Taiwan Semiconductor Corporation RS2K

Overview

RS2K from Taiwan Semiconductor is a 2 A, 800 V fast recovery surface-mount rectifier in DO-214AA (SMB) package, featuring 500 ns reverse recovery time, 1.3 V max forward voltage at 2 A, and 5 µA max reverse leakage at 25°C. It serves as a primary AC/DC input rectifier in compact offline SMPS designs.

For engineers reviewing the RS2K datasheet, RS2K pinout, RS2K application, or RS2K equivalent, key selection criteria include its 800 V V_RRM, 50 A I_FSM, 175°C T_JMAX, DO-214AA thermal performance (R_θJA = 55°C/W), and suitability for high-frequency flyback and LLC converters requiring low switching loss.

Technical Context

The RS2K operates as a single-die, unidirectional silicon PN junction rectifier with glass-passivated chip construction. Its fast recovery characteristic (t_rr = 500 ns) enables efficient operation in 50–500 kHz switching topologies while maintaining low conduction loss (V_F ≤ 1.3 V @ 2 A).

Thermally, it uses a DO-214AA (SMB) package with matte tin-plated leads compliant to J-STD-002, delivering R_θJL = 18°C/W to lead and supporting continuous operation up to 175°C junction temperature under proper PCB copper area design.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; dual-leaded, single-diode configuration; 0.090 g mass; UL 94V-0 molding compound; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R08 and ES2J, the RS2K delivers optimal balance of 800 V ruggedness, SMB SMT compatibility, and 500 ns recovery in mid-frequency SMPS-making it preferred for space-constrained, cost-sensitive industrial and consumer power supplies where extreme speed is not required.

Availability

RS2K is available at Aetrix Electronics and suitable for AC-DC adapters, LED drivers, and industrial SMPS requiring stable component supply with consistent DO-214AA (SMB) form factor and 800 V rating.

Supply support for RS2K 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 power and protection markets since 1979.

The RS2K belongs to TSC's RS2x fast recovery rectifier family, engineered specifically for high-efficiency, surface-mount AC/DC conversion in cost-sensitive, high-volume power supplies targeting consumer, lighting, and industrial applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for RS2K?

The RS2K has a maximum repetitive peak reverse voltage (V_RRM) of 800 V, verified per Taiwan Semiconductor's L2304 datasheet. This rating ensures reliable blocking capability in 265 V_AC mains applications with sufficient safety margin against line transients. The RS2K is part of the RS2A–RS2M series, where 'K' explicitly denotes the 800 V variant.

Does RS2K support automated SMT assembly?

Yes, RS2K supports automated surface-mount assembly. It uses the DO-214AA (SMB) package with matte tin-plated leads compliant to J-STD-002 solderability standards and moisture sensitivity level 1 per J-STD-020-enabling reflow without baking. Its standardized SMB footprint is compatible with common pick-and-place feeders and stencil apertures used in high-volume power adapter manufacturing.

What is the reverse recovery time (t_rr) of RS2K and how does it affect circuit performance?

The RS2K has a reverse recovery time (t_rr) of 500 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value directly impacts switching loss and EMI in high-frequency SMPS; compared to slower rectifiers, the RS2K reduces tail current and associated diode turn-off dissipation, enabling cleaner waveforms in 100–300 kHz flyback converters without requiring snubbers.

Is RS2K RoHS and halogen-free compliant?

Yes, RS2K is fully RoHS compliant and halogen-free, as confirmed in Taiwan Semiconductor's official documentation. The device uses green molding compound meeting UL 94V-0 flammability rating and satisfies IEC 61249-2-21 requirements. These attributes make RS2K suitable for CE-marked, WEEE-compliant, and export-ready end products across EU, North America, and Asia-Pacific markets.

What thermal resistance values apply to RS2K in DO-214AA package?

The RS2K exhibits R_θJA = 55°C/W (junction-to-ambient, on standard JEDEC test board) and R_θJL = 18°C/W (junction-to-lead). These values assume minimum recommended copper land (≥250 mm², 1 oz.) for heatsinking. For sustained 2 A operation at 50°C ambient, the junction temperature remains within the 175°C limit-critical for long-term reliability in enclosed power adapters and LED drivers.