Taiwan Semiconductor Corporation S1GMH

Overview

S1GMH from Taiwan Semiconductor is a 1 A, 400 V repetitive peak reverse voltage (V_RRM) standard surface-mount rectifier in Micro SMA package, featuring glass-passivated junction, low forward voltage drop (≤1.10 V at 1 A), and AEC-Q101 qualification for automotive-grade reliability - used in DC-DC converter output stages and snubber networks.

For engineers reviewing the S1GMH datasheet, S1GMH pinout, S1GMH application, or S1GMH equivalent, key selection criteria include its 400 V V_RRM, 20 A I_FSM surge rating, 780 ns reverse recovery time, thermal resistance (R_θJL = 30 °C/W), and Micro SMA mechanical compatibility with automated SMT assembly.

Technical Context

The S1GMH is a single-die, silicon planar junction standard rectifier optimized for medium-voltage, medium-current switching applications. Its glass-passivated chip junction ensures stable leakage performance up to 125 °C (I_R ≤ 50 µA), while the Micro SMA package enables compact board layout and high thermal conduction to PCB copper.

It operates with a maximum junction temperature of 175 °C and exhibits a typical junction capacitance of 5 pF at 4.0 V reverse bias, supporting moderate-frequency switching in snubber and flyback auxiliary circuits. The 780 ns reverse recovery time reflects its non-fast-recovery, standard rectifier classification - suitable for <100 kHz operation where low cost and robustness outweigh ultra-fast switching needs.

Key Specifications

Pinout & Package

Package: Micro SMA - Surface-mount, single-ended, cathode-band marked case with matte tin-plated leads; JEDEC-standardized outline per Taiwan Semiconductor Package Outline Dimensions (Version A2103). Weight: 0.006 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR140 and VS-MBR140, the S1GMH offers superior surge robustness (20 A I_FSM vs. 15–18 A), lower cost, and identical Micro SMA mounting - making it optimal for cost-sensitive, thermally stable, medium-speed automotive rectification where ultrafast recovery is unnecessary.

Availability

S1GMH is available at Aetrix Electronics and suitable for automotive LED lighting, DC-DC converter output rectification, and snubber network applications requiring stable component supply, AEC-Q101 compliance, and Micro SMA surface-mount compatibility.

Supply support for S1GMH 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, specializing in power rectifiers, TVS diodes, and MOSFETs for automotive and industrial markets.

The S1GMH belongs to TSC's S1xMH standard rectifier family, designed specifically for cost-effective, AEC-Q101-compliant surface-mount rectification in automotive body electronics and power conversion systems operating up to 175 °C junction temperature.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S1GMH?

The S1GMH has a maximum repetitive peak reverse voltage (V_RRM) of 400 V, as specified in Taiwan Semiconductor's absolute maximum ratings table. This value is fixed for the S1GMH variant and distinguishes it from the S1JMH (600 V). Exceeding 400 V in continuous reverse bias risks avalanche breakdown and permanent device failure. The S1GMH datasheet confirms this rating applies at T_A = 25°C with derating above that temperature.

Is the S1GMH suitable for automotive applications?

Yes, the S1GMH is AEC-Q101 qualified per its official product documentation, confirming reliability for automotive under-hood and cabin environments. It supports junction temperatures from –55°C to +175°C and meets JESD201 Class 2 whisker resistance and J-STD-020 moisture sensitivity Level 1. These attributes make the S1GMH appropriate for automotive LED lighting drivers, body control modules, and DC-DC converters where extended temperature operation and process robustness are mandatory.

What is the forward voltage (V_F) of the S1GMH at rated current?

The S1GMH exhibits a maximum forward voltage (V_F) of 1.10 V at I_F = 1 A and T_J = 25°C, as stated in the electrical specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At elevated junction temperatures (e.g., 125°C), V_F decreases slightly due to semiconductor physics, but system-level thermal design must ensure average power dissipation remains within limits defined by R_θJL = 30 °C/W.

Does the S1GMH have a fast or standard reverse recovery characteristic?

The S1GMH is a standard (non-fast) rectifier with a typical reverse recovery time (t_rr) of 780 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This t_rr value places it outside the "ultrafast" (<50 ns) or "fast" (50–350 ns) categories. It is intended for line-frequency and low-to-moderate switching frequency applications (e.g., <100 kHz) such as snubbers and flyback outputs where low cost and ruggedness outweigh speed requirements.

What package type does the S1GMH use, and is it compatible with automated assembly?

The S1GMH uses the Micro SMA package - a JEDEC-standardized surface-mount outline with cathode band marking and matte tin-plated leads. It is explicitly designed for automated placement and reflow soldering, with moisture sensitivity level (MSL) 1 per J-STD-020, eliminating bake requirements. The 0.006 g weight and standardized pad layout (per TSC Package Outline Dimensions A2103) ensure high first-pass yield in high-volume SMT lines without special handling.