Taiwan Semiconductor Corporation S1DB R5G

Overview

S1DB R5G from Taiwan Semiconductor is a 1 A, 200 V repetitive peak reverse voltage (V_RRM) surface-mount standard rectifier diode in DO-214AA (SMB) package, featuring low forward voltage drop (1.1 V @ 1 A), high surge current capability (30 A), and glass passivated junction for reliability in power conversion circuits.

For engineers reviewing the S1DB R5G datasheet, S1DB R5G pinout, S1DB R5G application, or S1DB R5G equivalent, key selection criteria include V_RRM = 200 V, I_F = 1 A, I_FSM = 30 A, T_JMAX = 150 °C, and DO-214AA mechanical compatibility - critical for SMPS, AC/DC adapters, and lighting converters requiring robust, RoHS-compliant discrete rectification.

Technical Context

The S1DB R5G operates as a single-die, unidirectional silicon rectifier with cathode-band polarity indication and matte tin-plated leads compliant with J-STD-002 solderability. Its glass-passivated junction ensures stable reverse leakage (<5 µA @ 25 °C, <50 µA @ 125 °C) and withstands moisture sensitivity level 1 per J-STD-020.

Thermally, it delivers R_θJL = 30 °C/W from junction to lead, enabling reliable operation up to 150 °C junction temperature. The device exhibits C_J = 12 pF at 1 MHz / 4 V and supports 8.3 ms half-sine surge waveforms without degradation.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, molded case meeting UL 94V-0, with cathode band indicating terminal polarity. Weight ≈ 0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR120 and VS-1EWH02-M3/5AT, the S1DB R5G provides optimal balance of low V_F, proven reliability in commercial power supplies, and broad global distribution - making it preferred for cost-sensitive, high-volume adapter and lighting applications where ultrafast recovery or automotive qualification are unnecessary.

Availability

S1DB R5G is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting drivers requiring stable component supply, JEDEC-compliant packaging, and RoHS/halogen-free compliance.

Supply support for S1DB R5G 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, industrial, and consumer markets since 1979.

The S1DB R5G belongs to TSC's S1AB–S1MB standard rectifier family, engineered for high-volume, cost-effective AC/DC front-end and secondary-side rectification in energy-efficient power conversion systems.

FAQ

What is the maximum junction temperature rating for the S1DB R5G?

The S1DB R5G has a maximum junction temperature (T_JMAX) of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This allows operation in thermally demanding environments such as enclosed LED drivers or high-density SMPS. Derating curves confirm usable current capacity down to 0.5 A at 125 °C ambient with appropriate PCB copper area. Thermal design must respect R_θJL = 30 °C/W to avoid exceeding T_JMAX under full load.

Does the S1DB R5G have a halogen-free construction?

Yes, the S1DB R5G uses a halogen-free molding compound compliant with IEC 61249-2-21, as explicitly stated in the Taiwan Semiconductor product documentation. This satisfies environmental compliance requirements for export to EU, Japan, and other regulated markets. The device also meets RoHS Directive 2011/65/EU and is marked "Green Compound" (G) in its marking diagram, confirming absence of brominated flame retardants and other restricted halogens.

What is the reverse leakage current specification for the S1DB R5G at elevated temperature?

The S1DB R5G specifies reverse leakage current (I_R) ≤ 50 µA at T_J = 125 °C and rated V_R, per electrical specifications in the Taiwan Semiconductor datasheet. At 25 °C, I_R is ≤ 5 µA. These values are measured using a 30 ms pulse test, ensuring relevance to real-world transient conditions. Designers should verify thermal management to prevent sustained operation near 125 °C junction, where leakage increases exponentially.

Is the S1DB R5G suitable for automated SMT assembly without pre-baking?

Yes, the S1DB R5G carries moisture sensitivity level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/60% RH and placed directly into reflow without baking. Its DO-214AA (SMB) package and matte tin-plated leads meet J-STD-002 solderability requirements. This eliminates process steps and cost associated with dry-packing or floor-life tracking - ideal for high-throughput adapter and lighting manufacturing.

What does the 'R5G' suffix indicate in the S1DB R5G part number?

The 'R5G' suffix in S1DB R5G denotes Taiwan Semiconductor's internal packaging and environmental coding: 'R' indicates tape-and-reel packaging (3,000 pcs/reel), '5' specifies green compound (halogen-free), and 'G' confirms RoHS compliance. This matches the ordering information table in the official datasheet and distinguishes it from variants like S1DB R5 (non-RoHS) or S1DB (bulk). No functional or electrical difference exists between S1DB and S1DB R5G beyond compliance and packaging.