoid permanent degradation of the glass-passivated junction.

Does HS2DAL have a cathode band marking, and how is polarity identified?

Yes, the HS2DAL uses a visible cathode band marking on the device body to indicate polarity, consistent with JEDEC-standard Thin SMA orientation. The banded end corresponds to the cathode terminal, which must be connected toward the positive output rail in rectifier configurations. This marking is laser-etched and remains legible after reflow soldering. Polarity verification is essential before PCB layout - incorrect placement causes open-circuit failure in forward conduction mode. The HS2DAL datasheet confirms this marking scheme in the mechanical outline section.

What is the surge current capability of HS2DAL, and under what conditions is it specified?

The HS2DAL supports a peak non-repetitive forward surge current (IFSM) of 60 A for an 8.3 ms half-sine wave pulse, and 120 A for a 1.0 ms pulse, both tested at TA = 25 °C. These values reflect capability to survive input inrush, lightning-induced transients, or short-circuit events without bond-wire fusing. The 60 A rating is the primary design reference for most SMPS applications. Engineers must ensure PCB trace width and thermal mass can absorb the associated I²t energy (≈29.8 A²·s for 8.3 ms). The HS2DAL datasheet specifies these limits in the Absolute Maximum Ratings table.

Is HS2DAL compatible with lead-free reflow processes, and what is its moisture sensitivity level?

Yes, the HS2DAL is fully compatible with lead-free reflow profiles (peak 260 °C, 10 s max) and carries J-STD-020 Moisture Sensitivity Level 1 - meaning it may be stored indefinitely at ≤30 °C/60% RH without baking prior to assembly. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the UL 94V-0 molding compound withstands multiple reflow cycles. This eliminates moisture-related popcorning risk and simplifies manufacturing. The HS2DAL's Level 1 rating is explicitly stated in the Mechanical Data section of the Taiwan Semiconductor datasheet.

How does the junction capacitance of HS2DAL affect EMI performance in high-speed switching circuits?

The HS2DAL exhibits 32 pF typical junction capacitance at 1 MHz and 4.0 V reverse bias, measured per the datasheet's Electrical Specifications table. This low CJ value limits displacement current during rapid voltage transitions, directly reducing high-frequency common-mode noise generation in DC-DC converters operating above 200 kHz. When paired with proper snubbing and layout, the HS2DAL helps meet CISPR-32 Class B conducted emissions limits. Higher-CJ alternatives would increase dv/dt-induced noise, requiring additional filtering. The HS2DAL's 32 pF is confirmed in Figure 2 of the official characterization curves.