Taiwan Semiconductor Corporation S1DAL

Overview

S1DAL from Taiwan Semiconductor is a 1 A, 200 V standard surface-mount silicon rectifier diode in a Thin SMA 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 S1DAL datasheet, S1DAL pinout, S1DAL application, or S1DAL equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward voltage at 1 A (≤1.10 V), reverse leakage (≤1 µA at 25 °C), thermal resistance (R_θJL = 29 °C/W), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The S1DAL operates as a single-die, unidirectional standard recovery rectifier with polarity indicated by cathode band. Its glass-passivated junction ensures stable performance under thermal cycling and humidity exposure, while the Thin SMA package enables automated placement on high-density PCBs.

Thermal performance is characterized with R_θJL = 29 °C/W and R_θJA = 82 °C/W on a 5 mm × 5 mm Cu pad test board. Electrical behavior includes low forward voltage (0.96 V typ. at 1 A, 25 °C) and tight reverse leakage control (≤50 µA at 125 °C).

Key Specifications

Pinout & Package

Package: Thin SMA (Surface Mount Axial), low-profile, moisture sensitivity level 1 per J-STD-020, pure tin-plated leads, UL 94V-0 molding compound, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M10S and VS-1EWH02-M3, the S1DAL delivers optimal balance of low forward voltage, industry-standard surge capability, and cost-effective manufacturability for fixed-input 200 V rectification-making it ideal for volume industrial and consumer power supplies where precise voltage matching and thermal predictability are prioritized.

Availability

S1DAL is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for S1DAL 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 industrial, computing, and consumer markets since 1979.

The S1DAL belongs to TSC's S1xAL standard rectifier family, designed specifically for cost-sensitive, high-volume surface-mount power conversion applications demanding reliability, manufacturability, and regulatory compliance without design compromise.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S1DAL?

The S1DAL has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, as specified in the Absolute Maximum Ratings table. This value defines the highest reverse voltage the diode can block repeatedly without breakdown under normal operating conditions. It is confirmed across all official documentation versions (B2103) and distinguishes S1DAL from higher-voltage variants like S1GAL (400 V) and S1MAL (1000 V). Exceeding 200 V risks irreversible avalanche failure.

What is the forward voltage (V_F) of the S1DAL at 1 A and 25 °C?

The S1DAL exhibits a typical forward voltage of 0.96 V and a maximum of 1.10 V at 1 A and 25 °C, per the Electrical Specifications table. This measurement is taken under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects. The low V_F contributes directly to reduced conduction losses in power conversion stages, especially in low-output-voltage DC–DC designs where efficiency margins are narrow.

Does the S1DAL have RoHS and halogen-free compliance?

Yes, the S1DAL is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the FEATURES section of the official documentation. This certification applies to the entire S1DAL–S1MAL family and is verified through material declarations and third-party testing. Compliance ensures suitability for export to EU, China, Korea, and other regulated markets without restriction.

What is the junction-to-lead thermal resistance (R_θJL) of the S1DAL?

The S1DAL has a typical junction-to-lead thermal resistance (R_θJL) of 29 °C/W, measured on a standard 5 mm × 5 mm copper pad test board. This parameter reflects how effectively heat transfers from the silicon die to the solder joint, directly influencing long-term reliability under continuous 1 A load. Lower R_θJL values reduce thermal stress on interconnects and improve lifetime in thermally dense layouts.

What package type does the S1DAL use, and what are its mechanical highlights?

The S1DAL uses the Thin SMA package-a low-profile surface-mount axial outline with pure tin-plated leads, UL 94V-0 flammability-rated molding compound, and cathode polarity marked by a visible band. Its moisture sensitivity level is J-STD-020 Level 1, eliminating pre-reflow baking. At approximately 0.029 g, it supports high-speed automated placement and is optimized for space-constrained power designs.