Taiwan Semiconductor Corporation S1KFSHMWG

Overview

S1KFSHMWG from Taiwan Semiconductor is a 1 A, 800 V surface-mount standard rectifier diode in SOD-128 package, featuring glass-passivated junction, 30 A surge rating, and 150 °C max junction temperature-used in DC-DC converters and switching-mode inverters.

For engineers reviewing the S1KFSHMWG datasheet, S1KFSHMWG pinout, S1KFSHMWG application, or S1KFSHMWG equivalent, key selection criteria include repetitive peak reverse voltage (800 V), forward voltage at 1 A (≤1.1 V @ 25°C), thermal resistance (R_θJL = 29 °C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance.

Technical Context

The S1KFSHMWG is a single-die, unidirectional silicon rectifier optimized for high-efficiency AC/DC and DC/DC conversion stages. Its glass-passivated junction ensures stable reverse leakage (<1 µA @ 25°C, <50 µA @ 125°C) and robust surge tolerance (30 A I_FSM, 8.3 ms half-sine).

Thermally, it delivers R_θJL = 29 °C/W and R_θJA = 82 °C/W on a 5 mm × 5 mm Cu pad PCB-enabling reliable operation up to 150 °C junction temperature with minimal derating in compact power designs.

Key Specifications

Pinout & Package

Package: SOD-128 - surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity indicated by cathode band, weight ≈0.027 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R08S and MUR108, the S1KFSHMWG offers superior surge capability (30 A), lower thermal resistance (29 °C/W vs. ≥90 °C/W), and tighter V_F spec (≤1.1 V), making it optimal for thermally dense, high-reliability industrial power stages.

Availability

S1KFSHMWG is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose rectification requiring stable component supply across industrial, automotive, and consumer electronics programs.

Supply support for S1KFSHMWG 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, industrial, and computing markets since 1979.

The S1KFSHMWG belongs to TSC's S1xFS family of standard rectifiers-designed specifically for cost-sensitive, high-volume AC/DC and DC/DC power conversion where reliability, thermal performance, and regulatory compliance are critical.

FAQ

What is the maximum junction temperature rating for the S1KFSHMWG?

The S1KFSHMWG has a maximum junction temperature (T_J) of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating allows continuous operation in high-ambient environments such as enclosed industrial power supplies or motor control enclosures. Derating begins above 25 °C ambient per the forward current derating curve, and thermal design must account for R_θJL = 29 °C/W to ensure the S1KFSHMWG stays within safe operating limits.

Does the S1KFSHMWG have a halogen-free construction?

Yes, the S1KFSHMWG is halogen-free in accordance with IEC 61249-2-21, as confirmed in the "Features" section of the Taiwan Semiconductor datasheet. The molding compound and internal materials contain no brominated or chlorinated flame retardants. This specification supports compliance with environmental directives in EU, Japan, and North American markets-and is documented in the product's material declaration available from Taiwan Semiconductor upon request.

What is the marking code printed on the S1KFSHMWG device body?

The S1KFSHMWG is marked with "S1KFS" on its body, consistent with Taiwan Semiconductor's ordering code convention where "K" denotes the 800 V V_RRM variant. The full marking includes date code (YW) and factory code (F), per the "Marking Diagram" on page 4 of the datasheet. No additional alphanumeric suffix appears on the device-it is not marked "HMWG" physically; that suffix indicates tape-and-reel packaging per ordering information.

Is the S1KFSHMWG suitable for use in automotive applications?

The S1KFSHMWG is not qualified to AEC-Q101 and is not recommended for safety-critical automotive functions such as ADAS or powertrain. However, it may be used in non-safety-critical automotive subsystems-including body control modules, lighting drivers, and infotainment power rails-provided system-level validation confirms thermal, surge, and lifetime requirements. Taiwan Semiconductor explicitly states these devices are "not designed for medical, life-saving, or life-sustaining applications," and automotive use remains at the customer's risk.

What is the moisture sensitivity level (MSL) of the S1KFSHMWG?

The S1KFSHMWG has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/85 % RH and placed directly onto PCBs without baking or dry-pack requirements. This eliminates pre-reflow handling steps, reduces manufacturing cost, and improves yield in high-speed SMT lines-confirmed in the "Features" section and mechanical data tables of the official Taiwan Semiconductor datasheet.