Taiwan Semiconductor Corporation MUR110S

Overview

MUR110S from Taiwan Semiconductor is a 1A, 100V ultra-fast recovery surface-mount rectifier diode in DO-214AA (SMB) package, featuring 25ns reverse recovery time, 0.875V forward voltage at 1A/25°C, and 40A surge current rating; used in high-efficiency AC/DC adapters and offline SMPS secondary-side rectification.

For engineers reviewing the MUR110S datasheet, MUR110S pinout, MUR110S application, or MUR110S equivalent, key selection criteria include V_RRM = 100V, t_rr = 25ns, I_F = 1A, thermal resistance R_θJL = 17°C/W, and SMB package compatibility with automated SMT assembly.

Technical Context

This single-die, unidirectional silicon rectifier uses glass-passivated junction technology to achieve stable ultra-fast switching performance across -55°C to +175°C operating range. Its low Q_rr and tight t_rr tolerance support high-frequency operation in flyback and forward converters.

The device is optimized for low conduction loss (V_F ≤ 0.875V @ 1A/25°C) and low leakage (I_R ≤ 2µA @ 100V/25°C), enabling high efficiency in compact power supplies where thermal management is constrained by SMB footprint.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Compared with STTH1R06 and ES1J, the MUR110S delivers superior efficiency in 100V-class secondary rectification due to its 25ns t_rr and 0.875V V_F, while maintaining identical SMB footprint and lead-free compliance-enabling direct layout reuse without thermal derating penalties.

Availability

MUR110S is available at Aetrix Electronics and suitable for AC/DC adapters, offline SMPS, LED drivers, and DC-DC converter outputs requiring stable component supply, JEDEC-compliant packaging, and long-term industrial availability.

Supply support for MUR110S 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 MUR110S belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-frequency, high-efficiency AC/DC and DC/DC power conversion where low V_F, fast t_rr, and SMB-mount reliability are essential.

FAQ

What is the maximum junction temperature rating for MUR110S?

The MUR110S has a maximum junction temperature (T_J) of +175°C, allowing reliable operation in thermally demanding environments such as enclosed power supplies or high-ambient-temperature industrial equipment. This rating is validated per TSC's absolute maximum ratings table and supports continuous operation up to 175°C when thermal design meets R_θJL = 17°C/W limits. The MUR110S maintains stable V_F and I_R performance across this full range.

Is MUR110S compatible with lead-free reflow soldering processes?

Yes, the MUR110S features matte tin-plated leads qualified to J-STD-002 for solderability and complies with JEDEC moisture sensitivity level 1, meaning it can be processed using standard lead-free reflow profiles (e.g., peak 260°C) without baking or dry-pack requirements. Its DO-214AA (SMB) package and halogen-free molding compound fully support RoHS and IPC-J-STD-020 compliance. The MUR110S is designed for direct integration into modern SMT lines.

What is the reverse recovery time (t_rr) of MUR110S and how is it measured?

The MUR110S has a typical reverse recovery time (t_rr) of 25 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_RR = 0.25 A per TSC's electrical specifications. This value reflects the diode's ability to transition rapidly from conduction to blocking state, directly reducing switching losses in high-frequency converters. The MUR110S achieves this performance via optimized carrier lifetime control in its ultra-fast silicon structure.

Does MUR110S have a specified junction-to-ambient thermal resistance (R_θJA)?

No, TSC specifies only junction-to-lead thermal resistance (R_θJL) = 17°C/W for the MUR110S, as R_θJA depends heavily on PCB layout, copper area, and airflow. Engineers must calculate R_θJA based on their specific board design using thermal simulation or empirical measurement. The MUR110S's low R_θJL enables effective heat transfer to the PCB copper, making it suitable for compact layouts where external heatsinks are impractical.

Can MUR110S replace MUR105S in an existing design?

Yes, the MUR110S is a direct upgrade from MUR105S with identical package (DO-214AA/SMB), pinout, and thermal characteristics, but offers higher V_RRM (100V vs. 50V) and same t_rr (25ns). No PCB or layout changes are needed. The MUR110S provides increased reverse voltage margin for improved reliability in fluctuating input conditions, while maintaining identical forward performance (V_F = 0.875V @ 1A/25°C) and surge rating (40A).