Taiwan Semiconductor Corporation MUR305S R7G

Overview

MUR305S from Taiwan Semiconductor is a 3A, 50V ultra-fast recovery surface-mount rectifier in DO-214AB (SMC) package, featuring 25ns reverse recovery time, 0.875V forward voltage at 3A/25°C, and 75A peak surge current - deployed in high-frequency switching mode power supplies for telecom infrastructure.

For engineers reviewing the MUR305S datasheet, MUR305S pinout, MUR305S application, or MUR305S equivalent, key selection criteria include V_RRM=50V, I_F=3A, t_rr=25ns, R_θJL=11°C/W, and DO-214AB mechanical compatibility with automated SMT assembly lines.

Technical Context

This single-die ultra-fast rectifier uses glass-passivated junction technology to achieve low reverse recovery charge and minimal switching losses in hard-switched topologies. Its 25ns t_rr and 0.875V V_F at 3A/25°C enable high-efficiency operation in 100–500kHz SMPS designs.

The device operates across –55°C to +175°C junction temperature range and maintains <5μA reverse leakage at 25°C, supporting stable freewheeling and output rectification in thermally constrained environments such as DC-DC modules and AC-DC adapters.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with matte tin-plated leads, cathode indicated by band, moisture sensitivity level 1 (per J-STD-020), UL 94V-0 molding compound, and 0.210g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06S and ES3D, the MUR305S delivers the fastest recovery (25ns) and lowest forward voltage (0.875V) within its 50V class, making it optimal for high-efficiency, high-frequency telecom and server power stages where switching loss dominates thermal design.

Availability

MUR305S is available at Aetrix Electronics and suitable for telecom DC-DC converters, industrial PLC power supplies, and LED driver secondary rectification requiring stable component supply and full traceability.

Supply support for MUR305S 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 and computing markets since 1979.

The MUR305S belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-frequency switching power conversion in space-constrained, thermally demanding applications such as telecom infrastructure and server power supplies.

FAQ

What is the maximum junction temperature rating for the MUR305S?

The MUR305S has a maximum junction temperature (T_JMAX) of +175°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet. This rating enables reliable operation in sealed enclosures and high-ambient environments. The MUR305S maintains specified electrical parameters up to this limit, provided thermal design meets R_θJL = 11°C/W constraints. Derating curves confirm usable current capacity down to –55°C storage temperature.

Is the MUR305S RoHS and halogen-free compliant?

Yes, the MUR305S is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet. The device uses matte tin-plated leads and UL 94V-0 molding compound, meeting both environmental and safety requirements for commercial and industrial electronics. These compliance attributes are certified and documented in TSC's material declarations for the MUR305S.

What is the reverse recovery time (t_rr) of the MUR305S and under what test conditions?

The MUR305S has a 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 the Electrical Specifications table in the official datasheet. This value applies specifically to the MUR305S variant and is confirmed across the MUR305S–MUR320S subgroup. The MUR305S achieves this performance using glass-passivated ultra-fast junction technology.

Does the MUR305S have a defined moisture sensitivity level (MSL)?

Yes, the MUR305S has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions without baking prior to reflow. This is confirmed in the "Features" section of the Taiwan Semiconductor datasheet and simplifies handling in automated SMT assembly lines. The MUR305S packaging and molding compound meet all Level 1 requirements for floor life and reflow robustness.

What is the forward voltage (V_F) of the MUR305S at 3A and 150°C junction temperature?

The forward voltage (V_F) of the MUR305S is 0.710 V at I_F = 3 A and T_J = 150°C, as specified in the Electrical Specifications table. This lower V_F at elevated temperature reflects the device's optimized silicon process and contributes to improved thermal stability in high-power-density designs. The MUR305S maintains this performance across its full operating temperature range without derating penalties beyond those shown in the forward current derating curve.