Taiwan Semiconductor Corporation S2MH

Overview

S2MH from Taiwan Semiconductor is a 2 A, 1000 V surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 50 A surge capability, 1.15 V max forward voltage at 2 A, and AEC-Q101 qualification for automotive use.

For engineers reviewing the S2MH datasheet, S2MH pinout, S2MH application, or S2MH equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), forward current rating (2 A), thermal resistance (R_θJL = 16 °C/W), reverse recovery time (1500 ns), and moisture sensitivity level (MSL 1).

Technical Context

This single-die standard recovery rectifier operates with a maximum junction temperature of 150 °C and supports continuous forward current up to 2 A at case temperatures ≤ 75 °C. Its 1000 V V_RRM rating enables use in high-voltage DC–DC stages and snubber networks where transient clamping and freewheeling are required.

The device exhibits 1.15 V typical forward voltage at 2 A and 25 °C, 1 µA max reverse leakage at rated VR and 25 °C, and 125 µA at 125 °C - confirming stable blocking performance across automotive temperature ranges. Junction capacitance is 30 pF at 4 V reverse bias and 1 MHz.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, cathode indicated by band, matte tin-plated leads, UL 94V-0 molding compound, MSL Level 1, weight ≈ 0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R06 and MUR260, the S2MH provides higher voltage rating (1000 V vs. 600 V), automotive qualification, and surface-mount compatibility - making it uniquely suited for next-generation 48 V automotive power systems requiring robust, compact, and qualified rectification.

Availability

S2MH is available at Aetrix Electronics and suitable for automotive LED lighting, industrial DC–DC converters, snubber networks, and relay freewheeling applications requiring stable component supply and AEC-Q101 compliance.

Supply support for S2MH 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 automotive, industrial, and consumer markets since 1979.

The S2MH belongs to TSC's S2xH family of AEC-Q101-qualified surface-mount rectifiers designed specifically for high-reliability automotive power conversion and protection circuits.

FAQ

What is the peak repetitive reverse voltage rating of the S2MH?

The S2MH has a peak repetitive reverse voltage (V_RRM) rating of 1000 V. This value is confirmed in the Absolute Maximum Ratings table on page 1 of the official Taiwan Semiconductor datasheet (Version A2102). The 1000 V rating allows the S2MH to safely block voltages encountered in 48 V automotive systems with transient margins and in industrial 600–800 V DC bus applications. It is not interchangeable with lower-voltage variants like S2JH (600 V) or S2KH (800 V) without circuit revalidation.

Is the S2MH qualified for automotive applications?

Yes, the S2MH is explicitly AEC-Q101 qualified, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - validating its suitability for under-hood and cabin automotive electronics such as LED drivers, body control modules, and power distribution units. The S2MH's MSL Level 1 and halogen-free construction further support automotive manufacturing requirements.

What is the forward voltage drop of the S2MH at rated current?

The S2MH has a maximum forward voltage (V_F) of 1.15 V at 2 A and 25 °C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss. At elevated junction temperatures (e.g., 125 °C), V_F decreases slightly, but system-level thermal design must ensure average power dissipation remains within limits defined by R_θJL = 16 °C/W and T_J ≤ 150 °C.

Does the S2MH have a specified reverse recovery time?

Yes, the S2MH has a typical 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 is listed in the Electrical Specifications table and confirms the device is a standard (not ultrafast or soft-recovery) rectifier. It is appropriate for line-frequency and low-switching-frequency applications (<20 kHz), but not recommended for high-frequency SMPS where faster recovery (e.g., <100 ns) is required.

What package does the S2MH use, and what are its key mechanical attributes?

The S2MH uses the DO-214AA (SMB) surface-mount package. Key mechanical attributes include matte tin-plated leads compliant with J-STD-002, UL 94V-0 flammability-rated molding compound, cathode polarity indicated by a visible band, and MSL Level 1 per J-STD-020 - meaning it can be reflowed without pre-baking. Its approximate weight is 0.090 g, and the suggested pad layout is provided in the Package Outline Dimensions section of the datasheet.