Taiwan Semiconductor Corporation S1D-T

Overview

S1D-T from Taiwan Semiconductor is a 1 A, 200 V repetitive peak reverse voltage (V_RRM) standard surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring glass passivated junction, low forward voltage drop (≤1.1 V at 1 A), and high surge current capability (40 A I_FSM). It is used in DC-DC converters and switching-mode power supplies where compact size and thermal reliability are critical.

For engineers reviewing the S1D-T datasheet, S1D-T pinout, S1D-T application, or S1D-T equivalent, key selection factors include its 200 V V_RRM, 40 A non-repetitive surge rating, DO-214AC mechanical compatibility, 1500 ns reverse recovery time, and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The S1D-T is a single-die, unidirectional standard recovery rectifier optimized for general-purpose AC/DC and DC/DC conversion. Its 1500 ns reverse recovery time (trr) and 12 pF junction capacitance reflect standard recovery behavior suitable for ≤100 kHz operation, not fast or ultrafast switching.

Thermally, it delivers R_θJL = 30 °C/W and R_θJA = 85 °C/W in DO-214AC package, enabling 1 A continuous conduction with appropriate PCB copper area. The cathode band marking and matte tin-plated leads ensure automated assembly compatibility and J-STD-002 solderability.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration. Cathode identified by molded band on body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M100S1G and VS-1EWH02-M3/5A, the S1D-T offers the lowest V_RRM (200 V) in its family but highest I_FSM (40 A), making it optimal for 100–120 VAC-fed supplies needing robust surge tolerance without over-specifying voltage rating.

Availability

S1D-T is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and industrial AC adapters requiring stable component supply, RoHS-compliant sourcing, and DO-214AC footprint consistency.

Supply support for S1D-T 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 rectifiers, TVS diodes, MOSFETs, and bipolar transistors.

The S1D-T belongs to TSC's S1x-T standard rectifier family, designed specifically for cost-sensitive, high-volume AC/DC and DC/DC power conversion applications where reliability, manufacturability, and regulatory compliance are prioritized over ultrafast switching.

FAQ

What is the maximum junction temperature rating for the S1D-T?

The S1D-T has a maximum junction temperature (T_J(max)) of +150°C, as specified in its Absolute Maximum Ratings table. This rating applies across the full operating ambient range and must be respected in thermal design. Derating curves show that average forward current drops to zero at this temperature. Proper PCB copper area and airflow are required to maintain safe operation of the S1D-T under continuous 1 A load.

Does the S1D-T have a fast or standard reverse recovery time?

The S1D-T has a standard reverse recovery time (t_rr) of 1500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This confirms it is a standard recovery rectifier-not fast or ultrafast-making it suitable for line-frequency and ≤100 kHz switching applications. Its 1500 ns t_rr is consistent across the S1x-T family and documented in the Electrical Specifications section of the S1D-T datasheet.

Is the S1D-T RoHS and halogen-free compliant?

Yes, the S1D-T is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance statements appear in the FEATURES section of the official Taiwan Semiconductor datasheet (Version E2102). The device uses matte tin-plated leads and UL 94V-0 molding compound, satisfying environmental requirements for industrial and consumer end equipment without requiring special handling or exemptions.

What is the packaging format and reel quantity for the S1D-T?

The S1D-T is supplied in tape-and-reel packaging per the Ordering Information table: 7,500 units per reel. The package type is DO-214AC (SMA), and the reel conforms to industry-standard EIA-481 specifications for automated SMT placement. No alternate packaging (e.g., bulk or ammo pack) is listed for the S1D-T in the official documentation.

How does the S1D-T compare to other parts in the S1x-T family?

The S1D-T is the 200 V variant in the S1x-T family, distinguished by its S1D marking code and 40 A I_FSM rating-the highest surge rating in the series. Other variants (e.g., S1G-T, S1J-T) offer higher V_RRM but lower I_FSM (30 A). All share DO-214AC packaging, glass passivation, and identical thermal and mechanical specs, enabling footprint compatibility across voltage grades while requiring voltage-specific selection.