Taiwan Semiconductor Corporation S1DB

Overview

S1DB from Taiwan Semiconductor is a 1 A, 200 V repetitive peak reverse voltage (V_RRM) standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring low forward voltage drop (1.1 V max at 1 A), high surge current capability (30 A IFSM), and glass passivated junction for reliability in power conversion stages.

For engineers reviewing the S1DB datasheet, S1DB pinout, S1DB application, or S1DB equivalent, key selection criteria include its 200 V V_RRM, 1 A average forward current rating, 30 °C/W junction-to-lead thermal resistance, moisture sensitivity level 1 compliance, and suitability for compact SMPS and AC/DC adapter designs requiring robust single-die rectification.

Technical Context

The S1DB operates as a single-die, unidirectional standard recovery rectifier with a maximum junction temperature of 150 °C and storage range from –55 °C to +150 °C. Its glass-passivated chip junction ensures stable reverse leakage (<5 µA at 25 °C, <50 µA at 125 °C) under rated reverse voltage.

Thermally, it delivers 30 °C/W junction-to-lead resistance and supports pulsed forward currents up to 30 A (8.3 ms half-sine). Its DO-214AA (SMB) package features matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration with cathode band marking. Lead finish: matte tin, J-STD-002 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR120 and VS-1EWH02-M3, the S1DB provides the lowest forward voltage (≤1.1 V), best thermal resistance (30 °C/W), and optimal cost-performance balance for non-high-frequency rectification-making it preferred for cost-sensitive, thermally constrained SMPS and adapter designs.

Availability

S1DB is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and industrial DC power supplies requiring stable component supply, consistent DO-214AA packaging, and RoHS-compliant halogen-free construction.

Supply support for S1DB 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified lines.

The S1AB–S1MB series was designed specifically for cost-effective, high-reliability AC/DC front-end rectification in consumer and industrial power supplies, emphasizing manufacturability, thermal performance, and environmental compliance.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) rating for the S1DB?

The S1DB has a maximum repetitive peak reverse voltage (V_RRM) rating of 200 V, as specified in the absolute maximum ratings table across all versions of the S1AB–S1MB family. This value is confirmed in the "ABSOLUTE MAXIMUM RATINGS" section where S1DB is explicitly assigned 200 V under the V_RRM column. It defines the highest reverse voltage the S1DB can block continuously without breakdown under normal operating conditions.

Does the S1DB have a standard or fast recovery characteristic?

Yes, the S1DB is a standard recovery rectifier diode-not an ultrafast or fast recovery type. Its datasheet does not specify reverse recovery time (t_rr), and its electrical characteristics (e.g., typical forward and reverse curves, absence of t_rr in specs) align with standard recovery behavior. The S1DB is optimized for general-purpose rectification in 50/60 Hz and low-kHz switching applications, not high-frequency PFC or resonant converters.

Is the S1DB compliant with RoHS and halogen-free requirements?

Yes, the S1DB is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance statements appear directly in the FEATURES section of the official Taiwan Semiconductor documentation. The molding compound meets UL 94V-0 flammability rating, and the device carries no exemptions-making it suitable for environmentally regulated markets including EU and China RoHS.

What is the thermal resistance (R_θJL) of the S1DB, and how is it measured?

The S1DB has a typical junction-to-lead thermal resistance (R_θJL) of 30 °C/W, as published in the THERMAL PERFORMANCE section. This value is measured under steady-state conditions from the semiconductor junction to the device's soldered lead (not case or ambient), using standardized test methods per JEDEC JESD51-14. It is used to calculate temperature rise above ambient when designing PCB copper thermal pads.

Can the S1DB be used as a direct replacement for the S1AB or S1GB in an existing design?

No-the S1DB is not a direct replacement for S1AB (50 V) or S1GB (400 V) due to differing V_RRM ratings. While all share the same DO-214AA package, pinout, and thermal specs, substituting across the S1AB–S1MB series requires verifying that the new V_RRM meets or exceeds the circuit's peak reverse voltage stress. Using S1DB in place of S1GB risks reverse breakdown; using it instead of S1AB may over-specify unnecessarily.