Taiwan Semiconductor Corporation S1MB R5G

Overview

S1MB R5G from Taiwan Semiconductor is a 1A, 1000V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 1.1V max forward voltage at 1A/25°C, 30A surge capability, and J-STD-020 Level 1 moisture sensitivity - used in AC/DC front-end stages of industrial SMPS and LED drivers.

For engineers reviewing the S1MB R5G datasheet, S1MB R5G pinout, S1MB R5G application, or S1MB R5G equivalent, key selection criteria include peak reverse voltage rating (1000V), thermal resistance (30°C/W), junction capacitance (12pF), RoHS/halogen-free compliance, and SMB package compatibility with automated SMT assembly.

Technical Context

This single-die standard recovery rectifier operates with a maximum junction temperature of 150°C and supports repetitive reverse voltages up to 1000V. Its low forward voltage drop (≤1.1V @ 1A, 25°C) and high surge current rating (30A, 8.3ms half-sine) enable efficient power conversion in compact, thermally constrained designs.

The device uses a glass-passivated PN junction for enhanced reliability and stability under thermal cycling. Terminal construction meets J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements, with matte tin-plated leads and UL 94V-0 molding compound.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode band marking; 2-terminal unidirectional configuration; matte tin-plated leads; weight ≈ 0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06U and MUR1100, the S1MB R5G delivers optimal balance of high-voltage margin (1000V), low VF (≤1.1V), SMB surface-mount compatibility, and cost-effective volume procurement - making it preferred for new SMT-based industrial and lighting power supplies.

Availability

S1MB R5G is available at Aetrix Electronics and suitable for industrial SMPS, LED drivers, AC/DC adapters, and DC-DC converter input stages requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for S1MB 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 industrial, computing, and consumer markets since 1979.

The S1AB–S1MB series targets cost-sensitive, high-reliability AC/DC power conversion applications where standardized voltage ratings, automated assembly readiness, and regulatory compliance are critical design requirements.

FAQ

What is the maximum junction temperature rating for the S1MB R5G?

The S1MB R5G has a maximum junction temperature (T_J) of +150°C, enabling reliable operation in enclosed or high-ambient-temperature environments such as LED luminaires and industrial power supplies. This rating must be respected during thermal design - actual junction temperature depends on power dissipation, PCB copper area, and airflow. The S1MB R5G's 30°C/W junction-to-lead thermal resistance helps estimate temperature rise under defined mounting conditions.

Does the S1MB R5G meet RoHS and halogen-free requirements?

Yes, the S1MB R5G is RoHS compliant and halogen-free per IEC 61249-2-21, using environmentally compliant materials in both die attach and molding compound. These attributes are verified in TSC's product change notifications and material declarations. The S1MB R5G satisfies regulatory requirements for export to EU, China, and other jurisdictions mandating restricted substances control - critical for lighting and industrial end equipment certification.

What does the "R5G" suffix indicate in S1MB R5G?

The "R5G" suffix in S1MB R5G denotes tape-and-reel packaging (R), green compound (G), and a specific date/factory code format per TSC's internal marking convention. It does not affect electrical parameters - all S1MB devices share identical VRRM (1000V), IF (1A), and thermal specifications regardless of suffix. The S1MB R5G is functionally identical to S1MB in electrical performance and mechanical dimensions.

Can the S1MB R5G replace the S1KB or S1JB in an existing design?

The S1MB R5G can replace S1KB (800V) or S1JB (600V) only if the circuit's peak reverse voltage stress remains within 1000V and thermal/mechanical constraints allow the same DO-214AA footprint. No electrical redesign is needed, but layout verification is recommended due to higher VRRM-related parasitic capacitance and potential differences in surge energy absorption. The S1MB R5G maintains identical pinout and solder profile as S1KB and S1JB.

Is the S1MB R5G suitable for use in automotive applications?

No, the S1MB R5G is not qualified for automotive applications. Taiwan Semiconductor explicitly states that S1AB–S1MB devices are not designed for medical, life-saving, or life-sustaining systems - and automotive AEC-Q101 qualification is not claimed. For automotive front-end rectification, designers should select AEC-Q101-rated alternatives. The S1MB R5G remains appropriate for industrial, commercial, and lighting power supplies where AEC-Q101 is not required.