Taiwan Semiconductor Corporation S2B R5G

Overview

S2B R5G from Taiwan Semiconductor is a 2 A, 100 V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 50 A surge capability, and 1.15 V max forward voltage at 2 A. It is used in AC/DC front-end rectification for compact switching mode power supplies.

For engineers reviewing the S2B R5G datasheet, S2B R5G pinout, S2B R5G application, or S2B R5G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), forward current rating (2 A), thermal resistance (R_θJA = 53 °C/W), reverse recovery time (1500 ns), and moisture sensitivity level (J-STD-020 Level 1).

Technical Context

This standard recovery rectifier uses a single-die silicon PN junction with glass passivation for stable operation under repetitive surge conditions. Its 150 °C maximum junction temperature and JESD201 Class 2 whisker resistance support industrial-grade reliability in convection-cooled layouts.

The device exhibits 30 pF junction capacitance at 4 V reverse bias and 1 µA max reverse leakage at 25 °C - parameters critical for EMI filtering and efficiency trade-offs in offline SMPS input stages where fast recovery is not required.

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 typical weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR220 and VS-2EYH01-M3, the S2B R5G delivers optimal balance of surge robustness (50 A), thermal performance (53 °C/W), and cost for fixed-frequency SMPS below 65 kHz - making it preferred for cost-sensitive, thermally constrained adapter and lighting designs.

Availability

S2B R5G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and AC-DC adapters requiring stable component supply and J-STD-020 Level 1 handling.

Supply support for S2B 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 protection markets since 1979.

The S2A–S2V series targets cost-optimized, high-reliability AC/DC front-end rectification across consumer, industrial, and lighting applications - emphasizing manufacturability, JEDEC-compliant packaging, and consistent parametric yield.

FAQ

What is the maximum junction temperature rating for the S2B R5G?

The S2B R5G has a maximum junction temperature (T_JMAX) of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating enables reliable operation in enclosed power supplies with limited airflow, provided thermal design maintains junction temperature below this limit under worst-case load and ambient conditions. The S2B R5G's R_θJA of 53 °C/W on standard FR-4 helps engineers calculate required board copper area or heatsink interface.

Is the S2B R5G suitable for use in RoHS-compliant and halogen-free assemblies?

Yes, the S2B R5G is both RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the "Features" section of the Taiwan Semiconductor documentation. Its matte tin-plated leads and UL 94V-0 molding compound meet lead-free reflow requirements and environmental regulations for export to EU, Japan, and other regulated markets. The S2B R5G requires no special process adjustments for RoHS-compliant manufacturing.

Does the S2B R5G have a specified reverse recovery time, and how does it affect circuit performance?

Yes, the S2B R5G has a reverse recovery time (t_rr) of 1500 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value confirms its classification as a standard (not fast or ultrafast) recovery rectifier. In practice, the S2B R5G is appropriate for SMPS operating below 65 kHz but may cause excessive switching loss and EMI in higher-frequency topologies - a key differentiator from devices like the MUR220.

What is the moisture sensitivity level (MSL) of the S2B R5G, and what does it mean for assembly?

The S2B R5G is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and can be placed directly from tape-and-reel without pre-baking. This simplifies SMT line logistics and eliminates moisture-related popcorning risk during reflow. The S2B R5G's Level 1 rating is enabled by its hermetically molded DO-214AA package and internal passivation, supporting high-yield automated assembly in high-volume production.

How does the S2B R5G compare to the S2A and S2D variants in the same family?

The S2B R5G shares identical package (DO-214AA), thermal specs (R_θJA = 53 °C/W), and current ratings (I_F = 2 A, I_FSM = 50 A) with S2A and S2D, differing only in V_RRM: S2A = 50 V, S2B = 100 V, S2D = 200 V. All three use the same die process and construction. The S2B R5G is the optimal choice for universal-input (90–264 VAC) SMPS where 100 V provides sufficient margin over 1.414 × 115 VAC peak (~162 V) after derating.