Taiwan Semiconductor Corporation S2BHM4G

Overview

S2BHM4G from Taiwan Semiconductor is a 100 V, 2 A standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring 50 A surge capability, 1.15 V max forward voltage at 2 A, and 1 µA max reverse leakage at 25°C - used in AC/DC front-end rectification for compact switch-mode power supplies.

For engineers reviewing the S2BHM4G datasheet, S2BHM4G pinout, S2BHM4G application, or S2BHM4G equivalent, key selection criteria include repetitive peak reverse voltage (V_RRM = 100 V), thermal resistance (R_θJA = 53 °C/W), junction capacitance (C_J = 30 pF), reverse recovery time (t_rr = 1500 ns), and moisture sensitivity level (MSL 1).

Technical Context

This device is a single-die, glass-passivated, standard recovery rectifier optimized for cost-sensitive, medium-voltage DC power conversion where fast switching is not required. Its 1500 ns reverse recovery time and 30 pF junction capacitance reflect trade-offs favoring low conduction loss over high-frequency performance.

Designed for automated placement and reflow soldering, it meets J-STD-002 for solderability and JESD 201 Class 2 for tin whisker resistance. The cathode band polarity marking and UL 94V-0 molding compound support reliable board-level integration in consumer and industrial adapters.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band; MSL Level 1; weight ≈ 0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R06 and MUR220, the S2BHM4G prioritizes low-cost, low-V_F standard recovery performance at 100 V - making it optimal for cost-driven, thermally constrained 25–45 W adapters where ultrafast recovery is unnecessary and surge robustness is critical.

Availability

S2BHM4G is available at Aetrix Electronics and suitable for switch-mode power supplies, LED lighting drivers, and AC/DC adapters requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for S2BHM4G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, MOSFETs, and IGBTs.

The S2A–S2V series was developed to deliver high-surge, cost-optimized standard rectifiers for mainstream AC/DC conversion - balancing thermal robustness, solderability, and regulatory compliance for global power adapter and industrial power supply markets.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for S2BHM4G?

The S2BHM4G has a V_RRM of 100 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version N2102). This rating defines the highest instantaneous reverse voltage the diode can block repeatedly without breakdown, and is verified under standard test conditions at T_A = 25°C. Designers should apply derating per application temperature and surge conditions when using S2BHM4G in real-world circuits.

Is S2BHM4G suitable for use in high-frequency switching applications?

No - the S2BHM4G is a standard recovery rectifier with t_rr = 1500 ns, making it unsuitable for high-frequency (>100 kHz) switching topologies like resonant LLC or active-clamp forward converters. It is engineered for line-frequency and low-frequency (<50 kHz) applications such as basic SMPS front-ends and auxiliary supplies. For high-frequency use, consider ultrafast alternatives like MUR220; S2BHM4G remains optimal where low V_F and surge tolerance outweigh speed needs.

Does S2BHM4G meet RoHS and halogen-free requirements?

Yes - the S2BHM4G complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, as explicitly stated in the Features section of the Taiwan Semiconductor datasheet. Its matte tin-plated leads, lead-free solder compatibility, and UL 94V-0 molding compound support environmental compliance for global market access. These attributes are validated for the DO-214AA package variant shipped as S2BHM4G.

What is the thermal resistance from junction to ambient (R_θJA) for S2BHM4G?

The S2BHM4G has an R_θJA of 53 °C/W, measured under standard JEDEC test conditions (single device on 1-inch² FR-4 board with 2 oz copper). This value reflects its thermal performance in typical SMB-mounted configurations and informs heatsinking requirements - for example, sustained 2 A operation at 70°C ambient requires ≤30°C temperature rise, limiting allowable power dissipation to ~0.57 W without additional copper area. The datasheet confirms this R_θJA applies specifically to the S2BHM4G variant.

Can S2BHM4G be used as a direct replacement for S2B in existing designs?

Yes - S2BHM4G and S2B share identical electrical specifications (V_RRM = 100 V, I_F = 2 A, t_rr = 1500 ns), DO-214AA (SMB) package, and marking convention (S2B). The "HM4G" suffix denotes tape-and-reel packaging (3,000 pcs/reel) and green compound, but does not alter electrical or thermal behavior. No PCB or schematic changes are needed when substituting S2BHM4G for S2B in legacy designs meeting the same reliability and environmental requirements.