Taiwan Semiconductor Corporation S1DFSHMWG

Overview

S1DFSHMWG from Taiwan Semiconductor is a 1 A, 200 V standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, 30 A surge rating, and 1.0 V max forward voltage at 1.0 A/25°C. It serves as a primary AC/DC input rectifier in compact DC-DC converters and switching inverters where space-constrained PCB layout and thermal reliability are critical.

For engineers reviewing the S1DFSHMWG datasheet, S1DFSHMWG pinout, S1DFSHMWG application, or S1DFSHMWG equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward current rating (1 A), thermal resistance (R_θJA = 82 °C/W), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance for industrial power supply designs.

Technical Context

The S1DFSHMWG is a single-die, unidirectional silicon PN junction rectifier optimized for high-efficiency, low-loss operation in high-frequency switching topologies. Its glass-passivated chip junction ensures stable reverse leakage (<1 µA at 25°C) and robust long-term reliability under thermal cycling.

Thermal performance is defined with reference to a 5 mm × 5 mm copper pad PCB test board: R_θJL = 29 °C/W and R_θJC = 30 °C/W confirm effective heat transfer from junction to lead and case, supporting continuous 1 A conduction at up to +125°C junction temperature.

Key Specifications

Pinout & Package

Package: SOD-128 - Surface-mount, flat-lead, single-diode outline with cathode band marking; 0.027 g weight; UL 94V-0 molding compound; matte tin-plated leads compliant with J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR120SFT1G and VS-1EWH02-M3/5AT, the S1DFSHMWG offers optimal balance of cost, thermal robustness (R_θJA = 82 °C/W), and process maturity for mainstream industrial and consumer power supplies operating below 100 kHz.

Availability

S1DFSHMWG is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose rectification requiring stable component supply across multi-year production cycles.

Supply support for S1DFSHMWG 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, automotive, and industrial markets since 1979.

The S1DFS–S1MFS family was designed specifically for cost-sensitive, high-volume AC/DC and DC/DC power conversion applications demanding reliable, standardized rectification in compact SMD packages.

FAQ

What is the maximum junction temperature rating for S1DFSHMWG?

The S1DFSHMWG has a maximum junction temperature (T_JMAX) of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet Version C2103. This allows continuous 1 A operation in sealed enclosures or high-ambient environments when mounted on a 5 mm × 5 mm copper pad. Derating begins above +75°C ambient per the forward current derating curve in Figure 1.

Does S1DFSHMWG have a specified reverse recovery time (t_rr)?

No, the S1DFSHMWG datasheet does not specify reverse recovery time (t_rr). It is characterized as a standard (not ultrafast or soft-recovery) rectifier, with typical t_rr estimated at ~500 ns based on its 200 V VRRM and 1 A IF rating. For designs requiring controlled turn-off behavior or low EMI, an ultrafast alternative like MUR120SFT1G should be evaluated instead of relying on S1DFSHMWG for fast-switching roles.

What does the 'HMWG' suffix indicate in S1DFSHMWG?

The 'HMWG' suffix in S1DFSHMWG denotes Taiwan Semiconductor's internal tape-and-reel packaging code: H = carrier tape width (12 mm), MW = moisture barrier dry pack, G = Pb-free/RoHS-compliant finish. It confirms the device ships in JEDEC-standard 14,000-unit reels meeting J-STD-020 Level 1 handling requirements-no bake step needed prior to SMT placement.

Can S1DFSHMWG replace SMA package rectifiers like 1N4007 in new designs?

Yes, S1DFSHMWG can replace through-hole 1N4007 in new SMT-based designs-but only where board space, automated assembly, and thermal performance justify the change. While both are 1 A/1000 V-rated, S1DFSHMWG is rated for 200 V VRRM and uses SOD-128 packaging. Direct substitution requires verifying voltage margin, layout thermal relief, and ensuring cathode band orientation matches PCB silkscreen polarity.

Is S1DFSHMWG suitable for use in medical equipment power supplies?

No, Taiwan Semiconductor explicitly states that the S1DFS–S1MFS family "is not designed for use in medical, life-saving, or life-sustaining applications." The S1DFSHMWG lacks AEC-Q101 qualification, long-term reliability data under accelerated life testing for Class III medical standards, and fails to meet IEC 60601 creepage/clearance requirements out-of-the-box. Use only in non-critical industrial or consumer power stages.