Taiwan Semiconductor Corporation RS2B R5G

Overview

RS2B R5G from Taiwan Semiconductor is a 2A, 100V fast recovery surface-mount rectifier in DO-214AA (SMB) package, featuring 250 ns reverse recovery time, 1.3 V max forward voltage at 2A, and 5 µA max reverse leakage at 25°C. It serves as primary AC/DC input rectification in compact switching power supplies.

For engineers reviewing the RS2B R5G datasheet, RS2B R5G pinout, RS2B R5G application, or RS2B R5G equivalent, key selection criteria include V_RRM = 100 V, I_F = 2 A, t_rr = 250 ns, thermal resistance R_θJA = 55 °C/W, and SMB package compatibility with automated SMT assembly.

Technical Context

This discrete diode operates as a unidirectional current switch with fast recovery optimized for high-frequency SMPS operation up to several hundred kHz. Its glass-passivated junction ensures stable performance across -55°C to +175°C junction temperature range and supports surge currents up to 50 A (8.3 ms half-sine).

The device exhibits low capacitance (50 pF at 1 MHz, 4 V), enabling minimal switching loss in flyback and forward converter topologies. Its moisture sensitivity level 1 rating and RoHS/halogen-free compliance meet industrial and consumer manufacturing requirements without baking preconditioning.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount plastic case with cathode band marking; dimensions 4.60 × 3.95 × 2.20 mm (L × W × H); 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 MUR210 and VS-2EYH01-M3/54, RS2B R5G offers identical t_rr to the Vishay part and matches SMB footprint, while trading 0.15 V higher V_F for broader supply chain availability and MSL-1 handling advantage over the ON Semi part's MSL-2 rating.

Availability

RS2B R5G is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, LED lighting drivers, and DC-DC converter input stages requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for RS2B 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, serving global power and signal conditioning markets since 1979.

The RS2x series is part of TSC's fast recovery rectifier product line, engineered specifically for high-efficiency, high-density AC/DC conversion in consumer, industrial, and lighting applications where thermal robustness and automated assembly compatibility are critical.

FAQ

What is the maximum junction temperature rating for RS2B R5G?

The RS2B R5G has a maximum junction temperature (T_J) rating of +175°C, verified per absolute maximum ratings table. This allows reliable operation in enclosed or high-ambient environments such as sealed LED drivers or industrial power modules. Derating curves confirm usable current capacity down to -55°C storage, and thermal resistance values (R_θJA = 55 °C/W, R_θJL = 18 °C/W) enable accurate thermal modeling for the RS2B R5G in real-world PCB layouts.

Is RS2B R5G compatible with lead-free reflow soldering processes?

Yes, RS2B R5G features matte tin-plated leads qualified per J-STD-002 for solderability and is rated for lead-free reflow profiles up to 260°C peak temperature. Its moisture sensitivity level 1 classification means it can be used directly from dry pack without baking, simplifying SMT line integration. The UL 94V-0 molding compound also ensures stability under repeated thermal cycling encountered in lead-free assembly, making RS2B R5G fully compliant for modern RoHS-compliant manufacturing.

What does the 'R5G' suffix indicate in RS2B R5G?

The 'R5G' suffix in RS2B R5G is Taiwan Semiconductor's internal date and process code, not an electrical variant identifier. All RS2B devices share identical electrical specifications regardless of suffix; 'R5G' denotes a specific wafer lot and assembly batch produced under version L2304 of the datasheet. Electrical parameters-including V_RRM = 100 V, t_rr = 250 ns, and V_F ≤ 1.3 V-are guaranteed across all RS2B-marked units, including RS2B R5G.

How does RS2B R5G compare to RS2A in terms of reverse voltage rating?

RS2B R5G has a repetitive peak reverse voltage (V_RRM) rating of 100 V, whereas RS2A is rated at 50 V. Both share identical forward current (2 A), surge rating (50 A), thermal resistance (55 °C/W), and package (DO-214AA). The higher V_RRM makes RS2B R5G suitable for 100 V DC bus applications or 70 V RMS AC inputs, while RS2A is limited to ≤35 V RMS. No other parameter differences exist between RS2B R5G and RS2A beyond V_RRM.

Can RS2B R5G be used in place of a Schottky diode in low-voltage applications?

No-RS2B R5G is a fast recovery PN-junction rectifier, not a Schottky diode. Its typical forward voltage (≤1.3 V) is significantly higher than Schottky devices (0.3–0.5 V), resulting in greater conduction loss below 5 V output. Additionally, its 250 ns t_rr is slower than most Schottkys (<10 ns), increasing switching loss in high-frequency, low-V_OUT buck converters. RS2B R5G is optimized for 100 V-class AC/DC rectification-not low-voltage synchronous rectification-so it should not replace Schottky diodes in 3.3 V or 5 V output stages.