Taiwan Semiconductor Corporation MUR115S

Overview

MUR115S from Taiwan Semiconductor is a 1A, 150V 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 50µA reverse leakage at 150°C - used in high-frequency switching power supplies for efficient AC/DC conversion.

For engineers reviewing the MUR115S datasheet, MUR115S pinout, MUR115S application, or MUR115S equivalent, key selection criteria include repetitive peak reverse voltage (150V), ultra-fast trr (25ns), thermal resistance (17°C/W), junction temperature range (–55°C to +175°C), and RoHS/halogen-free compliance for industrial-grade SMPS design.

Technical Context

The MUR115S is a single-die, planar passivated silicon rectifier optimized for high-frequency operation. Its ultra-fast recovery (trr ≤ 25ns) minimizes switching losses in DC-DC converters and offline SMPS topologies, while the low VF (0.875V @ 1A, 25°C) reduces conduction loss under continuous load.

Thermally, it features a junction-to-lead resistance of 17°C/W and operates across –55°C to +175°C, enabling reliable performance in compact, thermally constrained layouts. The DO-214AA (SMB) package supports automated placement and meets J-STD-002 solderability and JESD201 Class 2 whisker resistance standards.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002; polarity identified by molded cathode band on body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06, MUR115S offers faster recovery and lower VF in a smaller SMB package; compared with ON Semi MUR115, it provides equivalent performance with Taiwan Semiconductor's qualification and supply chain continuity.

Availability

MUR115S is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, and industrial SMPS requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for MUR115S 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 management and industrial markets since 1979.

The MUR115S belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency switching power conversion in cost-sensitive yet thermally demanding applications.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) of the MUR115S?

The MUR115S has a VRRM of 150 V, verified per Taiwan Semiconductor's L2102 datasheet. This rating ensures reliable blocking during transient surges in 115VAC input circuits. It is not interchangeable with MUR120S (200V) or MUR140S (400V) without verifying system voltage margins. Designers must confirm worst-case reverse stress including ringing and line transients before selecting MUR115S.

Does the MUR115S have a specified reverse recovery time (trr)?

Yes, the MUR115S specifies trr ≤ 25 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A test conditions. This ultra-fast recovery is confirmed in the Electrical Specifications table of the official datasheet (Version L2102). It directly enables high-frequency operation in SMPS designs where switching losses must be minimized - a key differentiator from standard fast recovery diodes.

What package type does the MUR115S use, and is it compatible with automated assembly?

The MUR115S uses the DO-214AA (SMB) surface-mount package, with matte tin-plated leads compliant with J-STD-002 solderability requirements. Its MSL Level 1 rating and standardized footprint make it fully compatible with high-speed pick-and-place equipment and reflow processes. No special handling or baking is required prior to assembly - a critical advantage for high-volume manufacturing of MUR115S-based power supplies.

What is the forward voltage (VF) of the MUR115S at 1A and 25°C?

The MUR115S exhibits a typical forward voltage of 0.875 V at IF = 1 A and TJ = 25°C, as published in the Electrical Specifications table. At elevated junction temperatures (150°C), VF drops to 0.710 V due to silicon's negative temperature coefficient. This low VF contributes directly to reduced conduction loss and improved thermal performance in compact adapter and lighting applications using MUR115S.

Is the MUR115S RoHS and halogen-free compliant?

Yes, the MUR115S is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet (Version L2102). The molding compound meets UL 94V-0 flammability rating, and all materials are documented for environmental compliance - supporting MUR115S use in regulated consumer, industrial, and medical-adjacent equipment where substance restrictions apply.