Taiwan Semiconductor Corporation S1K-T

Overview

S1K-T from Taiwan Semiconductor is a 1 A, 800 V repetitive peak reverse voltage (VRRM) standard surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring glass passivated junction, 40 A peak forward surge current (IFSM), and low 1.1 V forward voltage at 1 A - used in DC-DC converters and switching-mode power supplies.

For engineers reviewing the S1K-T datasheet, S1K-T pinout, S1K-T application, or S1K-T equivalent, key selection criteria include VRRM rating, IFSM capability, thermal resistance (R_θJL = 30 °C/W), reverse leakage at 125 °C, and DO-214AC mechanical compatibility for automated placement on high-density PCBs.

Technical Context

The S1K-T is a single-die, unidirectional standard recovery rectifier with 800 V blocking capability and 1500 ns reverse recovery time (trr) under IF = 0.5 A / IR = 1.0 A conditions. Its glass-passivated junction ensures stable performance across -55 °C to +150 °C junction temperature range.

Thermal design relies on low junction-to-lead resistance (30 °C/W) and moderate junction-to-ambient resistance (85 °C/W); it supports continuous 1 A forward current with derating above 75 °C ambient, and handles 40 A non-repetitive surge per JESD22-A112.

Key Specifications

Pinout & Package

DO-214AC (SMA) surface-mount package with cathode-indicated band; two-terminal device (anode and cathode), matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 1A whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R08 and 1N4007G, the S1K-T offers optimal balance of surge robustness (40 A IFSM), thermal performance (30 °C/W R_θJL), and DO-214AC manufacturability - making it preferred for production-grade 50–100 kHz industrial power supplies requiring reliability and automated assembly.

Availability

S1K-T is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial control power rails requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for S1K-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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The S1K-T belongs to TSC's S1x-T standard rectifier family, engineered for cost-sensitive, high-volume power conversion applications demanding robust surge handling, automated assembly readiness, and extended temperature reliability.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) rating for the S1K-T?

The S1K-T has a VRRM rating of 800 V, meaning it reliably blocks up to 800 V of repetitive reverse voltage without breakdown. This value is explicitly specified in the Absolute Maximum Ratings table for S1K-T in the E2102 datasheet revision and distinguishes it from adjacent variants like S1J-T (600 V) and S1M-T (1000 V). Designers must ensure system-level reverse transients remain below this limit with appropriate safety margin.

Does the S1K-T have a defined reverse recovery time (trr), and how is it measured?

Yes, the S1K-T has a reverse recovery time (trr) of 1500 ns, measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is documented in the Electrical Specifications section of the E2102 datasheet and reflects its standard recovery behavior - suitable for line-frequency and medium-frequency (<100 kHz) switching applications, but not optimized for high-frequency synchronous rectification.

What package type does the S1K-T use, and what are its key mechanical features?

The S1K-T uses the DO-214AC (SMA) surface-mount package. Key mechanical features include a glass-molded case meeting UL 94V-0 flammability rating, matte tin-plated leads compliant with J-STD-002 solderability, polarity indicated by a cathode band, and a weight of approximately 0.060 g. Its dimensions and pad layout are fully specified in the Package Outline Dimensions section of the E2102 datasheet.

Is the S1K-T suitable for high-temperature industrial environments?

Yes, the S1K-T supports junction temperatures from -55 °C to +150 °C and storage temperatures over the same range. Its thermal resistance values (R_θJL = 30 °C/W, R_θJA = 85 °C/W) enable reliable operation in industrial control cabinets and power supplies where ambient temperatures reach 85 °C - provided adequate PCB copper area is allocated for heat dissipation per the derating curve in Figure 1 of the E2102 datasheet.

How many units of S1K-T are supplied per reel, and what is the packing format?

The S1K-T is supplied in tape-and-reel packaging containing 7,500 units per reel, as stated in the Ordering Information section of the E2102 datasheet. This format is optimized for high-speed automated placement equipment and aligns with industry-standard feeders for DO-214AC components. No alternate packing formats (e.g., bulk or ammo pack) are specified for this part number.