Taiwan Semiconductor Corporation S1D-K

Overview

S1D-K from Taiwan Semiconductor is a 1A, 200V standard surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring glass-passivated junction, 30A peak surge current capability, 1.1V max forward voltage at 1A, and 1µA max reverse leakage at 25°C - used in DC-DC converters and switching-mode power supplies.

For engineers reviewing the S1D-K datasheet, S1D-K pinout, S1D-K application, or S1D-K equivalent, key selection criteria include repetitive peak reverse voltage (200V), thermal resistance (R_θJL = 30°C/W), junction capacitance (12pF), reverse recovery time (1500ns), and moisture sensitivity level (J-STD-020 Level 1).

Technical Context

The S1D-K is a single-die, unidirectional standard recovery rectifier with cathode-band polarity marking. Its 150°C maximum junction temperature and JESD201 Class 1A whisker-tested matte tin leads support reliable automated assembly in high-volume production environments.

Designed for general-purpose rectification, it operates with 140V RMS reverse voltage rating and exhibits 85°C/W junction-to-ambient thermal resistance under standard PCB mounting conditions - enabling use in compact, thermally constrained power stages without forced cooling.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 1A whisker requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R02FL and 1N4001G, the S1D-K delivers optimal balance of surge robustness (30A), thermal performance (R_θJL = 30°C/W), and manufacturability (Level 1 MSL, SMA package) for cost-sensitive 200V industrial DC-DC and inverter freewheeling applications.

Availability

S1D-K is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose rectification requiring stable component supply across industrial OEM and embedded power design programs.

Supply support for S1D-K 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 S1D-K belongs to TSC's S1x-K family of standard recovery rectifiers designed specifically for cost-effective, high-yield SMT deployment in mid-power switching power supplies and industrial control systems.

FAQ

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

The S1D-K has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version E2102). This rating allows operation in high-ambient environments such as enclosed industrial power supplies or under-hood automotive auxiliary circuits. Derating curves confirm usable current capacity down to 0A at 150°C lead temperature. The S1D-K must be mounted on PCB copper sufficient to maintain T_J ≤ 150°C under worst-case load and ambient conditions.

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

Yes, the S1D-K is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21, as explicitly stated in the Taiwan Semiconductor product documentation (Version E2102). The device uses matte tin-plated leads and UL 94V-0 molding compound, supporting environmentally regulated markets including Europe, Japan, and China. Compliance is verified by TSC's material declarations and third-party test reports available upon request for the S1D-K.

What does the "K" suffix indicate in S1D-K?

The "K" suffix in S1D-K denotes tape-and-reel packaging: 7,500 units per reel in DO-214AC (SMA) format, as specified in the Taiwan Semiconductor ordering information (Version E2102). It does not indicate temperature grade, reliability level, or electrical variant - all S1x-K variants share identical die and electrical specs. The "x" placeholder (here "D") encodes the V_RRM rating: S1D-K = 200V, confirmed in the Absolute Maximum Ratings table for the S1D-K row.

Can the S1D-K replace a 1N4007 in a 230VAC input circuit?

No - the S1D-K has a 200V V_RRM, while a 230VAC input produces ~325V peak reverse voltage. Using S1D-K risks avalanche breakdown and premature failure. A 1N4007 (1000V V_RRM) or S1M-K (1000V) is required for universal AC input rectification. The S1D-K is rated only for ≤200V DC or ≤140V RMS AC applications, as defined in its Absolute Maximum Ratings table for the S1D-K row.

What is the reverse recovery time (t_rr) of the S1D-K and how is it measured?

The S1D-K has a typical reverse recovery time (t_rr) of 1500 ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A per the Electrical Specifications table (Version E2102). This value reflects standard recovery behavior - not fast or ultrafast - making it suitable for ≤50kHz switching but not high-frequency resonant topologies. The test circuit diagram is provided in Figure 6 of the S1D-K datasheet, confirming measurement methodology and conditions applicable to the S1D-K.