Taiwan Semiconductor Corporation S1MBHR5G

Overview

S1MBHR5G from Taiwan Semiconductor is a 1 A, 1000 V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 30 A surge capability, and 1.1 V max forward voltage at 1 A - used in high-voltage AC/DC front-end stages of offline SMPS and LED drivers.

For engineers reviewing the S1MBHR5G datasheet, S1MBHR5G pinout, S1MBHR5G application, or S1MBHR5G equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), thermal resistance (30 °C/W), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and SMB package compatibility with automated placement.

Technical Context

This single-die standard rectifier operates as a unidirectional current path in bridge or single-phase configurations, with junction temperature range from –55 °C to +150 °C and rated average forward current of 1 A at case temperature ≤ 75 °C. Its 12 pF junction capacitance at 4 V reverse bias supports moderate-frequency switching up to ~100 kHz.

The device uses a glass-passivated PN junction for stable leakage performance (≤5 µA @ 25 °C, ≤50 µA @ 125 °C) and withstands 8.3 ms half-sine surge currents up to 30 A. Polarity is marked by cathode band; terminals are matte tin-plated per J-STD-002.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package: molded UL 94V-0 compound, matte tin-plated leads, cathode indicated by band, weight ≈ 0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S1MBHR5G, STTH1R06S offers lower cost but reduced voltage margin and worse thermal performance, while ES1J-M3/84A matches the SMB footprint but sacrifices 0.6 V in forward voltage - impacting efficiency in high-duty-cycle applications.

Availability

S1MBHR5G is available at Aetrix Electronics and suitable for offline AC/DC adapters, LED driver input rectification, and industrial SMPS front-end designs requiring stable component supply, long-lifecycle availability, and J-STD-020 Level 1 moisture handling.

Supply support for S1MBHR5G 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 S1AB–S1MB series was designed specifically for cost-sensitive, high-volume AC/DC rectification applications demanding reliability, automated assembly compatibility, and regulatory compliance - especially in adapter, lighting, and converter segments.

FAQ

What is the maximum repetitive peak reverse voltage rating for S1MBHR5G?

The S1MBHR5G has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V. This rating ensures reliable blocking capability in high-line AC applications such as 277 VAC industrial lighting or 264 VAC universal-input power supplies. The 1000 V rating provides substantial safety margin above the 373 V peak of 264 VAC, reducing risk of avalanche failure during transient overvoltage events. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet for S1MBHR5G.

Does S1MBHR5G meet RoHS and halogen-free requirements?

Yes, S1MBHR5G is RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor explicitly states this in the Features section of the S1MBHR5G datasheet. The device uses halogen-free molding compound and lead finishes that comply with both EU RoHS Directive 2011/65/EU and JEDEC JS-709B standards. These certifications are verified through material declarations and third-party testing, making S1MBHR5G suitable for export to regulated markets including the EU, Japan, and South Korea.

What is the thermal resistance from junction to lead for S1MBHR5G?

The junction-to-lead thermal resistance (R_θJL) of S1MBHR5G is 30 °C/W, as specified in the Thermal Performance section of the datasheet. This parameter enables thermal design using PCB copper as a heatsink - for example, a 100 mm² 2-oz copper pad can dissipate ~1.2 W at ΔT = 36 °C. The value is measured under standardized conditions per JESD51-14 and applies directly to the DO-214AA (SMB) package used by S1MBHR5G, supporting accurate junction temperature estimation in real-world layouts.

Is S1MBHR5G suitable for automated SMT placement without baking?

Yes, S1MBHR5G has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH and placed directly onto PCBs without pre-baking. This eliminates floor-life tracking and dry-pack requirements in high-volume manufacturing. The Level 1 rating is achieved via hermetic molding and terminal plating validated per J-STD-020 test methods, and is documented in the Mechanical Data section of the S1MBHR5G datasheet.

What is the typical forward voltage drop of S1MBHR5G at rated current?

The S1MBHR5G has a maximum forward voltage (V_F) of 1.1 V at I_F = 1 A and T_J = 25 °C, with typical values near 0.95 V under the same conditions. This specification is measured using a 0.3 ms pulse to avoid self-heating effects. The low V_F reduces conduction losses in high-duty-cycle rectification stages, directly improving system efficiency - especially critical in thermally constrained adapters and LED drivers where S1MBHR5G is commonly deployed.