Taiwan Semiconductor Corporation RS2AA

Overview

RS2AA from Taiwan Semiconductor is a 1.5A, 50V fast recovery surface-mount rectifier in DO-214AC (SMA) package, featuring 150 ns reverse recovery time, 1.3 V max forward voltage at 1.5 A, and 5 µA max reverse leakage at 25°C. It serves as a primary output rectifier in low-voltage DC-DC converters requiring high efficiency and compact footprint.

For engineers reviewing the RS2AA datasheet, RS2AA pinout, RS2AA application, or RS2AA equivalent, key selection criteria include its 50 V repetitive peak reverse voltage rating, 50 A surge capability, thermal resistance of 18 °C/W junction-to-lead, RoHS/halogen-free compliance, and suitability for automated SMT assembly.

Technical Context

The RS2AA employs a single-die, glass-passivated PN junction optimized for fast switching in medium-frequency power conversion. Its 150 ns trr and 50 pF junction capacitance support operation up to ~2 MHz in snubberless flyback and buck topologies.

Rated for continuous operation from –55°C to +175°C junction temperature, it delivers stable forward conduction with VF drift < 0.2 V across full temperature range and maintains IR ≤ 200 µA at 125°C - critical for standby-loss-sensitive lighting and adapter designs.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount plastic case with cathode band marking; dimensions per JEDEC DO-214AC, 4.60 × 2.83 × 2.30 mm; matte tin-plated leads, J-STD-002 solderable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1L06U and MBR150, the RS2AA provides optimal balance of 50 V rating, 1.5 A current, 150 ns trr, and 175°C junction capability - making it uniquely suited for cost-sensitive, thermally demanding 24–48 V industrial power supplies where Schottky leakage or ultra-high-voltage ratings are unnecessary.

Availability

RS2AA is available at Aetrix Electronics and suitable for LED driver secondary rectification, low-voltage DC-DC converter output stages, and industrial sensor power supplies requiring stable component supply, RoHS/halogen-free compliance, and extended temperature operation.

Supply support for RS2AA 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 devices, and MOSFETs for industrial and consumer markets.

The RS2AA belongs to TSC's RS2x series of fast recovery rectifiers designed specifically for high-efficiency, surface-mount power conversion in space-constrained 24–48 V systems - emphasizing thermal robustness, SMT manufacturability, and consistent parametric performance across lot and temperature.

FAQ

What is the maximum junction temperature rating for RS2AA?

The RS2AA has a maximum junction temperature (TJ MAX) of +175°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet Version I2304. This rating enables reliable operation in sealed enclosures or high-ambient environments without derating below 1.5 A up to 100°C ambient, provided thermal design meets RθJL = 18 °C/W via adequate PCB copper area. The RS2AA maintains specified VF and IR performance across this full range.

Is RS2AA RoHS and halogen-free compliant?

Yes, the RS2AA is certified RoHS compliant and halogen-free per Taiwan Semiconductor's product documentation (Version I2304). The molding compound contains no brominated or chlorinated flame retardants, and lead content is below 1000 ppm. This compliance is confirmed in the "Features" section and supported by TSC's material declarations - essential for export to EU, Japan, and other regulated markets. The RS2AA meets J-STD-020 moisture sensitivity level 1.

What is the reverse recovery time (trr) of RS2AA and how is it measured?

The RS2AA has a reverse recovery time (trr) of 150 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the Electrical Specifications table in the Taiwan Semiconductor datasheet (Version I2304). This value is typical and guaranteed maximum. The test circuit and waveform definition are shown in Figure 6 of the same document. The RS2AA's trr enables stable operation in 100–500 kHz switching power supplies without excessive switching loss or ringing.

Does RS2AA have a specified forward voltage (VF) at 1.5 A?

Yes, the RS2AA specifies a maximum forward voltage (VF) of 1.3 V at IF = 1.5 A and TJ = 25°C, per the Electrical Specifications table (Version I2304). This is a guaranteed upper limit under pulse test conditions (PW = 0.3 ms). At higher temperatures (e.g., 125°C), VF decreases slightly (~1.15 V), while conduction loss remains predictable. The RS2AA's VF directly impacts thermal design and efficiency calculations in 24 V output converters.

What package type does RS2AA use and what are its key mechanical features?

The RS2AA uses the DO-214AC (SMA) surface-mount package, with exact dimensions 4.60 × 2.83 × 2.30 mm and cathode band polarity marking. Key mechanical features include UL 94V-0 flammability-rated molding compound, matte tin-plated leads compliant with J-STD-002, JESD 201 Class 2 whisker resistance, and JEDEC DO-214AC footprint compatibility. The RS2AA's package supports automated pick-and-place and standard reflow profiles without preconditioning.